atelNum int64 1 15.2k | title stringlengths 8 376 | authors stringlengths 3 6.6k | body stringlengths 11 5.12k | submissionDate stringlengths 19 19 | keywords stringlengths 4 185 |
|---|---|---|---|---|---|
801 | Soft X-ray decline and cessation of pulsation in RS Oph | J Osborne, K Page, A Beardmore, M Goad (Leicester), M Bode (Liverpool John Moores), T O'Brien (Manchester), G Schwarz (West Chester), S Starrfield, J-U Ness (Arizona State), J Krautter (Heidelberg), J Drake (SAO), A Evans (Keele), S P S Eyres (Central Lancashire) | The very bright super-soft X-ray phase of the recurrent nova RS Oph has been extensively observed by the Swift XRT. The highly variable soft X-ray flux reported in ATEL #764 and ATEL#770 stabilised significantly after 2006 Mar 31.4; the XRT observations have subsequently shown a linear decline between Apr 12.1 and Apr ... | 2006-05-02 02:22:00 | x-ray,nova,variables |
802 | Swift Observations of SN 2006bv in UGC 7848 | S. Immler, Goddard Space Flight Center, NASA, and Universities Space Research Association, and D. Pooley, University of California at Berkeley, on behalf of the Swift-satellite team | We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of the type-IIn SN 2006bv (CBET #493, #494) obtained on 2006-05-01.76 UT.
UVOT magnitudes are V = 18.9 ± 0.2, B = 19.0 ± 0.2, U = 18.6 ± 0.2, UVW1 [181-321 nm] = 20.3 ± 0.3, UVM2 [166-268 nm] = 20.1 ± 0.3, and UVW2 [112... | 2006-05-02 21:15:00 | optical,ultra-violet,x-ray,supernovae |
803 | Rapid strengthening of iron forbidden lines in the spectrum of V838 Mon | E. Barsukova (SAO, Russia), V. Goranskij (SAI, Moscow Univ.), P. Abolmasov and S. Fabrika (SAO, Russia) | V838 Mon is a peculiar nova which showed a red K-M type spectrum in its outburst in 2002. Along with two similar objects, V4332 Sgr and M31 V1006/7, it forms a new class of eruptive variable stars. We report spectral observations obtained with the Russian 6-m BTA telescope (Special Astrophysical Observatory). In our sp... | 2006-05-06 01:02:00 | optical,binary,nova,star,variables |
804 | Optical Spectroscopy of the IGR J16195-4945 Candidate Counterpart | Gagik Tovmassian (OAN, IA, UNAM, Ensanada, BC, Mexico), John A. Tomsick (CASS/UCSD), and Ronald Mennickent (Univ. de Concepcion, Chile) | On 2005 October 5, we observed the candidate optical counterpart of the INTEGRAL source IGR J16195-4945 with the EMMI spectrograph attached to the ESO 3.5m NTT in La Silla, Chile (see Tomsick et al. 2006; astro-ph/0603810 v2 and references therein for the details about this likely High-Mass X-ray Binary). The Chandra p... | 2006-05-06 07:00:00 | optical,x-ray,binary,neutron star,star |
805 | Possible Nova in M31 | W. Pietsch (Max Planck Institut f. extraterr. Physik, MPE), V. Burwitz (MPE, Observatori Astronomic de Mallorca OAM), J. Rodriguez, A. Garcia (OAM) | We report the discovery of a possible nova in M31 on an rgb and an unfiltered CCD image (2006, April 26.273, 15.9 mag; 28.263, 16.1 mag) obtained with the Bradford Robotic Telescope Galaxy at the Tenerife Observatory (365mm, f/11 Schmidt-Cassegrain telescope with a 0.67 focal reducer with a FLI MaxCam ME2 1k x 1k CCD c... | 2006-05-08 22:05:00 | optical,nova,star |
806 | Radio flare in Cygnus X-3 | Guy Pooley (MRAO, Cavendish Lab, Cambridge UK) | The X-ray binary Cygnus X-3 has flared in the radio to approximately 14 Jy at 15 GHz, as monitored with the Ryle Telescope in Cambridge (UK) on 2006 May 10 at 01h. Further observations are encouraged. A postscript plot for the current month, including public -access data from RXTE, can be viewed on http://www.mrao.cam.... | 2006-05-10 16:50:00 | radio,millimeter,x-ray,gamma ray,binary,variables,request for observations |
807 | X-ray flaring of Cygnus X-3 | D. M. Palmer (LANL), H. A. Krimm (GSFC/USRA) on behalf of the Swift-BAT team | Swift-BAT finds a flare from Cygnus X-3 in the 15-50 keV band that is simultaneous with the 14 Jy radio flare reported in ATEL #806 (Pooley, 2006). The emission began rising from a low level on 2006 May 8, peaking at an intensity of approximately 100 milliCrab on May 10, and is currently declining from that level.
Cyg... | 2006-05-12 05:25:00 | radio,x-ray,gamma ray,binary,transient,variables |
808 | Novae in M31 | WeCAPP (Wendelstein Calar Alto Pixellensing Project): O. Baernbantner, A. Riffeser et. al. (Universitaets-Sternwarte Muenchen) | We report the discovery of two possible Novae in M31 at JD 2453863.6 (2006, May 8.1 UT). The first one was detected with 17.8 mag in R at a position RA(2000) = 00h 43m 13.42s, Dec(2000) = +41° 16' 58.9". This detection was formerly reported by ATEL #805 and confirmed by our observations. The second Nova with 18.1 mag ... | 2006-05-12 20:34:00 | optical,nova |
809 | GMRT observation of radio flare in Cygnus X-3 at 614 MHz | Sabyasachi Pal (NCRA, India), C. H. Ishwara-Chandra (NCRA, India), A. Pramesh Rao (NCRA, India) | Cygnus X-3 is in flaring state in the radio and X-ray band for the last few days (ATEL #806 and #807). We have observed Cygnus X-3 with Giant Meter Radio Telescope (GMRT), India at 614 MHz. These observations are centered at UT 10.91, 11.92, 12.98 of May 2006 (MJD 53865.9, 53866.9, 53868.0). Comparing GMRT flux measure... | 2006-05-14 23:20:00 | radio,x-ray,binary,black hole,transient |
810 | The discovery of five new hard X-ray sources in the Circinus region by INTEGRAL | S. Keek (SRON), L. Kuiper (SRON) and W. Hermsen (SRON, Amsterdam) | We report the discovery with INTEGRAL IBIS-ISGRI of five new hard X-ray sources in the Circinus region in an ultra-deep mosaic image (20-60 keV) targeted at radio pulsar PSR B1509-58. The observations (archival and open time) have been performed between 2003, February 28 and 2005, March 3, totalling an exposure time of... | 2006-05-15 19:51:00 | radio,optical,x-ray,gamma ray,agn,binary,black hole,cataclysmic variable,neutron star,pulsar,quasar,star,transient,variables |
811 | SWIFT and RXTE observations of Cir X-1 in an extended low-flux state | P. G. Jonker (SRON/CfA), J. H. Swank (NASA/GSFC), L. Kuiper (SRON), J. Homan (MIT), C. B. Markwardt (UMD/NASA/GSFC) | We report on our analysis of RXTE and two SWIFT observations of Cir X-1. RXTE/ASM observations show that Cir X-1 has been at or below the ASM detection level as of April 26 (MJD 53851.630). Hence the source has been undetected for more than 1 binary orbital period. An RXTE/PCA observation has been obtained on May 9 at ... | 2006-05-17 22:08:00 | x-ray,binary,neutron star,star,variables,request for observations |
812 | Correction to Atel #811: SWIFT and RXTE observations of Cir X-1 in an extended low-flux state | P. G. Jonker (SRON/CfA), J. H. Swank (NASA/GSFC), L. Kuiper (SRON), J. Homan (MIT), C. B. Markwardt (UMD/NASA/GSFC) | The reported parameters for the SWIFT observation of May 16, 01:22 UTC in Atel #811 are wrong. The observation lasted 385 seconds and the observed count rate and 0.5-10 keV source flux are 0.19 counts/s and 2E-11 erg cm^-2 s^-1, respectively. The spectrum is consistent with that of the SWIFT observation of May 16, 10:4... | 2006-05-17 23:28:00 | x-ray,a comment |
813 | Outburst of a new source IGR J08408-4503 detected by INTEGRAL | D. Gotz, S. Schanne, J. Rodriguez (CEA Saclay), J-C. Leyder (IAG Liege and ISDC), A. von Kienlin (MPE Garching), N. Mowlavi (ISDC), S. Mereghetti (IASF Milano) | We report the discovery of a new source, IGR J08408-4503, with the ISGRI camera of the IBIS telescope on board the INTEGRAL satellite, during the deep observation of the Vela region on May 15th 2006. The source is detected in a single 1 hour long pointing and inspection of the source light curve on a 100 s time scale r... | 2006-05-18 23:03:00 | x-ray,gamma ray,binary,black hole,gamma-ray burst,neutron star,star,transient |
814 | IGR J08408-4503 is a recurrent transient | S. Mereghetti, L. Sidoli, A. Paizis (IASF Milano), D. Gotz (CEA Saclay) | Analysis of data in the INTEGRAL archive shows that an outburst from the recently discovered source IGR J08408-4503 (Atel #813) occurred on 1st July 2003. The outburst lasted approximately two hours. During its brightest part (around 20 UT) an average flux of about 6x10-10 erg/cm2/s was detected in the 20-60 keV range ... | 2006-05-19 03:06:00 | x-ray,binary,star,transient |
815 | Emission-line early-type stars as possible optical counterparts of INTEGRAL hard X-ray sources IGR J08408-4503 and IGR J15539-6142 | N. Masetti, L. Bassani (INAF/IASF, Bologna), A. Bazzano (INAF/IASF, Rome), A. J. Dean (Univ. Southampton), J. B. Stephen (INAF/IASF, Bologna), R. Walter (ISDC, Versoix) | We retrieved and analyzed ESO archival spectra of the blue supergiant star HD 74194, putatively associated with the hard X-ray source IGR J08408-4503 (Gotz et al., ATel #813; Mereghetti et al., ATel #814). The spectra were acquired on 2003 Jan 9, for a total exposure time of 10 s, under programme 70.C-0396(A) at the ES... | 2006-05-19 23:23:00 | optical,x-ray,binary,star,transient,a comment |
816 | Renewed Activity of IGR J16479-4514 | C. B. Markwardt (U. Maryland & NASA/GSFC), H. A. Krimm (USRA & NASA/GSFC) | On 20 May at 17:32 UT, the Swift BAT detected the recurrent fast X-ray transient IGR J16479-4514 (Molkov et al., ATEL #176) as Swift trigger number 210886. While we do not have flux information at this time, the source was detected at 5.8 sigma in 320 seconds in the 15-50 keV band, which is much more intense than has b... | 2006-05-21 02:07:00 | x-ray,gamma ray,binary,transient,request for observations |
817 | Refined position of IGR J08408-4503 by JEM-X on INTEGRAL | S. Brandt, C. Budtz-Jørgensen, N. Lund, (DNSC, Copenhagen), D. Gotz, S. Schanne, J. Rodriguez (CEA Saclay), A. von Kienlin (MPE Garching) | We report a refined position of IGR J08408-4503 based on data from the JEM-X X-ray monitor on INTEGRAL taken during the outburst on May 15th 2006 that led to the discovery of the source (ATEL #813). The best estimate of the position is RA = 08h 40m 48.7s, Dec = -45o 03' 41'' (J2000, +-46'' at 90% confidence). This stre... | 2006-05-22 22:57:00 | optical,x-ray,gamma ray,binary,black hole,neutron star,pulsar,star,transient |
818 | Swift/XRT observation of IGR J08408-4503 | J. A. Kennea (PSU) and S. Campana (OAB) | At 10:46UT on May 22nd, 2006, Swift/XRT began a Target of Opportunity observation of the newly discovered super-fast X-ray Transient (SF-XRT) IGR J08408-4503 (e.g. ATEL #814). In 2ks of XRT photon counting mode data we find a faint point source inside the INTEGRAL JEM-X error circle reported by Brandt et al. (ATEL #817... | 2006-05-23 04:07:00 | optical,x-ray,gamma ray,star,transient |
819 | HD 74194, a new binary supergiant fast X-ray transient?, possible optical counterpart of INTEGRAL hard X-ray source IGR J08408-4503 | Rodolfo Barba, Roberto Gamen (Universidad de La Serena, Chile), Nidia Morrell (Las Campanas Observatory, Chile) | HD 74194 is an O-type supergiant, classified as O8.5 Ib (f) (Walborn 1973, AJ 78, 1067), also suspected as single-lined binary (see Maiz Apellaniz et al. 2004, ApJS 151, 103). This star is being spectroscopically monitored as part of our program of study of massive binaries. We have obtained high-resolution spectra of ... | 2006-05-23 18:28:00 | optical,x-ray,binary,star,transient,variables |
820 | Periodicity in XTE J0421+560/CI Cam | J. Z. Yan and Q. Z. Liu (Purple Mountain Obs., China) | We analyze the RXTE ASM one-day average light curve of XTE J0421+560/CI Cam. A period of 377+/-7 day is found by using the PDM method (phase dispersion minimization, R. F. Stellingwerf, 1978, ApJ, 224, 953). This period may be the orbital period of the binary system. Several weak flare events could be clearly seen on t... | 2006-05-24 09:33:00 | optical,x-ray,binary,black hole,neutron star,star,transient,variables |
821 | Nova in M31 | WeCAPP (Wendelstein Calar Alto Pixellensing Project): F. Lang, M. Lerchster, J. Fliri et al. (Universitaets-Sternwarte Muenchen) | We report the discovery of a possible nova in M31 on a R band CCD image at JD 2453877.5 (2006, May 22.1 UT) with 18.7 mag (accuracy 0.1 mag). The image was obtained with the Wendelstein telescope (0.8 m, 1k x 1k CCD camera with 24mu sq. pixels). The position obtained for the nova candidate is RA(2000) = 00h 43m 11.81s,... | 2006-05-24 15:08:00 | optical,nova,star |
822 | Supernova Discoveries: Type Ia SNF20060520-007 and Type II SNF20060520-011 | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. Aldering, S. Bailey, S. Bongard, D. Kocevski, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkel... | The Nearby Supernova Factory reports the discovery of two supernovae in images obtained using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking (NEAT) component of the Palomar Consortium. Spectra (range 320-1000 nm) of these targets obtained with the Supernova... | 2006-05-25 12:07:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
823 | Discovery of SNF20060524-023, a Type II Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, D. Kocevski, S. Loken, P. Nugent, S. Perlmutter... | The Nearby Supernova Factory reports the discovery of supernova SNF20060524-023 (coordinates RA 13:21:49.14 DEC -23:51:04.6 J2000.0) in images obtained May 25.2 UT at an approximate magnitude of 19.0 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Aste... | 2006-05-27 05:28:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
824 | Discovery of Unknown Transient (Possible CV) ROTSE3 J160213.1-021311.7 | E. S. Rykoff (UMich), J. Aretakis (UMich), T. Guver (U. Istanbul) report on behalf of the ROTSE collaboration: | Analysis of ROTSE-III sky patrol fields reveals an unknown transient we designate ROTSE3 J160213.1-021311.7. The object was first detected May 28.94, 2006 by the ROTSE-IIIc telescope at the H.E.S.S. site in Namibia, at an unfiltered magnitude of 18.2+/-0.2. It was not detected on May 27.94 with a limiting magnitude of ... | 2006-06-03 06:06:00 | optical,cataclysmic variable,transient,variables,request for observations |
825 | Discovery of SNF20060529-001, a Type IIn Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, D. Kocevski, S. Loken, P. Nugent, S. Perlmutter... | The Nearby Supernova Factory reports the discovery of supernova SNF20060529-001 (coordinates RA 14:47:43.31 DEC +09:39:33.9 J2000.0) in UGC 9530 (z = 0.028620, De Vaucouleurs et al. 1991 RC3.9) in images obtained May 29.4 UT at an approximate magnitude of 18.1 (calibrated to R) using the QUEST II camera in drift-scan m... | 2006-06-05 04:26:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
826 | Supernova Discoveries: Type IIn SNF20060601-002 and Type II SNF20060601-008 | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nuge... | The Nearby Supernova Factory reports the discovery of two supernovae in images obtained using the QUEST II camera in drift-scan mode on the Palomar Oschin 48-inch telescope as a part of the Palomar-QUEST survey. Spectra (range 320-1000 nm) of these targets obtained with the Supernova Integral Field Spectrograph (SNIFS)... | 2006-06-06 08:38:00 | infra-red,optical,ultra-violet,supernovae |
827 | An Unusual Optical Transient from Palomar-Quest: Possible Peculiar Supernova? | A. Mahabal, S. G. Djorgovski (Caltech), C. Baltay, and D. Rabinowitz (Yale), on behalf of the Palomar-Quest survey team; the Nearby Supernova Factory; A. Gal-Yam and A. Soderberg (Caltech); D. Stern (JPL), M. Dickinson, E. MacDonald (NOAO) and S. Juneau (University of Arizona) | An optical transient (OT) was detected in the Palomar-Quest scans taken of 20 May 2006 UT, in comparison with a combination of reference images taken in May and June 2002, by the SNfactory processing pipeline. The transient had a magnitude of R ~ 18.9 mag, and is located at RA = 14:39:33.21 and Dec = +05:46:36.6 (J2000... | 2006-06-07 00:40:00 | infra-red,optical,ultra-violet,agn,nova,star,supernovae,transient,variables |
828 | A fast-rise radio flare in Cyg X-3 | Trushkin S. A. (SAO RAS, Russia), Pooley G. (MRAO, Cavendish Lab, Cambridge UK), Harinov M. A., Mikhailov A. G. (IAA RAS, Russia) | We have detected new activity in X-ray binary Cyg X-3 (see ATEL #727, #806, #807, #809). We have observed Cygnus X-3 with RT32 (Institute of Applied Astronomy RAS, Russia) on 5 June 2006 (MJD53891) at 2.3 and 8.5 GHz. This date is within the interval covered by the Ryle telescope in Cambridge (UK) at 15 GHz, but the ob... | 2006-06-08 20:33:00 | radio,millimeter,x-ray,binary,black hole,request for observations |
829 | Nova in M31 | WeCAPP (Wendelstein Calar Alto Pixellensing Project): C. Ries, A. Riffeser et al. (Universitaets-Sternwarte Muenchen) | We report the discovery of a possible nova in M31 on a R-band CCD image at JD 2453894.52 (2006, June 8.02 UT) with 18.0 mag (accuracy 0.1 mag). The image was obtained with the Wendelstein telescope (0.8 m, 1k x 1k CCD camera with 24mu sq. pixels). The position obtained for the nova candidate is RA(2000) = 00h 42m 32.77... | 2006-06-09 01:22:00 | optical,nova |
830 | Unusual Strong Hard Flare or Burst in 1A 1246-588 | A. M. Levine (MIT), R. A. Remillard (MIT), and D. Galloway (U. of Melbourne) for the ASM team at MIT and NASA/GSFC | Observations with the RXTE All-Sky Monitor revealed a fast flare or unusual burst in the X-ray source 1A 1246-588 (RA 192.414, Dec -59.088; J2000) in four consecutive dwells on 2006 May 26. Each dwell was 90 s long with a 6 s interval between dwells to rotate the camera assembly. The X-ray flare began at 2006 May 26 18... | 2006-06-09 04:07:00 | optical,x-ray,binary,neutron star,pulsar,star |
831 | Optical counterpart to SAX J1818.6-1703 | Ignacio Negueruela (U. Alicante), David M. Smith (U. C. Santa Cruz) | The recurrent hard X-ray transient SAX J1818.6-1703 has been observed by several satellites. It displays strong very short flares (Grebenev & Sunyaev 2005, Ast. Lett. 31, 672; Sguera et al. 2005, A&A 444, 221), similar to those from the well described Supergiant Fast X-ray Transients XTE J1739-302 (Smith et al. 2006, A... | 2006-06-09 19:55:00 | infra-red,optical,x-ray,binary,star,transient |
832 | RS Oph - disappearance of optical flickering after the outburst | R. Zamanov, K. Panov (Institute of Astronomy, Sofia, Bulgaria), M. Boer, H. Le Coroller (Observatoire de Haute-Provence, France) | ATel.RSOph3 | 2006-06-10 05:54:00 | optical,binary,cataclysmic variable,nova,variables |
833 | Classification of SN 2006cx, a Type II Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nuge... | The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of SN 2006cx (CBET #542) in NGC 7316 (z = 0.018523; Giovanelli & Haynes, 1993, AJ, 105, 1271 via NED) obtained June 10.6 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope, reveals that it is a Type I... | 2006-06-11 05:46:00 | infra-red,optical,ultra-violet,supernovae |
834 | Discovery of a Type IIn Supernova Near 2MASX J13080105+2607124 | R. Quimby, P. Mondol (University of Texas) and The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, ... | Further to IAUC # 8622 , R. Quimby and P. Mondol report the discovery of a supernova in unfiltered CCD images taken on June 9.22 (at magnitude about 17.2), using the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory. The supernova (coordinates RA 13:08:01.23 DEC +26:06:59.0 J2000.0) is 2.3" east and 13.1" south o... | 2006-06-11 09:21:00 | infra-red,optical,ultra-violet,supernovae |
835 | Swift/XRT Detection of the Hard X-ray Source SWIFT J1656.3-3302 | J. Tueller (NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), M. Ajello (MPE Garching), V. Beckmann (UMBC/NASA/GSFC), T. Belloni (INAF/OAB), A. Falcone (PSU), O. Godet (U Leicester) , D. Grupe (PSU), S. Holland (USRA/NASA/GSFC), J. Kennea (PSU), K. Mukai (USRA/NASA/GSFC), R. Mushotzky (NASA/GSFC), T. Okajima (JHU/NASA/GSFC), R... | Transient source SWIFT J1656.3-3302(ATel #799) has been detected with the Swift/XRT x-ray telescope. The BAT position was observed for a total of 4.3 ks starting on 2006-06-09 at 3:32:01 UT. The position of the source (SWIFT J165616.5-330209) is RA=16 56 16.56 dec=-33 02 09.3 J2000 with an error of 3.7". SWIFT J165616.... | 2006-06-13 05:28:00 | radio,x-ray,gamma ray,star,transient,request for observations |
836 | XTE J1817-330 decline has reached the X-ray hard state | Ronald A. Remillard (MIT) and Jeffrey E. McClintock (CFA) | The X-ray outburst of the galactic black hole candidate XTEJ 1817-330 reached a maximum flux of 1.2 Crab (PCA, 2-30 keV) on 2006 January 30. Since then, this source has slowly declined while continuing to exhibit a soft X-ray spectrum. The decline reached 10-15 mCrab during 2006 May 18-31. However, the source brighteni... | 2006-06-13 21:53:00 | radio,x-ray,black hole,transient,request for observations |
837 | Flare in 1A 1246-588 is an Eddington-limited type I X-ray burst | E. Kuulkers (ESAC/ESA, Spain) & A. M. Levine (MIT, USA) | Prompted by the announcement of a strong flare seen on 2006 May 26 in the low-mass X-ray binary and X-ray burster 1A 1246-588 (ATel #830) we further analyzed the RXTE/ASM data. The X-ray emission during the flare is significantly harder than the X-ray emission before and after the flare. During the decay of the flare t... | 2006-06-14 16:20:00 | x-ray,binary,neutron star,star,variables |
838 | The end of the super-soft X-ray phase of the recurrent nova RS Ophiuchi | J Osborne, K Page, A Beardmore, M Goad (Leicester), M Bode (Liverpool John Moores), T O'Brien (Manchester), G Schwarz (West Chester), S Starrfield, J-U Ness (Arizona State), J Krautter (Heidelberg), J Drake (SAO), A Evans (Keele), S P S Eyres (Central Lancashire) | Swift X-ray telescope observations of the recurrent nova RS Oph showed a linear decline in soft X-ray flux from a plateau level between Apr 12.1 and Apr 28.7 (ATEL #801). Since then Swift observations have continued, initially at nominal intervals of 2 days, and later, 4 days.
The bright super-soft X-ray phase describ... | 2006-06-15 01:03:00 | x-ray,nova |
839 | A Strong Increase in the Orbital Modulation of the X-ray flux of GX9+9 | Alan M. Levine (MIT), Robert J. Harris (MIT), and Osmi Vilhu (U. of Helsinki) | Observations with the RXTE All-Sky Monitor (ASM) show that the modulation of the X-ray flux in the 2-12 keV band at the 4.19 hour orbital period of the LMXB GX9+9 has become strong since early in 2005. The modulation was originally discovered in HEAO 1 data by Hertz and Wood (ApJ 1988, 331, 764) and was detected with h... | 2006-06-17 03:13:00 | x-ray,binary,neutron star,star,request for observations |
840 | High state of Mkn 421 in the hard X-rays | G. G. Lichti (MPE), A. Neronov, N. Mowlavi (ISDC), M. Ajello, V. Beckmann, C. Boisson, J. Buckley, P. Charlot, W. Collmar, B. Degrange, A. Djannati-Atai, A. Falcone, J. Finley, G. Fossati, G. Henri, K. Katarzynski, D. Kieda, A. Lahteemaki, K. Mannheim, A. Marcowith, M. Punch, A. Saggione, L. Sauge, V. Schoenfelder, A. ... | RXTE/ASM data revealed an increased activity in the 3-10 keV energy of the TeV gamma-ray loud blazar Mkn 421. Its intensity began to rise in the middle of April 2006, reached a maximum around mid May and decreased since then. Its intensity began to increase again around 10th of June, 2006. This second increase led to t... | 2006-06-17 04:12:00 | radio,x-ray,gamma ray,tev,agn,blazar |
841 | Swift Observations of SN 2006dd in NGC 1316 | S. Immler (Goddard Space Flight Center, NASA, and Universities Space Research Association), P. Milne (Steward Observatory, University of Arizona), and P. J. Brown (Pennsylvania State University), on behalf of the Swift-satellite team: | We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of SN 2006dd (cf. CBET #533) obtained on June 20.71 UT.
We confirm the detection of a new object at R.A. = 03h22m41s.64, Decl. = -37o12'13".2 (equinox 2000.0) as compared to Digitized Sky Survey images, consistent with the p... | 2006-06-21 13:59:00 | optical,ultra-violet,x-ray,supernovae,the sun |
842 | Discovery of SNF20060616-022, a Type IIn Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, S. J. Ferrell, D. Kocevski, S.... | The Nearby Supernova Factory reports the discovery of supernova SNF20060616-022 (coordinates RA 21:49:57.67 DEC +32:01:58.7 J2000.0) in images obtained June 16.5 UT at an approximate magnitude of 19.5 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Ast... | 2006-06-22 11:14:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
843 | Outburst from EXO 2030+375 | R. H.D. Corbet (GSFC/USRA) and A. M. Levine (MIT), for the RXTE ASM team at MIT and NASA/GSFC | Observations with the RXTE All-Sky Monitor of the Be/neutron star binary EXO 2030+375 reveal a recent increase in flux that indicates a change of source state.
EXO 2030+375 has been seen with the ASM to exhibit regular outbursts on the known 46 day orbital period since the start of observations over 10 years ago on MJ... | 2006-06-24 04:40:00 | x-ray,binary,neutron star,star,transient |
844 | Nova in M31 | E. Ovcharov (SU, Sofia), I. Stanev (SU, Sofia), Ts. Georgiev (IA, Sofia), P. Nedialkov (SU, Sofia) | We report the discovery of an apparent nova located at RA(2000) = 00h 43m 11s.87, Dec(2000) = +41° 13' 44".9, which is 310".7 east and 143".6 south of the center of M31. Available R-band magnitude from 5x300s CCD images taken with the 50/70cm telescope at NAO Rozhen, Bulgaria: June 27.0244 UT, 19.2+/-0.4; The nearest ... | 2006-06-27 19:54:00 | optical,nova,variables |
845 | 4 Bursts from AXP 4U 0142+61 | R. Dib, V. Kaspi (McGill); F. Gavriil (NASA/GSFC); P. Woods (Dynetics) | On MJD 53911.05 (June 25, 2006) during regular RXTE/PCA monitoring of AXP 4U 0142+61, we detected four SGR-like bursts within 4 min, along with a pulsed flux enhancement. The first burst was detected at 1:20:13 UTC, lasted approximately 0.6 seconds, and had a total fluence of approximately 100 counts in 2-20 keV with 3... | 2006-06-28 13:14:00 | x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient,request for observations |
846 | Swift Detection/Confirmation of the Hard X-ray Source SWIFT J2114.3+8206/S52116+81 | A. Falcone (PSU), J. Tueller (NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), M. Ajello (MPE Garching), S. Barthelmy (GSFC), T. Belloni (INAF/OAB), N. Gehrels (GSFC), O. Godet (U Leicester) , D. Grupe (PSU), S. Holland (USRA/NASA/GSFC), J. Kennea (PSU), K. Mukai (USRA/NASA/GSFC), R. Mushotzky (NASA/GSFC), R. Sambruna (NASA/G... | SWIFT J2114.3+8206 has been detected with the Swift/BAT as part of the hard X-ray survey and with the Swift/XRT X-ray telescope during recent follow-up pointed observations. Swift/BAT confirmed SWIFT J2114.3+8206 as a hard X-ray source by detecting it in the 14-195 keV band with a significance of 7.6 sigma using the 9-... | 2006-06-29 03:46:00 | radio,x-ray,gamma ray,agn,black hole,blazar,quasar |
847 | Optical Classification of Three Swift BAT/XRT Sources at Low Galactic Latitude | J. P. Halpern (Columbia U.) | I report optical spectroscopic classifications of three Swift BAT/XRT sources at low Galactic latitude from the lists of Tueller et al. (ATel #669) and Kennea et al. (ATel #677). Each of the counterparts, whose positions are within their respective Swift XRT error circles, are present in the USNO-B1.0 and 2MASS catalog... | 2006-06-29 04:02:00 | radio,optical,x-ray,agn,binary,variables |
848 | INTEGRAL observation of flaring activity of Mrk 421 | G. G. Lichti (MPE, Garching), S. Paltani, M. Mowlavi (ISDC, Geneva), M. Ajello, W. Collmar, A. von Kienlin (MPE, Garching), V. Beckmann (NASA/GSFC), C. Boisson, H. Sol (Obs. Paris), J. Buckley (Washington Univ.), P. Charlot (Bordeaux Obs.), B. Degrange (Ecole Polytechnique Bordeaux), A. Djannati-Atai, M. Punch (College... | INTEGRAL observed Mrk 421 nearly continuously from June 14, 2006 07:54:19.0 UT until June 25, 2006 19:54:28 UT (and not July 25 as was erroneously written in ATEL #840). During this time the source was observed to be highly variable in both IBIS/ISGRI and JEM-X. Three flares were observed during this observation, respe... | 2006-06-30 00:29:00 | radio,optical,x-ray,agn,variables |
849 | RXTE observations of the Rapid Burster | N. Shaposhnikov (NASA/GSFC & USRA), J. H. Swank (NASA/GSFC) , & C. B. Markwardt (NASA/GSFC & UMD) | RXTE observations of the LMXB transient MXB 1730-33 (Rapid Burster) show that the source went into outburst about June 15, 2006. This is over 161 days after the previous outburst as seen by the ASM, which was in turn about 142 days after the one previous to it. These outbursts indicate an increase in recurrence interva... | 2006-07-01 00:29:00 | radio,infra-red,optical,x-ray,binary,neutron star,star,transient,request for observations |
850 | Spectroscopic Confirmation of Nova Candidates in M31 | W. Pietsch (Max Planck Institut f. extraterr. Physik Garching MPE), V. Burwitz (MPE), J. Greiner (MPE), A. Rau (California Institute of Technology), G. Sala (MPE), R. Bender (MPE, Universitaets-Sternwarte Muenchen USM), J. Fliri (USM), A. Riffeser (MPE, USM), S. Seitz (USM), M. Alises (Centro Astronomico Hispano Al... | We report on the spectroscopic confirmation of four recent optical nova candidates in M31 using the 2.2 m telescope and the Calar Alto Faint Object Spectrograph CAFOS at CAHA on Calar Alto, Spain. The spectra covered the range 400-850 nm (G-200), 490-780 nm (G-100) and 320-580 nm (B-100). The outburst of the apparent n... | 2006-07-03 19:59:00 | optical,nova |
851 | BAT Detects a New Outburst of 4U 1608-522 | C. B. Markwardt (NASA/GSFC and U. Md.), H. A. Krimm (NASA/GSFC and USRA), D. Sanwal (NASA/GSFC), J. Tueller (NASA/GSFC) | The Swift BAT instrument detects a new outburst of the transient 4U 1608-522, based on images taken in survey mode. The source had been quiescent since December 2005.
Starting on June 29, 2006, the source began to rise linearly from quiescence, and had reached a flux of about 130 mCrab (15-50 keV) by July 6. The RXTE ... | 2006-07-07 05:21:00 | x-ray,gamma ray,binary,neutron star,star,transient,request for observations |
852 | Swift Observations of SN 2006dm in MCG -01-60-21 | S. Immler, Goddard Space Flight Center, NASA, and Universities Space Research Association; P. J. Brown, Pennsylvania State University, P. Milne, Steward Observatory, University of Arizona; on behalf of the Swift-satellite team | We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of SN 2006dm (cf. CBET 568, 569). The following UVOT magnitudes were measured for SN 2006dm on July 5.63 UT: V = 16.7 (421-s exposure), B = 16.8 (428 s), U = 16.4 (423 s), UVW1 [181-321 nm] = 18.3 (852 s), UVM2 [166-268 nm] >... | 2006-07-07 06:50:00 | optical,ultra-violet,x-ray,supernovae |
853 | Swift BAT Survey Reports 3 New Hard X-ray Sources Near the Galactic Plane | J. Tueller (NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), M. Ajello (MPE Garching), S. Barthelmy (GSFC), T. Belloni (INAF/OAB), A. Falcone (PSU), N. Gehrels (GSFC), O. Godet (U Leicester) , D. Grupe (PSU), S. Holland (USRA/NASA/GSFC), J. Kennea (PSU), K. Mukai (USRA/NASA/GSFC), R. Mushotzky (NASA/GSFC), R. Sambruna (NASA/G... | The Swift/BAT hard X-ray survey (ATEL #668, ATEL #669) reports the detection of 3 sources near the galactic plane, including two with possible SNR counterparts. The BAT error circle for these weak sources is ~6 arcmin radius. Transient sources are likely and without a better position, a firm identification of these sou... | 2006-07-08 01:16:00 | radio,x-ray,gamma ray,transient,request for observations |
854 | Supernova Classifications: Type Ib SN 2006dn and Type Ia SN 2006do | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nu... | The Nearby Supernova Factory reports the classification of two supernovae using spectra (range 320-1000 nm) obtained with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope.
The spectrum (obtained July 08.5 UT) of SN 2006dn (CBET #571) in UGC 12188 reveals that it is of Type Ib, ... | 2006-07-09 05:11:00 | infra-red,optical,ultra-violet,supernovae |
855 | optical outburst of 4u 1608-522 (=QX Nor) | Charles D Bailyn (Yale) | SMARTS consortium observations with the 1.3m telescope at CTIO + ANDICAM instrument show that QX Normae, the optical counterpart of 4U 1608-522, is in outburst (see Markwardt et al. ATEL 851 for a description of the current high energy outburst). We obtained a 12m I-band image starting at UT=2:01 July 9 2006 that showe... | 2006-07-10 00:04:00 | optical,binary,neutron star,star,transient |
856 | Classification of SN 2006dp, a Type II Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nuge... | The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of SN 2006dp in MCG-01-03-056 (CBET #574) obtained July 13.6 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope, reveals that it is a Type II supernova. P Cygni features from hydrogen Balmer lines, He... | 2006-07-14 04:24:00 | infra-red,optical,ultra-violet,supernovae |
857 | Radio observations of 4U 1608-522 during outburst | S. Migliari (UCSD), A. K. Tzioumis (ATNF) | The Australia Telescope Compact Array (ATCA) observed the neutron star X-ray binary 4U 1608-522 during its new outburst (ATel. #851, #855), on July 13, at 4.8 and 8.6 GHz. The observations give no detections with 1-sigma rms of 77 microJy/beam (at 4.8 GHz), 64 microJy/beam (at 8.6 GHz) and of 49 microJy/beam (combining... | 2006-07-16 00:28:00 | radio,x-ray,binary,neutron star,star,transient |
858 | SWIFT XRT Observations of 4U 1608-522 in Outburst | M. V. Greco (Univ. of Michigan), J. M. Miller (Univ. of Michigan), D. Steeghs (SAO) | We report on X-ray observations obtained with the SWIFT-XRT of the neutron star transient 4U1608-522. The source recently went into outburst (ATel #851). Our spectral fits were made using XSPEC v12 on archival Swift/XRT data (observation ID 00030791001). The observation was begun on July 11, 2006 at 21:08:54 UT. Its du... | 2006-07-18 01:26:00 | x-ray,binary,neutron star,star,transient |
859 | Swift Observations of Swift J1933.9+3258: a probable radio-quiet AGN | D. Grupe (PSU), J. Tueller (NASA/GSFC), C. Markwardt (U Md, NASA/GSFC), J. A. Kennea (PSU), A. Falcone (PSU), R. Mushotzky (NASA/GSFC), S. Barthelmy (NASA/GSFC), H. Krimm (NASA/GSFC), W. N. Brandt (PSU), D. Schneider (PSU), M. Ajello (MPE Garching), V. Beckmann (UMBC/NASA/GSFC), T. Belloni (INAF/OAB), O. Godet ... | We report on the Swift observations of the Swift BAT survey source Swift J1933.9+3258. The source was detected in our ongoing Swift Burst Alert Telescope (BAT) hard X-ray survey (Tueller et al. ATEL #668 and #669, Kennea et al. ATEL #677, Ajello et al. ATEL #697). In 9 months of the BAT survey it was detected with a si... | 2006-07-18 23:53:00 | radio,optical,ultra-violet,x-ray,agn,black hole,quasar |
860 | Classification of a Supernova in PGC 70011, a Type II Supernova | The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nuge... | The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of the supernova candidate (CBET #580) in PGC 70011 (z = 0.029314; Ratcliffe et al. 1998, MNRAS, 300, 417), obtained July 20.5 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope, reveals that it is a ... | 2006-07-21 04:17:00 | infra-red,optical,ultra-violet,supernovae |
861 | Swift/BAT detects an outburst from EXO 2030+375 | H. Krimm (GFSC/USRA), S. Barthelmy (GSFC), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), D. Sanwal (GSFC/JHU), J. Tueller (GSFC) | Observations with the Burst Alert Telescope (BAT) on Swift show that the Be/neutron star binary EXO 2030+375 is currently in outburst in the 15-50 keV energy range. The high energy outburst started about June 21, 2006 (MJD 53906) four days after the outburst was first detected by the RXTE All-Sky Monitor (ATel #843, Co... | 2006-07-21 05:02:00 | x-ray,binary,neutron star,star |
862 | Spectroscopic confirmation of the AGN nature of Swift J1933.9+3258 (=1RXS J193347.6+325422) | M. A.P. Torres, D. Steeghs, M. R. Garcia, J. E. McClintock, P. Berlind, P. Zhao (CfA), P. G. Jonker (CfA/SRON), P. J. Callanan (UCC) | We report on optical spectroscopy of Swift J1933.9+3258 (=1RXS J193347.6+325422). This X-ray source has recently been classified as a likely radio-quiet AGN on the basis of its broad-band (radio, optical, UV, X-ray) properties (Grupe et al. 2006, ATel #859). In order to confirm its nature, a single 7-min spectrum of th... | 2006-07-21 21:55:00 | radio,optical,x-ray,agn,black hole |
863 | Type II Supernovae SNF20060719-035 and SN 2006du | The Nearby Supernova Factory: N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, S. Bailey, S. Bongard, M. J. Childress, D. Kocevski, S. Loken, P. Nugent, S. Perlmutter, K. Runge, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laborato... | The Nearby Supernova Factory reports the discovery of two supernovae in images obtained using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking (NEAT) component of the Palomar-QUEST Consortium. Spectra (range 510-1000 nm) of these targets, obtained with the Su... | 2006-07-25 05:52:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
864 | SWIFT/BAT detection of SWIFT J1009.3-4250: a probable Compton-Thick object | M. Ajello, J. Greiner, A. Küpcü Yoldas, (all MPE Garching), J. Tueller (GSFC), S. Barthelmy (GSFC), C. Markwardt (GSFC/UMD), J. A. Kennea (PSU), A. Falcone (PSU), O. Godet (U. Leceister), D. Grupe (PSU), R. Mushotsky(GSFC), T. Belloni (INAF-OAB), K. Mukai (GSFC), S. T. Holland, N. Gehrels (GSFC) | We report the discovery of SWIFT J1009.3-4250, a new hard X-ray source. The source was detected in the ongoing SWIFT Burst Alert Telescope (BAT) survey; as in ATEL #697, BAT data from May-Nov 2005 have been used. The BAT position is (ra,dec)=(152.401,-42.798) and the source significance is 5.1 sigma. SWIFT J1009.3-4250... | 2006-07-25 20:00:00 | optical,x-ray,gamma ray,agn |
865 | Three new INTEGRAL sources: IGR J10043-8702, IGR J10500-6410 and IGR J15283-4443 | A. Paizis (IASF, Milano), D. Gotz (CEA, Saclay), L. Sidoli, S. Vercellone, S. Mereghetti (IASF, Milano) | In the course of a systematic analysis of INTEGRAL archival data, we discovered three new hard X-ray sources, IGR J10043-8702, IGR J10500-6410 and IGR J15283-4443, detected by the IBIS/ISGRI instrument. Each source was visible only in a single pointing (about 2 ksec). The coordinates (J2000, deg), statistical error rad... | 2006-07-25 22:44:00 | x-ray,gamma ray,agn,binary,black hole,cataclysmic variable,neutron star,star,transient,variables |
866 | Asteroid 2005 SB223: no evidence of cometary activity | O. Mousis (Besançon Observatory, France), R. Behrend (Geneva Observatory, Switzerland), O. Lorin (Besançon Observatory, France) | Olivier Mousis, Besançon Observatory, France, imaged the object 2005 SB223 which has a cometary like orbit (q=2.77 UA, e=0.91, i=91°). One hundred R-filtered 30s-images were obtained on 2006-06-01.8 UT when the object was at the heliocentric distance of 3.36 AU, using the 1.0m telescope at Sutherland (SAAO, South-Afr... | 2006-07-26 01:50:00 | optical,asteroid,comet,star |
867 | H.E.S.S. detects historically high fluxes of Very High Energy gamma-rays from PKS 2155-304 | Wystan Benbow (Max-Planck-Institut fuer Kernphysik), Luigi Costamante (Max-Planck-Institut fuer Kernphysik), Berrie Giebels (Laboratoire Leprince Ringuet - IN2P3/CNRS) on behalf of the H. E.S. S. (High Energy Stereoscopic System) collaboration | We report on the H.E.S.S. observations of the blazar PKS 2155-304 at VHE gamma-rays (E>200 GeV) varying between ~40 and ~100% of the Crab flux. On the night of 7/24-25 the source was seen in *preliminary* analyses with a significance of 30 sigma/sqrt(hr), or an average 89% of HESS Crab flux above 200 GeV. On the night ... | 2006-07-27 23:03:00 | gamma ray,vhe,agn,blazar,request for observations |
868 | INTEGRAL Observations of Activity in EXO 2030+375 | M. L. McCollough (CfA), M. Turler (ISDC, Geneva), D. Willis (MPE, Garching / ISDC, Geneva), S. E. Shaw (Southampton, UK / ISDC, Geneva) | The Be/neutron star binary EXO 2030+375 was in the field of view of INTEGRAL from July 26 at 6:00 UT to July 27 at 11:56 UT during a target of opportunity observation of Cyg X-3 consisting of 50 pointings of 2 ksec. The major outburst of the source reported by Corbet & Levine (ATel #843) and by Krimm et al. (ATel #861)... | 2006-07-28 04:29:00 | x-ray,binary,neutron star,star |
869 | new outburst of Aql X-1 | C. Bailyn, E. Neil, D. Maitra (Yale University) | Ongoing optical/IR monitoring of Aql X-1 with the SMARTS 1.3m telescope and ANDICAM instrument at CTIO show a steady rise over the past three days. Our most recent data show that on July 31, UT 5:08 (mid-exposure) the source was at R=17.8, J=16.1, compared to mean quiescent values of R=18.8, J=16.7. These magnitudes in... | 2006-07-31 23:55:00 | infra-red,optical,binary,neutron star,star,transient |
870 | Aquila X-1 is active again | S. A.Ilovaisky, C. Chevalier (Observatoire de Haute-Provence) | CCD images of V1333 Aql, the optical counterpart of the Aquila X-1 recurrent X-ray transient, obtained by D.Gravallon on July 30.88 UT with the 1.2-m telescope at Haute-Provence Observatory, show it has brightened to a level near R=17.6, indicating a new activity cycle has begun. | 2006-08-01 01:38:00 | optical,x-ray,binary,neutron star,star,transient |
871 | A Swift/XRT observation of Aql X-1 during its recent outburst | R. Wijnands (University of Amsterdam), D. Maitra, C. Bailyn (Yale University), M. Linares (University of Amsterdam) | We report on an observation performed with the Swift/XRT of the neutron-star X-ray transient Aql X-1 which was recently found to start a new outburst as inferred from an increase in source luminosity in the R and J band data (ATEL #869, #870). The Swift/XRT observation was performed between 31 July 2006 21:47 and 22:05... | 2006-08-01 22:48:00 | x-ray,binary,neutron star,star,transient |
872 | Correction to ATEL 871: A Swift/XRT observation of Aql X-1 during its recent outburst | R. Wijnands (University of Amsterdam), D. Maitra, C. Bailyn (Yale University), M. Linares (University of Amsterdam) | In ATEL #871 the fluxes were incorrectly quoted. All the fluxes should be multiplied by 1E-10 in order to obtain the correct values. The quoted luminosities are correct since the right fluxes were used to calculate them.
We apologize for any confusion this error might have caused. | 2006-08-02 02:13:00 | x-ray,binary,neutron star,star,transient |
873 | Discovery of three new INTEGRAL sources:IGR J18159-3353,IGR J20188+3647,IGR J21117+3427 | V. Sguera, A. J. Bird, A. J. Dean (Southampton University UK), A. Bazzano, P. Ubertini (IASF/INAF Rome), A. Malizia, N. Masetti (IASF/INAF Bologna) | Discovery of three new INTEGRAL sources:IGR J18159-3353,IGR J20188+3647,IGR J21117+3427 | 2006-08-08 19:28:00 | x-ray,gamma ray,agn,binary,black hole,neutron star,star,transient |
874 | New INTEGRAL source, IGR J17354-3255, and continuation of the INTEGRAL Galactic Bulge monitoring program | E. Kuulkers (ESA/ESAC, Spain), S. Shaw (Southampton, UK/ ISDC, Switzerland), A. Paizis (INAF-IASF, Italy), A. Gros (CEA Saclay, France), J. Chenevez (DNSC, Denmark), C. Sanchez-Fernandez (ESA/ESAC, Spain), S. Brandt (DNSC, Denmark), T. J.-L. Courvoisier (ISDC, Switzerland), A. Domingo Garau (LAEFF/INTA, Spain), K. Ebis... | We performed a re-analysis of all consolidated data of the INTEGRAL AO-3 Galactic Bulge monitoring program (ATel #438; Kuulkers et al. 2006, astro-ph/0603130), and detected a new source with IBIS/ISGRI, which we designate IGR J17354-3255. It was detected in two consecutive 1800 sec pointings from 21 Apr 2006 04:27 to 0... | 2006-08-11 20:10:00 | x-ray,gamma ray,binary,black hole,globular cluster,neutron star,star,transient,variables |
875 | Swift XRT observation of an X-ray burst of 1A 1246-588 | A. K.H. Kong (MIT) | We further analyzed the outburst of the X-ray burster 1A 1246-588 recently detected with Swift on 2006 August 11 (GCN #5436, Romano et al. 2006). Swift XRT began observation 193s after the BAT trigger; the X-ray light curve was clearly fading during the first ~500s and after that, the source count rate remained constan... | 2006-08-13 06:29:00 | x-ray,binary,neutron star,star |
876 | Unexpected change in the spectrum of V4332 Sgr | V. Goranskij (SAI, Moscow University); E. Barsukova, S. Kaisin, and O. Sholukhova (Special Astrophysical Observatory, Russia) | V4332 Sgr (N Sgr 1994 No.1) is a peculiar nova which displayed the spectrum of a cool M supergiant in the outburst. Along with two similar objects, V838 Mon and V1006/7 in M31 it forms a new class of eruptive variable stars. The remnant of this nova has an unusual spectrum containing a cool M7 type star continuum and e... | 2006-08-19 23:54:00 | optical,binary,nova,star,variables |
877 | Detection of a cyclotron line with RXTE in the current outburst of EXO2030+375 | Colleen A. Wilson, Mark H. Finger (NSSTC) | We have regularly monitored the transient Be/X-ray pulsar EXO 2030+375 with pointed RXTE observations since the beginning of its current giant (type II) outburst. As reported by Corbet & Levine (Atel#843) this outburst began in mid June. The flux rose (see Atel#861 and #868) until the end of July to a count rate of 160... | 2006-08-21 06:33:00 | x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
878 | Swift Observations of SN2006ej | P. J. Brown (Pennsylvania State University) & S. Immler (Goddard Space Flight Center, NASA, and Universities Space Research Association) on behalf of the Swift team | We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of SN2006ej (CBET #603). The following UVOT magnitudes were measured for SN 2006ej on Aug 24.83 UT: V = 15.8, B = 16.0, U = 15.4, UVW1 [181-321 nm] = 17.0, UVM2 [166-268 nm] = 18.7, and UVW2 [112-264 nm] = 18.5. Statistical a... | 2006-08-26 03:32:00 | optical,ultra-violet,x-ray,supernovae |
879 | Asteroids (17493) WILDCAT, (22653) 1998 QW2, 2006 FZ51, 2006 GZ42, 2006 HH89: no evidence of cometary activity | Olivier Mousis (Besançon Observatory, France), Raoul Behrend (Geneva Observatory, Switzerland), Olivier Lorin (Besançon Observatory, France), on behalf of the T3 project | The 1.0m telescope at Sutherland (SAAO, South-Afrika) was used to image the objects (17493) WILDCAT, (22653) 1998 QW2, 2006 FZ51, 2006 GZ42, 2006 HH89. All of these asteroids have orbits with a Tisserand parameter close to 3, corresponding to the boundary between asteroidal and cometary orbits (Hsieh and Jewitt 2006 Sc... | 2006-09-01 20:38:00 | optical,asteroid,comet,planet(minor),planet,solar system object,star |
880 | Optical identification of four INTEGRAL sources | Burenin R. (IKI), Mescheryakov A. (IKI), Revnivtsev M. (IKI, MPA), Bikmaev I. (KSU, AST), Sunyaev R. (MPA, IKI) | We report optical spectroscopic identification of four INTEGRAL sources, detected in INTEGRAL all-sky survey (Krivonos et al. 2006). Original astrometric positions of all sources were refined using ROSAT, Chandra or SWIFT/XRT data. Optical data were obtained with Russian-Turkish 1.5-m telescope (RTT-150, Bakirlitepe, T... | 2006-09-05 15:38:00 | optical,x-ray,gamma ray,agn,binary,star |
881 | New X-ray Transients in M31: XMMU J004215.8+411924 and SWIFT J004217.4+411532 | F. Haberl (MPE), W. Pietsch (MPE), J. Greiner (MPE), M. Ajello (MPE) & the collaboration to monitor the supersoft state of optical novae in M31 | A 20 ksec XMM-Newton observation on 2006, August 9 as part of the monitoring program of the X-ray supersoft state of optical novae in the core of M31 (see http://www.mpe.mpg.de/xray/research/normal_galaxies/m31/novae.php ) revealed a new bright transient at R.A.(J2000) = 00:42:15.88, Dec.(J2000) = +41:19:24.4 with a po... | 2006-09-09 05:40:00 | optical,x-ray,binary,black hole,neutron star,nova,star,transient |
882 | The first detection of the bipolar jets from the symbiotic prototype Z And | A. Skopal, T. Pribulla (Astronomical Institute of the Slovak Academy of Sciences, Tatranska Lomnica) | We report on the current major outburst of the symbiotic prototype Z And and the discovery of spectral signatures of collimated bipolar jets observed at/after its optical maximum.
Our UBVRc photometry taken at the Observatories of the Astronomical Institute of the Slovak Academy of Sciences showed a gradual increase i... | 2006-09-14 21:56:00 | optical,binary,cataclysmic variable,star,variables |
883 | Two more nearby AGNs among INTEGRAL sources | R. Burenin (IKI), A. Mescheryakov (IKI), S. Sazonov (IKI, MPA), M. Revnivtsev (IKI, MPA), I. Bikmaev (KSU, AST), R. Sunyaev (MPA, IKI) | We report optical spectroscopic identification of two INTEGRAL sources, detected in the INTEGRAL all-sky survey (Krivonos et al. 2006, in preparation). Optical data were obtained with the Russian-Turkish 1.5-m telescope (RTT-150, Bakirlitepe, TUBITAK National Observatory, Turkey), using the TUG Faint Object Spectrograp... | 2006-09-14 22:22:00 | optical,x-ray,gamma ray,agn |
884 | Possible Nova in M31 | V. Burwitz (Max-Planck-Institut fuer extraterrestrische Physik, MPE), W. Pietsch (MPE), A. Stefanescu (MPE), F. Schrey (MPE), D. Hatzidimitriou (Department of Astrophysics, University of Crete, UOC), P. Reig (UOC), G. Papamastorakis (UOC) | We report the discovery of a possible nova in M31 on an R filter CCD image (2006 September 17.03741, 17.1 mag) obtained at the 1.3m Ritchey Chretien f/7.5 Telescope at Skinakas Observatory, Crete, Greece using the Roper CCD Camera (with a SITE 1k x 1k chip with 24um sq. pixels). The position obtained for the nova candi... | 2006-09-17 22:01:00 | optical,nova |
885 | IGR J17497-2821: a new hard X-ray transient detected by INTEGRAL. | Soldi S., Walter R., Eckert D., Balman S., Bazzano A., Beckmann V., Belloni T., Boggs S., Capitanio F., Chenevez J., Del Santo M., Diehl R., Donnarumma I., Goldoni P., Gotz D., Leyder J.-C., Mereghetti S., Paizis A., Pottschmidt K., Sidoli L., Tarana A., Tueller J., Watanabe K., Weidenspointner G. | During the INTEGRAL Key Programme observations of the Galactic Centre region, the IBIS/ISGRI telescope detected the new hard X-ray transient IGR J17497-2821 at the position ra = 267.4277, dec = -28.3443. The source brightened above 25 mCrab (20-40 keV flux averaged over ~40 minutes) starting from 2006-09-17T00:35 (UTC)... | 2006-09-18 21:49:00 | x-ray,gamma ray,transient |
886 | Further INTEGRAL observations of IGR J17497-2821 | S. Shaw (Southampton, UK/ ISDC, Switzerland), S. Soldi, N. Mowlavi (ISDC, Switzerland), E. Kuulkers (ESA/ESAC, Spain), S. Brandt, J. Chenevez (DNSC, Denmark), T. Courvoisier (ISDC, Switzerland), A. Domingo Garau (LAEFF/INTA, Spain), K. Ebisawa (ISAS, Japan), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (GSFC, USA), T.... | The new INTEGRAL source IGR J17497-2821 (ATel #885) has been clearly detected by IBIS/ISGRI (S/N=33, 20-60 keV) in the INTEGRAL Galactic bulge monitoring program (ATels #438, #874) on 2006, Sep 18, 08:30-12:12 (UT). The source fluxes at 20-60 keV and 60-150 keV are about 45 mCrab and 50 mCrab, respectively, indeed indi... | 2006-09-19 05:08:00 | x-ray,gamma ray,black hole,neutron star,star,transient,variables |
887 | M31 Nova Candidate TSS J004242.3+410846 | R. Quimby (University of Texas) | We report the discovery of an optical transient in M31 from unfiltered CCD images taken on Sept. 18.14 UT (about 16.7 mag) by the 0.45m ROTSE-IIIb telescope at the McDonald Observatory. The object is located at RA = 00h42m42.3s DEC = +41o08'46" (J2000), which is 23.3" west and 7' 22.4" south of the core of M31. TSS J00... | 2006-09-19 06:03:00 | optical,cataclysmic variable,nova,transient,variables |
888 | Broadband INTEGRAL analysis of IGR J17497-2821 | E. Kuulkers (ESA/ESAC, Spain), J. Chenevez (DNSC, Denmark), S. Shaw (Southampton, UK/ ISDC, Switzerland), S. Brandt DNSC, Denmark), T. Courvoisier (ISDC, Switzerland), A. Domingo Garau (LAEFF/INTA, Spain), K. Ebisawa (ISAS, Japan), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (GSFC, USA), N. Mowlavi (ISDC, Switzerland... | We further analysed the INTEGRAL JEM-X observations performed on UT 2006, Sep 18, 08:30-12:12 (ATel #886) of the new hard INTEGRAL source IGR J17497-2821 (ATel #885). We find average fluxes of 31 +/- 10 mCrab and 47 +/- 12 mCrab in the 3-10 keV and 10-25 keV bands, respectively. The best-fit JEM-X position is RA = 267.... | 2006-09-20 21:10:00 | x-ray,gamma ray,binary,black hole,neutron star,star,transient,variables |
889 | IGR J17497-2821: further observations with Swift and INTEGRAL | Roland Walter, Dominique Eckert, Ingo Kreykenbohm, Piotr Lubinski, Stephane Paltani, Nicolas Produit (INTEGRAL Science Dat Centre, Geneva Observatory, Switzerland), Juan Zurita (CEA, Saclay, France) | IGR J17497-2821 (ATel #885) was further observed by INTEGRAL and SWIFT. The source is detected up to 200 keV by INTEGRAL. The ISGRI & JEM-X combined spectrum can be well represented by a powerlaw (index= 1.96+/-0.05) with a low absorption column density (NH<3.5 E22 /cm2) consistent with the galactic value.
The source ... | 2006-09-20 21:18:00 | infra-red,x-ray,gamma ray,nova,transient,request for observations |
890 | IGR J17497-2821: Swift/BAT Detects the New Hard X-ray Transient | H. A. Krimm (NASA GSFC/USRA), S. D. Barthelmy, N. Gehrels (NASA GSFC), C. B. Markwardt (NASA GSFC/U. Maryland), D. Sanwal (NASA GSFC/JHU), J. Tueller (NASA GSFC) for the Swift-BAT science team | The science team for the Burst Alert Telescope (BAT) on Swift confirms the newly discovered galactic transient IGR J17497-2821 (Soldi et al, ATel #885, Walter, ATel #889) in the 15-50 keV band. The source was first observed in the on-state on Sep. 5, 2006 in a 1024 sec observation beginning at 07:38:55 UTC at a count r... | 2006-09-21 04:15:00 | x-ray,transient,variables |
891 | RXTE PCA observations of IGR J17497-2821 | C. B. Markwardt (NASA/GSFC & U. Maryland), J. H. Swank (NASA/GSFC) | The RXTE PCA instrument has observed and detected the transient IGR J17497-2821 (ATEL #885). A pointed observation was taken at 04:20 UTC on Sep 20, 2006, with an exposure of 6.6 ks. The source is detected with a flux of about 35 mCrab (2-10 keV), after accounting for the diffuse and point sources within the PCA field ... | 2006-09-21 05:50:00 | x-ray,binary,transient |
892 | Renewed activity of the very faint X-ray transient CXOGC J174535.5-290124 and continued activity of the neutron-star X-ray transient SAX J1747.0-2853 | R. Wijnands (UvA), E. Kuulkers(ESA/ESAC), M. Muno (Caltech), E. Cackett (U. Michigan), J. in 't Zand (SRON-Utrecht), T. Maccarone, R. Fender (U. Southampton), J. Grindlay (CfA), J. Homan (MIT), M. Rupen (NRAO), R. Cornelisse (IAC), J. Miller-Jones, M. van der Klis (UvA), C. Markwardt (U. Maryland, NASA/GSFC), D. Wang ... | On 8-9 September 2006, a series of 7 XMM-Newton observations were performed as part of our XMM-Newton/Chandra monitoring campaign of the 1.7 square degree region around Sgr A* (Wijnands et al. 2006, A&A, 449, 1117). Two X-ray transients were active during our observations.
A very-faint transient is active with an 2-10... | 2006-09-21 18:58:00 | x-ray,binary,black hole,neutron star,star,transient |
893 | Swift observation of the AXP CXO J164710.2-455216 after a burst | S. Campana (INAF-OAB), G. L. Israel (INAF-OAR) | Swift performed a TOO observation of the anomalous X-ray pulsar (magnetar) CXO J164710.2-455216 in the cluster Westerlund 1 (Muno et al. 2006, ApJ 636 L41) following the burst detected by the BAT (Krimm et al., GCN 5581). This observation started Sep 21 2006, 14:30:02 UT, i.e. 12.4 hr after the BAT event. In the first ... | 2006-09-22 09:32:00 | x-ray,gamma ray,magnetar,neutron star,pulsar,soft gamma-ray repeater,star,transient |
894 | Swift/BAT detects a hard X-ray burst from AXP CXOU J164710.2-455216 | H. Krimm (GSFC/USRA), S. Barthelmy (GSFC), S. Campana (INAF-OAB),J. Cummings (GSFC/UMBC), G. Israel (INAF-OAR), D. Palmer (LANL), A. Parsons (GSFC) on behalf of the Swift-BAT team | The Burst Alert Telescope (BAT) on Swift has detected a faint outburst from the anomalous X-ray pulsar (magnetar) CXOU J164710.2-455216 in the cluster Westerlund 1 (Campana et al, ATEL #893). This pulse was 20 msec long starting at 01:34:52 UTC Sep. 21, 2006 and shows a FRED profile. The best fit position is RA, Dec 25... | 2006-09-22 09:44:00 | x-ray,magnetar,pulsar,transient |
895 | IGR J17497-2821: Additional Optical Counterpart Identifications. | S. Laycock, P. Zhao, M. van den Berg, J. Grindlay, J. Hong., (CfA) | We looked for counterparts for the new Integral/Swift transient IGR J17497-2821 toward the Galactic Bulge on a set of very deep (limiting Vmag~24) optical images taken in 2003 with the CTIO 4m + MOSAIC imager, as part of the ChaMPlane survey. There are 7 stars within the Swift error circle: co-ordinates 17:49:37.8,-28:... | 2006-09-22 10:50:00 | optical,x-ray,binary,neutron star,nova,star,transient |
896 | Update on the Swift observation of the AXP CXO J164710.2-455216 | G. L. Israel (INAF-OAR), S. Campana (INAF-OAB) | We performed a detailed spectral analysis of the whole Swift TOO observation of the anomalous X-ray pulsar CXO J164710.2-455216 in the cluster Westerlund 1 (Muno et al. 2006, ApJ 636 L41, see ATel #893). The final XRT effective exposure time is 7.4 ks in PC mode and 1.3 ks in WT and about 3700+1900 photons are extracte... | 2006-09-22 22:13:00 | x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient |
897 | Infrared observations of IGR J17497-2821: 3 candidate counterparts | S. Chaty (AIM CEA Saclay/University Paris 7, France), Y. Matsuoka (Inst. Astronomy, Univ. Tokyo, Japan), T. Nagata and Y. Ueda (Dept. Astronomy, Kyoto Univ., Japan) | We have obtained infrared (IR) observations in J, H and Ks bands of the field of IGR J17497-2821 (atel #885) at 1.4m IRSF at South African Astronomical Observatory on 3 consecutive nights, respectively starting at 2006-09-22 (UTC 17:47, 18:39 and 20:17), 2006-09-23 (UTC 18:49) and 2006-09-24 (UTC 17:33). The 3-band ima... | 2006-09-26 05:19:00 | infra-red,optical,x-ray,binary,black hole,star,request for observations |
898 | Radio Observations of SN 2006fo | Alicia Soderberg (Caltech) | "I observed the Type Ibc SN 2006fo (IAUC 8750 , CBET 643) with the Very Large Array on Sep 26.2 UT as part of an ongoing program to study the radio properties of SNe Ibc discovered through the SDSS SN survey. SN 2006fo is not detected at 8.5 or 22.5 GHz. At a distance of 88 Mpc, the radio luminosity of SN 2006fo is at ... | 2006-09-27 01:23:00 | radio,supernovae |
899 | Swift follow-up of X-ray transients in M31 | W. Pietsch (MPE), F. Haberl (MPE), J. Greiner (MPE), H. Stiele (MPE) | On 2006, September 11, a 4 ks SWIFT observation of the M31 center field was performed to further monitor the outbursts of the X-ray transients reported in ATel #881. The black hole transient candidate SWIFT J004217.3+411532 dropped in source intensity by 20% compared to the SWIFT observation 10 days earlier. Its X-ray ... | 2006-09-28 00:44:00 | x-ray,binary,black hole,neutron star,star,transient |
900 | IGR J17497-2821: Refined Swift/XRT Analysis | J. A. Kennea (PSU), D. N. Burrows (PSU), J. Nousek (PSU) and N. Gehrels (NASA/GSFC) | IGR J17497-2821 (e.g. Soldi et al., ATEL #885) has been observed by the Swift/XRT on 4 occasions from Sept 19th, 2006 to Sept 26th, 2006, since being initially detected by INTEGRAL on Sept 17th, 2006. We report on a refined analysis of these combined data. Swift/XRT positions for this source previously reported have be... | 2006-09-29 00:11:00 | x-ray,gamma ray,transient |
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