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 |
|---|---|---|---|---|---|
901 | Chandra Target of Opportunity Observations of CXO J164710.2-455216 | F. P. Gavriil (NPP Fellow; GSFC), P. M. Woods (Dynetics), V. M. Kaspi (McGill U.) | The Chandra X-ray Observatory observed the Anomalous X-ray Pulsar CXO J164710.2-455216, which is currently either in or recovering from an outburst (see ATELs #893, #894, #896), on Sept 27 for 15,100 ks starting at 7 UT. The source was observed in continuous clocking mode with the S3 chip on ACIS-S. We collected ~24,50... | 2006-09-29 02:40:00 | x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star |
902 | XMM Observations of AXP CXO J167410.2-455216 Four Days Prior to Outburst | M. Muno (Caltech), B. Gaensler (Sydney), J. S. Clark (OpenU), S. Portegies Zwart (Amsterdam), D. Pooley (Berkeley), R. de Grijs (Sheffield), I. Stevens (Birmingham), and I. Negueruela (Alicante) | The XMM Newton observatory observed the anomalous X-ray pulsar CXO J167410.2-455216 (ATEL #893, #894, #896, #901) on 2006 Sept 16 at 18:58 UT for 45 ks, only 4.3 days before a 20 msec burst observed with the Burst Alert Telescope on Swift (Krimm et al. GCN #5581) apparently initiated an outburst from the source. The pu... | 2006-09-30 04:40:00 | x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star |
903 | Parkes radio observations of the AXP CXO J167410.2-455216 | Marta Burgay (INAF-OAC), Nanda Rea (SRON), Gianluca Israel (INAF-OAR), Andrea Possenti (INAF-OAC) | Next Parkes observation is planned for October 2. | 2006-09-30 22:33:00 | radio,neutron star,pulsar,star,transient |
904 | Announcement of the Swift/BAT Hard X-ray Transient Monitor | H. Krimm (GSFC/USRA), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), D. Sanwal (GSFC/JHU), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) on behalf of th... | The Burst Alert Telescope (BAT) on the Swift satellite is a large field of view instrument that continually monitors the sky to provide the gamma-ray burst trigger for Swift. An average of more than 70% of the sky is observed on a daily basis. These survey mode data in the 15-50 keV energy band are analyzed to derive c... | 2006-10-02 04:57:00 | x-ray,gamma ray,agn,binary,cataclysmic variable,gamma-ray burst,pulsar,quasar,transient,variables |
905 | Detection of the second eclipsing XRB in M33 by Chandra | W. Pietsch (MPE), P. P. Plucinsky (CfA), F. Haberl (MPE), A. Shporer (Wise Obs.), T. Mazeh (Wise Obs.) for the CHASeM33 team | The variable XMM-Newton source [PMH2004] 47 was identified as an XRB candidate by Misanovic et al. (2006, A&A 448, 1247). It coincides with the ROSAT source [HP2001] 19 and was in the field of view of several Chandra CHASeM33 very large project observations of M33 obtained from 2005 November 23 to 2006 September 26. It... | 2006-10-02 22:19:00 | x-ray,binary,black hole,star,variables |
906 | Infrared observations of IGR J17497-2821: new position, new candidate counterparts | Chaty, S. (AIM CEA Saclay/University Paris 7, France), Hatano, H. (Dept. Astrophysics, Nagoya Univ., Japan), Matsuoka, Y. (Inst. Astronomy, Univ. Tokyo, Japan), Nagata, T. (Dept. Astronomy, Kyoto Univ., Japan) | Following the report by Kennea et al. (Atel #900) of a new Swift/XRT position for the recently discovered source IGR J17497-2821 (see Soldi et al., atel #885), we inspected our infrared (IR) images obtained in J, H and Ks bands of the field of IGR J17497-2821 at 1.4m IRSF at South African Astronomical Observatory (deta... | 2006-10-03 07:20:00 | infra-red,x-ray,binary,black hole,neutron star,star,request for observations |
907 | Chandra observes IGR J17497-2821 | A. Paizis (IASF Milano), M. A. Nowak (MIT-CXC), J. Rodriguez (CEA Saclay), J. Wilms (Department of Physics, University of Warwick), T. J.-L. Courvoisier (ISDC Geneva), M. Del Santo, P. Ubertini (IASF Roma), K. Ebisawa (ISAS, Japan) | On October 1st, 17:42 UT, Chandra has performed a 20ksec HETGS observation of the source IGR J17497-2821 recently discovered by INTEGRAL (Soldi et al., ATEL #885). Our preliminary position estimate is (J2000) RA: 17 49 38.04, Dec: -28 21 17.4. As the source is quite bright, the positioning reaches the Chandra absolute ... | 2006-10-03 20:17:00 | radio,far-infra-red,infra-red,optical,x-ray,gamma ray,binary,black hole,neutron star,nova,pulsar,star,transient,variables,a comment |
908 | 16 Supernova Discoveries | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports the discovery of 16 supernovae in images obtained during the month of September, using the QUEST II camera on the Palomar Oschin 48-inch telescope. Images obtained prior to September 20 were acquired in point-and-track mode as a part of the JPL Near-Earth Asteroid Tracking component... | 2006-10-04 04:40:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
909 | On the NIR counterpart to IGR J17497-2821 | M. A. P. Torres, D. Steeghs (CfA), P. G. Jonker (SRON/CfA), C. R. Burns, W. L. Freedman (Carnegie) | We report near-infrared (NIR) observations of the field containing the X-ray transient IGR J17497-2821 (Soldi et al., ATel #885). On 2006 Sep 21 23:34-23:40 UT we acquired Ks-band images with the 6.5m Magellan Baade telescope using the PANIC camera and totaling 225s on source respectively. The images were acquired unde... | 2006-10-04 16:53:00 | infra-red,x-ray,binary,black hole,neutron star,star,transient,variables |
910 | Near-IR observations of the anomalous X-ray pulsar CXO J164710.2-455216 | Z. Wang, V. M. Kaspi (McGill U.), D. Osip, N. Morrell (LCO), D. L. Kaplan, and D. Chakrabarty (MIT) | We observed the field of the AXP CXO J164710.2-455216 on 2006 September 29 at Ks band, using the near-IR imaging camera PANIC (Persson's Auxilliary Nasmyth Infrared Camera) on the Magellan/Baade Telescope at Las Campanas Observatory (LCO) in Chile. The total exposure was 27 min, reaching a limiting magnitude of 20.3 ma... | 2006-10-04 22:02:00 | infra-red,x-ray,binary,pulsar,star |
911 | INTEGRAL observation of Cyg X-1 at a historic hard X-ray maximum | M. Türler (ISDC, Geneva), A. A. Zdziarski (Copernicus A. C., Warsaw), P. Laurent (CEA, Saclay), L. Foschini (IASF, Bologna), J.-P. Roques (CESR, Toulouse), N. Lund (DNSC, Copenhagen), B. McBreen (Univ. College, Dublin), P. Kretschmar (ESA/ESAC, Madrid), N. Gehrels (NASA/GSFC), M. Revnivtsev (IKI, Moscow & MPA, Garchin... | ESA's INTEGRAL mission is regularly observing the persistent black-hole binary Cyg X-1 during monitoring observations of the galactic plane. On 24-26 September 2006 the source was at its highest hard X-ray level since INTEGRAL's launch in October 2002. The two-day long light-curve of this observation shows a more or le... | 2006-10-06 00:11:00 | x-ray,gamma ray,binary,black hole |
912 | Radio Observations of Type Ibc SNe 2006ip and 2006ir | Alicia Soderberg (Caltech) | "I observed the Type Ibc SNe 2006ip and 2006ir (CBET 658, ATEL 908) with the Very Large Array on October 6.1 UT as part of an on-going program to study the radio properties of SNe Ibc discovered through the Nearby Supernova Factory search campaign. Neither SN is detected in our 8.5 GHz observations. Further observation... | 2006-10-08 00:44:00 | radio,supernovae |
913 | Optical modulation of the new eclipsing XRB in M33 | A. Shporer (Wise Obs.), J. Hartman (CfA), T. Mazeh (Wise Obs.), W. Pietsch (MPE) | The variable XMM-Newton source [PMH2004] 47 was recently identified by Pietsch et al. (ATel #905) as an eclipsing XRB with an orbital period of 1.73245 days. Based on its position and color, Pietsch et al. identified star #4571 of Massey et al. (2006, AJ 131, 2478) as the optical counterpart of the X-ray source.
This ... | 2006-10-11 20:13:00 | optical,x-ray,binary,black hole,neutron star,star,variables |
914 | Suzaku observation of IGR J17497-2821 | T. Itoh, M. Kokubun, T. Yuasa, S. Yamada, K. Makishima (Univ. Tokyo), A. Kubota (RIKEN/Japan), H. Takahashi (Hiroshima Univ.), R. Walter (ISDC/Switzerland), T. Takahashi, T. Dotani, K. Ebisawa, S. Naik, T. Anada (ISAS/JAXA), R. Smith (GSFC/NASA), Y. Ueda (Kyoto Univ.), and the Suzaku team | From 2006 Sept 25 7:00 UT through Sept 26 14:14, Suzaku performed a TOO observation of the hard X-ray transient, IGR J17497-2821, which was recently discovered by INTEGRAL (Soldi et al., ATEL #885). A net exposure of ~50 ksec was achieved. As the source is very bright both in the soft X-ray and hard X-ray range, Suzaku... | 2006-10-12 00:20:00 | x-ray,gamma ray,black hole,transient |
915 | Chandra observation of SAX J1818.6-1703: confirmation of optical counterpart & suggestion of non-transient nature | Jean in 't Zand (SRON & Utrecht University), Peter Jonker (SRON, Utrecht University & CfA), Mariano Mendez (SRON & University of Amsterdam) & Craig Markwardt (University of Maryland & NASA-GSFC) | SAX J1818.6-1703, discovered in 1998 with the BeppoSAX Wide Field Cameras (in 't Zand et al. 1998, IAUC # 6840 ), was found with INTEGRAL and RXTE to exhibit few-hours long outbursts similar to the Supergiant Fast X-ray Transients (Grebenev & Sunyaev 2005, AstL 31, 672; Sguera et al. 2005, A&A 444, 221). Negueruela & S... | 2006-10-13 16:29:00 | optical,x-ray,binary,neutron star,star,transient,variables |
916 | Swift Observations of SN 2006jc in UGC 4904 | P. J. Brown, Pennsylvania State University, S. Immler, Goddard Space Flight Center, NASA, and Universities Space Research Association, & M. Modjaz (CfA/Harvard) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of SN 2006jc (CBET 666, 672) began at 2006-10-13 16:10 (UT). The following UVOT magnitudes were measured for SN 2006jc during the first orbit: V = 14.3 (145-s exposure), UVW1 [181-321 nm] = 13.2 (291 s), UVM2 [166-268 nm] =13.5 (362 s), a... | 2006-10-14 08:00:00 | optical,ultra-violet,x-ray,supernovae |
917 | Radio Observations of SN 2006jc | Alicia Soderberg (Caltech) | "I observed the Type Ib SN 2006jc (CBET 666) with the Very Large Array on Oct 14.7 and Oct 15.7 UT as part of an ongoing program to study the radio properties of Type Ibc supernovae. SN 2006jc is not detected at 4.9, 8.5 or 22.5 GHz. At a distance of 24 Mpc, the radio luminosity of SN 2006jc is at least a factor of 100... | 2006-10-19 07:09:00 | radio,supernovae |
918 | Discovery of SNF20061011-000, a Type Ib Supernova | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory report the discovery of supernova SNF20061011-000 (coordinates RA 02:16:59.89 DEC +30:41:57.4 J2000.0) in an image obtained October 11.4 UTC at an approximate magnitude of 19.1 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Eart... | 2006-10-21 06:55:00 | optical,asteroid,supernovae |
919 | Discovery of Supernova Candidate SNF20061019-003 | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports the discovery of a probable supernova SNF20061019-003 (coordinates RA 00:35:27.81 DEC +02:55:50.7 J2000.0) in UGC 348 (z = 0.014, Schneider et al. 1992 ApJS, 81, 5 via NED) in images obtained October 19.3 UT at an approximate magnitude of 16.0 (calibrated to R) using the QUEST II ca... | 2006-10-21 09:40:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
920 | Swift J174540.2-290005.3: Detection of a faint transient near Sgr A* | J. A. Kennea (PSU), R. Wijnands (University of Amsterdam), D. N. Burrows (PSU), J. Nousek (PSU) and N. Gehrels (NASA/GSFC) | Swift/XRT monitoring of the Galactic Center region has detected a faint transient source, Swift J174540.2-290005.3, close to Sgr A*. The source is detected in observations starting on Oct 20th, 2006, and is observed to peak at a flux of 5x10-12 erg/s/cm2 (0.5-10 keV) on Oct 22nd, 2006. Observations of archival data hav... | 2006-10-24 05:00:00 | x-ray,transient |
921 | Swift J174540.2-290005: Updated position and erratum | J. A. Kennea (PSU), R. Wijnands (University of Amsterdam), D. N. Burrows (PSU), J. Nousek (PSU) and N. Gehrels (NASA/GSFC) | Further observations with the Swift/XRT have allowed us to refine the position of the faint Galactic Center X-ray transient Swift J174540.2-290005 (ATEL #920). The new position is as follows: RA(J2000) = 17h 45m 40.1s Dec(J200) = -29d 00m 06.4s with an estimated error radius of 3.6 arcseconds (90% containment). This pl... | 2006-10-25 03:17:00 | x-ray,transient |
922 | Swift Observations of SN2006lc | S. Immler (NASA/GSFC & USRA) and P. J. Brown (PSU), on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of the type Ic SN 2006lc (IAUC 8766 , CBET 693) began at 2006-10-25 13:19 (UT). The following UVOT magnitudes/upper limits (3-sigma) were measured for SN 2006lc in summed images: V = 17.2 (362 s exposure), B = 18.3 (428 s), U = 18.3 (520 ... | 2006-10-26 18:48:00 | optical,ultra-violet,x-ray,supernovae |
923 | HET Spectra of Three Recent Extragalactic Novae | A. W. Shafter (SDSU), E. A. Coelho (SDSU), K. A. Misselt (U. Arizona), M. F. Bode (Liverpool JMU), M. J. Darnley (Liverpool JMU), R. Quimby (U. Texas) | We report optical spectroscopic observations (4280Ã
- 7280Ã
) obtained with the HET of three extragalactic novae: Nova M31 2006 No. 9 (ATEL #887), Nova M32 2006 No. 1 (CBET #591), and Nova M33 2006 No. 1 (CBET #655). The spectra were obtained on 24 Sep 2006 UT, 30 Sep 2006 UT, and 02 Oct 2006 UT, corresponding to appr... | 2006-10-27 05:40:00 | optical,cataclysmic variable,nova,transient,variables |
924 | Radio Observations of SDSS SNe 2006jo and 2006lc | Alicia Soderberg (Caltech) | "I observed the Type Ib SN 2006jo (CBET 680) and Type Ib/c SN 2006lc (CBET 693) with the Very Large Array on Oct 26.1 UT as part of an ongoing program to study the radio properties of Type Ibc supernovae discovered through the SDSS search campaign. Neither SN is detected at 8.5 GHz. Further observations are planned. Th... | 2006-10-29 06:56:00 | radio,supernovae |
925 | Radio Detection of Type Ib SNF20061011 | Alicia Soderberg (Caltech) | "I observed the Type Ib SNF20061011 (ATEL 918) with the Very Large Array on Oct 23.1 UT as part of an ongoing program to study the radio properties of Type Ibc supernovae discovered through the SNF and SDSS search campaigns. The SN is clearly detected at 4.9 and 8.5 GHz with a radio luminosity of about 10^27 erg/cm^2/s... | 2006-10-29 07:08:00 | radio,supernovae |
926 | Discovery of SNF20061024-009, a Type II Supernova | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports the discovery of supernova SNF20061024-009 (coordinates RA 23:26:51.60 DEC +09:19:57.6 J2000.0) in images obtained October 24.2 UTC at an approximate magnitude of 19.4 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth... | 2006-10-31 04:48:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
927 | M31 Nova Candidate TSS J003927.3+405109 | R. Quimby and F. Castro (University of Texas) | We report the discovery of an optical transient in M31 from unfiltered CCD images taken around Oct. 31.09 UT (about 16.4 mag) and Nov 1.08 (about 16.7 mag) by the 0.45m ROTSE-IIIb telescope at the McDonald Observatory. The object is located at RA = 00h39m27.38s DEC = +40o51'09.8" (J2000), which is 37' 0.4" west and 24'... | 2006-11-01 12:45:00 | optical,cataclysmic variable,nova,transient,variables |
928 | Nova V2362 Cygni increases its brightness | Goranskij, V. P., Metlova, N. V. (SAI, Moscow Univ.), and Burenkov, A. N. (Special Astrophysical Observatory, Russia) | Classical nova V2362 Cyg (N Cyg 2006, 23:11:32.34, +44:48:03.9, 2000) undergoes gradual increase of its brightness since middle of August, 2006 from the level of V = 11.9. In October 27, 2006 it has reached V = 11.26. The rate of this brightening is rising during the last week. This development resembles the scenario o... | 2006-11-02 03:44:00 | optical,binary,nova |
929 | The Spin-Down Rate of the Anomalous X-ray Pulsar CXO J164710.2-455216 | P. M. Woods (Dynetics), V. M. Kaspi (McGill U.), F. P. Gavriil (NPP Fellow; GSFC) | We obtained a 15 ks Director's Discretionary observation of the anomalous X-ray pulsar (AXP) CXO J164710.2-455216 with the ACIS-S detector aboard the Chandra X-ray Observatory beginning October 28, 2006 (07:06 UT). The data were obtained in continuous clocking mode. We detected the source clearly and measure a pulse fr... | 2006-11-03 00:02:00 | x-ray,gamma ray,pulsar,soft gamma-ray repeater,transient |
930 | Continuous presence of bipolar jets from Z And during its 2006 outburst | A. Skopal (Astronomical Institute, Slovak Academy of Sciences, Tatranska Lomnica), M. Wolf (Astronomical Institute, Charles University, Prague) | We report on the continuing activity of the symbiotic prototype Z And during its 2006 major outburst that began in 2006 April (cf. ATEL 882). The system still keeps its brightness at a high level (U=9.04, B=9.79, V=9.24, Rc=8.58 as measured on 2006 Oct 26.88 at the Skalnate Pleso Observatory), which is comparable with ... | 2006-11-04 02:18:00 | radio,optical,binary,variables |
931 | The bright new variable in Cassiopeia - a microlensing event? | M. Mikolajewski, T. Tomov, A. Niedzielski, K. Czart, C. Galan - Torun Center for Astronomy, Nicolaus Copernicus University, 87-100 Torun, Poland | We report BV photometry and optical spectroscopic observations of a bright new variable in Cassiopeia, identified as GSC 3656-1328 (CBET # 711, # 712). According to SIMBAD database GSC 3656-1328 is a 11.4 star in V with B-V of about 0.2. Our spectra in the region 3700-7300AA and at a resolution of 4A were obtained with... | 2006-11-04 04:56:00 | optical,microlensing event,star,variables |
932 | Swift/XMM-Newton detection of a large glitch in the bursting transient Anomalous X-ray Pulsar CXO J164710.2-455216 | G. L. Israel and S. Dall'Osso (INAF - AO Roma), S. Campana (INAF - AO Brera), M. Muno (Caltech), and L. Stella (INAF - AO Roma) | Swift observed the initial phases of the AXP CXO J164710.2-455216 outburst at 13 epochs between the 2006 September 21 and October 28 (see also ATel #893 and #896). Our timing analysis of the pulsations of this source included also two XMM-Newton observations carried out 5 days before and 2 days after the burst detected... | 2006-11-04 05:58:00 | radio,x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient |
933 | Swift Observation of SN 2006lt | S. Immler (NASA/USRA/GSFC), P. J. Brown (PSU), and A. Soderberg (Caltech) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of the type Ib SN 2006lt (SNF20061011; ATel #925, CBET #714, IAUC # 8770 ) began at 2006-11-04 00:13 (UT). The following UVOT upper limits (3-sigma) were measured for SN 2006lt in summed images: V > 19.5 (389 s exposure), B >20.5 (389 s),... | 2006-11-05 07:34:00 | optical,ultra-violet,x-ray,supernovae |
934 | Detection of SN 2006jc in X-Rays with Chandra | S. Immler (NASA/USRA/GSFC), M. Modjaz (CfA/Harvard), and P. J. Brown (PSU) on behalf of the Swift satellite team | A Chandra observation of the type Ib SN 2006jc (CBET #666, ATel #916, ATel #917) was performed on 2006-11-04 23:33:00 UT. An X-ray source is detected in the 10.0 ks ACIS-S3 observation at the optical position of the SN, with an offset of <0.5 arcsec, at a 3.0-sigma level of significance. The net count rate of (1.0+/-0.... | 2006-11-06 13:41:00 | optical,ultra-violet,x-ray,supernovae |
935 | Near-IR observations of the X-ray transient Swift J174540.2-290005 in the Galactic Center | Z. Wang (McGill), F. K. Baganoff (MIT), M. Muno (Caltech), M. Morris (UCLA), N. Morrell (LCO), A. Muzzin, D. Gilbank, P. Hsieh (Toronto), D. Kaplan (MIT) | We observed the field of the Galactic center (GC) transient Swift J174540.2-290005 on 2006 October 30 and 31 at Ks band, using the near-IR imaging camera PANIC (Persson's Auxilliary Nasmyth Infrared Camera) on the Magellan/Baade Telescope at Las Campanas Observatory in Chile. The exposures were 3.3 and 6.7 min in the f... | 2006-11-07 21:46:00 | infra-red,x-ray,binary,black hole,neutron star,star,transient |
936 | Follow-up near-infrared observations of IGR J17497-2821 | S. Chaty (AIM CEA Saclay/University Paris 7, France), H. Hatano (Dept. Astrophysics, Nagoya Univ., Japan), Y. Matsuoka (Inst. Astronomy, Univ. Tokyo, Japan), T. Nagata (Dept. Astronomy, Kyoto Univ., Japan) | We report follow-up near-infrared (NIR) observations of IGR J17497-2821 (see Soldi et al. 2006, ATel #885), performed with the 1.4 m IRSF telescope at South African Astronomical Observatory (details on the observations and reduction are given in Chaty et al. 2006, ATel #897). We obtained J-, H- and Ks-band images of th... | 2006-11-08 06:11:00 | infra-red,x-ray,black hole,neutron star,star,transient |
937 | Swift observation of HE 0532-4503 | E. M. Cackett, J. M. Miller (University of Michigan) | Using radial velocity curves from time resolved spectroscopy Geier et al. (2006, astro-ph/0610467) recently identified 4 subluminous B (sdB) stars in close binaries with possible neutron star or black holes. However, none of these sources have any X-ray counterparts in the ROSAT all sky survey, as would be expected if ... | 2006-11-08 07:45:00 | x-ray,binary,black hole,neutron star,star |
938 | Photometry of the Newly-Discovered SU UMa Star in Taurus | A. W. Shafter (SDSU), E. A. Coelho (SDSU), J. K. Reed (SDSU) | We report the results of time-resolved CCD photometry obtained with the Mount Laguna Observatory 1-m reflector of the recently-discovered variable star in Taurus (CBET #701). A total of ~20 hours of V-band photometry over six nights (2006 Oct 28 - 30; 2006 Nov 01 - 03) has enabled us to confirm its tentative identifica... | 2006-11-08 09:58:00 | optical,cataclysmic variable,nova,star,variables |
939 | Three new hard X-ray sources in the Cassiopeia/Perseus region discovered by INTEGRAL | L. Kuiper (SRON), P. R. den Hartog (SRON) and W. Hermsen (SRON, Amsterdam) | In an ultra-deep INTEGRAL exposure (4.1 Ms) on the Cassiopeia region, resulting from the combination of observations performed between December 12, 2003 and January 10, 2006 (INTEGRAL revolutions 142-396), two new hard X-ray sources have been detected: IGR J00335+6126 and IGR J00254+6822. A deep 1.9 Ms INTEGRAL mosaic ... | 2006-11-08 22:53:00 | x-ray,gamma ray,agn,binary,neutron star,quasar,star |
940 | Detection of Additional Periodicities in RXTE ASM Light Curves | Alan M. Levine (MIT MKI) and Robin Corbet (NASA/GSFC and USRA) | We have detected periodicities in the Rossi X-ray Timing Explorer (RXTE) All-sky Monitor (ASM) X-ray light curves beyond those reported by Wen et al. (2006, ApJS, 163, 372). We analyzed data accumulated over nearly 10 years (1996 March through 2005 November) from some 450 sources. Several weighting and filtering techni... | 2006-11-09 23:49:00 | x-ray,binary,black hole,neutron star,pulsar,star |
941 | Optical spectroscopy of putative counterparts of INTEGRAL sources in the Cassiopeia/Perseus region | N. Masetti, L. Bassani, A. Malizia (INAF/IASF, Bologna), A. J. Bird (Univ. Southampton) and P. Ubertini (INAF/IASF, Rome) | On the night between October 1 and 2, 2006, under non-perfect sky conditions (seeing ~2.5 arcsec), we used the instrument BFOSC mounted on the `G.D. Cassini' 1.5m telescope of the Astronomical Observatory of Bologna located in Loiano (Italy) to acquire optical spectra of the putative optical counterparts of sources IGR... | 2006-11-10 00:42:00 | optical,x-ray,agn,star |
942 | VAR CAS 2006, A Nearby Microlens? | D. Spiegel et al. (Columbia U.) | D. Spiegel, J. Patterson, E. Gotthelf, J. Sokoloski, N. Zimmerman, N. Mirabal, Columbia U.; T. Krajci, CBA-New Mexico, R. Koff, CBA-Colorado; P. de Ponthiere, CBA-Lesve; A. Oksanen, CBA-Finland; S. Dong, S. Gaudi, L. Watson, Ohio State U.; R. Remillard, MIT Kavli Institute for Space Research. Time-series photometry of ... | 2006-11-13 03:55:00 | optical,x-ray,microlensing event,nova,star,transient,variables |
943 | Microlensing of GSC 3656-1328 | M. Mikolajewski, T. Tomov, A. Niedzielski, A. Strobel, T. Brozek, K. Czart, C. Galan, A. Karska, E. Swiercznski, M. Wiecek, Torun Center for Astronomy, Nicolaus Copernicus University, Torun, Poland | In our previous report (ATEL#931) we have suggested that the bright optical transient in Cassiopeia, identified as GSC 3656-1328, can be understood as a gravitational microlensing event of a nearby star (see also ATEL#942). All available photometric data support the finding and a symmetric microlens fit best reproduces... | 2006-11-14 23:09:00 | optical,microlensing event,star,transient,variables |
944 | Renewed Low Level X-ray Activity of GX 339-4 | J. H. Swank (GSFC), E. A. Smith (RSIS/GSFC), D. M. Smith (U. C. Santa Cruz), C. B. Markwardt (UMD/GSFC) | Observations with the Rossi X-ray Timing Explorer (RXTE) show that the suspected black-hole binary GX 339-4 has again become active. It was last seen to be X-ray active on 2006 June 14, in decay from a small outburst. At 17:48 UTC on 12 Nov 2006, the Proportional Counter Array (PCA) found, in a 1.3 ks monitoring observ... | 2006-11-15 02:11:00 | radio,x-ray,binary,black hole,the sun,transient,variables,request for observations |
945 | Swift/XRT Detection of the Hard X-ray Sources IGR J18244-5622 and IGR J21178+5139 | R. Landi, N. Masetti (IASF/INAF Bologna), N. Gehrels, J. Tueller (NASA/GSFC), N. Gehrels, J. Tueller ( NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), J. Kennea (PSU), P. Ubertini (IASF/INAF Rome), A. J. Bird (Univ. Southampton) and F. Lebrun (APC/CEA-Saclay) | Two INTEGRAL sources, IGR J18244-5622 and IGR J21178+5139, have recently been observed and detected with the Swift/XRT X-ray telescope.
In the following we report the results of these measurements:
IGR J18244-5622 The XRT observation locates the source at RA = 18 24 19.49, Dec = -56 22 08.72 [J2000] with an error of ... | 2006-11-16 23:41:00 | radio,optical,x-ray,gamma ray,agn,star |
946 | Discovery of SNF20061113-003 and Classification of SN 2006li | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports the discovery of supernova SNF20061113-003 (coordinates RA 02:04:24.02 DEC 09:40:38.2 J2000.0) in images obtained November 13.2 UTC at an approximate magnitude of 19.7 (calibrated to R) using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth... | 2006-11-17 09:13:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
947 | Correction to ATEL #946: Discovery of SNF20061113-003 and Classification of SN 2006li | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports that its previous submission (ATEL #946) contains a typo. The name of the supernova in UGC 3664 classified as Type Ib is named SN 2006li, not SN 2006il. We regret the error. | 2006-11-17 09:43:00 | infra-red,optical,ultra-violet,supernovae |
948 | Optical identifications of two SWIFT sources | A. Mescheryakov (IKI), R. Burenin (IKI), S. Sazonov (IKI, MPA),M. Revnivtsev (IKI, MPA), I. Bikmaev (KSU, AST), R. Sunyaev (MPA, IKI) | We report optical spectroscopic identification of two SWIFT sources SWIFTJ1745.4+2906 and 1RXSJ193347.6+325422. Optical data were obtained with the Russian-Turkish 1.5-m telescope (RTT-150, Bakirlitepe, TUBITAK National Observatory, Turkey), using the TFOSC spectrograph. Both sources were localized by SWIFT/XRT and are... | 2006-11-18 00:32:00 | optical,x-ray,gamma ray,agn |
949 | Millisecond Dips in Sco X-1 are Likely the Result of High-Energy Particle Events | T. A. Jones, A. M. Levine, E. H. Morgan, and S. Rappaport (MIT Kavli nstitute for Astrophysics and Space Research) | Chang et al. (Nature, 442, 7103, 660, 2006) found millisecond duration dips in the X-ray intensity of Sco X-1 and attributed them to occultations of the source by small trans-Neptunian objects (TNOs). We have found evidence that these dips are in fact not astronomical in origin, but rather the result of high-energy cha... | 2006-11-18 02:37:00 | x-ray,cosmic rays,solar system object |
950 | M31 Nova Candidate | WeCAPP: A. Riffeser, S. Geier (University Observatory Munich) | The WeCAPP team discovered a M31 nova (coordinates RA 00:42:44.05 DEC +41:15:02.2 J2000.0) on three 300-sec R-filtered CCD images obtained with the 0.8-m Ritchey-Chretien f/12.4 telescope at Wendelstein Observatory, Germany, using the MONochromatic Image CAmera with a Tektronix (SITe) TK1024 1kx1k chip. Positional unce... | 2006-11-20 21:12:00 | optical,nova |
951 | Spectroscopic identification of the high-amplitude variable star in Leo | A. Rau, E. O. Ofek (both Caltech Optical Observatories), M. Lacy & G. Wilson (both IPAC, Caltech) | We report on follow-up spectroscopy of the high-amplitude variable star in Leo (see Christensen et al., CBET#746) with the COSMIC spectrograph mounted on the Hale-5m telescope at Palomar Observatory. Observations were performed on UT 2006 November 21.55 and covered a wavelength range from 4000 to 8200 Angstrom with a r... | 2006-11-23 09:53:00 | optical,asteroid,star,transient,variables |
952 | Cyg X-3 is in the active state | T. Tosaki (NRO NAOJ), K. Nakanishi (NRO NAOJ) M. Tsuboi (NRO NAOJ), S. Trushkin (SAO RAS), O. Kameya (NAOJ Mizushima) K. Fujisawa (Yamaguchi-U), T. Kotani (Tokyo Tech), N. Kawai (Tokyo Tech) | We report that the microquasar Cyg X-3 (RA=20:32:25.78, Dec=40:57:27.9 J2000) has entered the flaring state and would request for followup observations at all frequencies. In the monitoring program of microquasars with the RATAN-600 radio telescope (Trushkin et al., astro-ph/0611550), the flux density at 4.8 GHz of Cyg... | 2006-11-25 00:22:00 | radio,millimeter,black hole,transient |
953 | INTEGRAL hard X-ray observations of the outburst of the AXP CXOU J164710.2-455216 | D. Gotz (CEA-Saclay), G. L. Israel (INAF-OAR), S. Mereghetti (INAF-IASF Milano), S. Balman (ESA/ESTEC), T. Belloni (INAF-OAB), M. Del Santo, A. Tarana, A. Bazzano, M. Fiocchi (INAF-IASF Roma), C. Ferrigno (INAF-IASF Palermo), J.-C. Leyder (IAG Liege), A. Paizis , L. Sidoli (INAF-IASF Milano), K. Pottschmidt (UCSD... | During the Key Project observations of the Galactic centre region performed in September and October 2006, INTEGRAL covered the position of the transient AXP CXOU J164710.2-455216. The source was inside the IBIS field of view starting from September 21 2006 at 21:07 UT, about 20 hours after the Swift detection of an in... | 2006-11-29 19:07:00 | x-ray,gamma ray,neutron star,pulsar,star,transient |
954 | Radio observations of a type Ia SN 2006X | Poonam Chandra(NRAO/UVa), Roger Chevalier(UVa), Ferdinando Patat(ESO) | We observed the Type Ia supernova SN 2006X (IAUC 8667 ) with the VLA on Nov 17, 2006, 14.26 UT at 4.88 GHz and on Nov 20, 2006, 13.44 UT at 8.44 GHz. The supernova is not detected in either of the observations. The 2-sigma upper limit on the flux density of the SN in 4.88 GHz band is 88 microJy and 68 microJy in 8.44 G... | 2006-11-29 23:29:00 | radio,supernovae |
955 | Detection of Orbital Period in the Wolf-Rayet X-ray Binary IC 10 X-1 | A. H. Prestwich (SAO), R. E. Kilgard (SAO), S. Carpano (ESA), S Saar (SAO), K. Page (Leicester), Andy Pollock (ESA) T. Roberts (Durham), M. Ward (Durham), A. Zezas(SAO) | We detect periodic flux modulations in the Wolf-Rayet X-ray binary IC 10 X-1 using the SWIFT X-ray Telescope and the Chandra X-ray Observatory, with period of 34.82h ± 0.94h. The Local Group dwarf galacy IC 10 was observed twice with Chandra on 2006 2 Nov. and 2006 4 Nov. for apx. 45 ks per observation and has been ob... | 2006-11-30 05:03:00 | x-ray,binary,black hole,neutron star,star |
956 | Swift detection of flares from V711 Tau | H. Krimm (GSFC/USRA), A. Beardmore (U. Leicester), S. Drake (GSFC/USRA), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), G. Sato (GSFC/ISAS), R. Osten (GSFC/UMD), L. Barbier (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), M. Stamatik... | The Swift team reports the detection of three bright hard X-ray flares from the RS CVn binary system V711 Tau (also known as HR 1099). The flares occurred on Nov 29, 2006 and were seen by the Burst Alert Telescope (BAT) on Swift in 64-second exposures starting at 04:30:39, 04:31:43, and 04:33:51 UTC. The intensity of t... | 2006-12-02 07:30:00 | radio,x-ray,binary,star,variables |
957 | Optical spectroscopic identification of candidate counterparts to four INTEGRAL sources | N. Masetti, A. Malizia (INAF-IASF, Bologna), A. J. Dean (Univ. Southampton), A. Bazzano (INAF-IASF, Rome) and R. Walter (ISDC, Versoix) | For the purpose of the identification of their nature, we selected 4 unidentified INTEGRAL sources from the 3rd IBIS catalogue (Bird et al., astro-ph/0611493) for which a single NVSS radio source within the IBIS/INTEGRAL error box is found.
Observations on northern hemisphere sources were performed on 2006 October 2 w... | 2006-12-05 01:42:00 | radio,optical,x-ray,agn |
958 | 34 Supernova Discoveries | The Nearby Supernova Factory: E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Buton, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), G. Aldering, C. Aragon, ... | The Nearby Supernova Factory reports the discovery of 34 supernovae in images obtained during the months of October and November, using the QUEST-II camera on the Palomar Oschin 48-inch telescope. Subsequent spectra of each target (range 320-1000 nm) obtained with the SuperNova Integral Field Spectrograph on the Univer... | 2006-12-06 03:51:00 | infra-red,optical,ultra-violet,asteroid,supernovae |
959 | IGR J06074+2205 is a Be X-ray Binary | J. A. Tomsick (SSL/UC Berkeley and CASS/UCSD), S. Chaty (CEA Saclay), J. Rodriguez (CEA Saclay), R. Walter (ISDC), P. Kaaret (Univ. of Iowa) | The X-ray source IGR J06074+2205 was discovered using data from observations made by INTEGRAL in 2003 February. (Chenevez et al. 2004, ATEL#223). Two different sources in the 2 arcminute INTEGRAL error circle have been suggested as possible counterparts. The first is the radio source NVSS J060718+220452 (Pooley et al. ... | 2006-12-08 03:09:00 | radio,x-ray,binary,black hole,neutron star,star,transient,variables |
960 | A bright flaring state of SS433 | S. Trushkin (SAO RAS), V. Goranskij (SAI Moscow U.), T. Kotani (Tokyo Tech) | We report that the super-critical microquasar SS433 is the flaring state at radio waves and the optical band and would request for followup observations at all frequencies. In the monitoring program of microquasars with the RATAN-600 radio telescope (Trushkin et al., astro-ph/0611550), the flux densities at 1-22 GHz in... | 2006-12-12 21:06:00 | radio,millimeter,optical,x-ray,binary,black hole,transient,request for observations |
961 | SN2006jc unusual infrared outburst | A. Arkharov and N. Efimova (Obs. Pulkovo - Russia); R. Leoni and A. Di Paola (INAF-Obs. Roma - Italy); E. Di Carlo and M. Dolci (INAF-Obs. Teramo - Italy) | We obtained additional near-IR magnitudes (J, H, K) of the SN2006jc (cf. IAUC # 8762 ; CBET #666, #671, #674 and #677; ATEL #916, #917 and #934) with the AZT-24 1.1m telescope and the SWIRCAM camera at Campo Imperatore Observatory (Italy). The values, calibrated using 2MASS catalog, are reported in the following. Photo... | 2006-12-13 18:24:00 | infra-red,supernovae |
962 | INTEGRAL observation of SWIFT J1626.6-5156 | A. Tarana (INAF-IASF/Rome, Italy), A. Bazzano (INAF-IASF/Rome, Italy), J. Chenevez (DNSC, Denmark), M. Falanga (CEA, France), D. Petry (MPE, Germany), T. Belloni (INAF-OAR) | During an INTEGRAL Galactic Plane Scan (GPS) the transient X-ray pulsar SWIFT J1626.6-5156 was observed by IBIS in 4 pointing on 2006-01-21 lasting from 03:05:07 to 05:42:11 (UTC) and by JEM-X in one pointing on 2006-01-21 04:24:54 for 2208 seconds. | 2006-12-14 02:16:00 | x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
963 | Nova V2362 Cygni rapidly changes spectrum | Kimeswenger, S., Dalnodar, S., Knapp, A., Schafer, J., Unterguggenberger, S., Weiss, S. (AI Innsbruck) | V2362 Cygni (N Cyg 2006) had the outburst end March or early April 2006 (Nakano, IAUC 8697 ) and the maximum April, 6th. After a rapid decline (t3 = 19 days) it stopped its decline 4.5 mag below maximum and thereafter re brightened (Goranskij et al. ATEL #928). After V2362 Cygni (N Cyg 2006) concluded it's re brighteni... | 2006-12-15 07:53:00 | optical,nova |
964 | Sudden decay of V838 Mon | V. Goranskij (SAI, Moscow Univ., Russia) | V838 Mon is a peculiar nova having red K-M spectra in its 2002 outburst. It is a member of a new class of eruptive variables of unknown nature. The star was found to be a spectroscopic binary containing a cool L type supergiant, the remnant of the outburst, and a B3V type companion. The spectrum of companion is predomi... | 2006-12-15 10:06:00 | optical,binary,nova,star,variables |
965 | Old nova GK Per in dwarf nova-type outburst | L. Brat (Altan Observatory), R. Hudec, V. Simon, J. Strobl, P. Kubanek, M. Nekola (AI Ondrejov), and M. Jelinek (IAA Granada) | The old nova GK Per is obviously undergoing its rare dwarf nova-type outburst. According to the CCD R band photometry from the Altan Observatory, Pec pod Snezkou, Czech Republic, GK Per has reached an R magnitude about 0.65 mag above the quiescent level. The brightening started around JD 245403135 and since then a cont... | 2006-12-18 23:28:00 | optical,cataclysmic variable,nova,variables |
966 | V838 Mon engulfs its companion | Howard E. Bond (STScI) | In ATel #964 Goranskij reported a sudden fading at blue wavelengths of the peculiar variable star V838 Mon. We report that the fading is confirmed by CCD frames obtained with the Andicam camera on the SMARTS Consortium 1.3m telescope at Cerro Tololo (observers: J. Espinoza & D. Gonzalez). Observations during 2006 are a... | 2006-12-19 02:54:00 | optical,binary,cataclysmic variable,nova,star,the sun,transient,variables,request for observations |
967 | INTEGRAL detection of SWIFT J2037.2+4151 | N. J.Westergaard, C. Budtz-Jorgensen, J. Chenevez, N. Lund, S. Brandt, and C. A.Oxborrow (DNSC, Denmark) | The source detected by SWIFT (ATEL #853) was independently found in archived JEM-X public data in 5 pointings covering 18200s between 2004-07-19, 19:14 UTC and 2004-07-20, 03:27 UTC. Positioned within 1.2 degrees of Cyg X-3 it has been inside the JEM-X field-of-view more than 400 times with an off-axis angle less than ... | 2006-12-19 19:11:00 | x-ray,gamma ray,transient |
968 | Swift-BAT detects a bright hard X-ray outburst from GX 339-4 | H. A. Krimm (GSFC/USRA), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), on behalf of the Swift-BAT team | The Burst Alert Telescope (BAT) on the Swift satellite has detected the suspected black hole binary GX 339-4 at its brightest level since the launch of Swift in November 2004. This source was observed in a series of short exposures beginning at 1:03:57 UT on December 18, 2006 and continuing until 21;57:04 December 18. ... | 2006-12-20 10:16:00 | x-ray,binary,black hole,the sun,transient |
969 | Chandra observations of the M31 transients XMMU J004215.8+411924 and SWIFT J004217.4+411532 | J. L. Galache, M. R. Garcia, M. A.P. Torres, D. Steeghs S. S. Murray, F. A. Primini (CfA) and B. F. Williams (U. of Washington) | We report on 3 Chandra ACIS-I observations containing the two M31 transient X-ray sources announced by Haberl et al. (2006, ATel #881) and followed up by Pietsch et al. (2006, ATel #899). These observations are part of our ongoing Chandra/HST M31 transient program
XMMU J004215.8+411924: This High Mass X-ray Binary was... | 2006-12-21 00:13:00 | x-ray,binary,black hole,neutron star,star,transient |
970 | Fast X-ray transient, IGR J17464-2811 detected with INTEGRAL | S. Brandt, C. Budtz-Jorgensen, J. Chenevez, N. Lund, C. A.Oxborrow, and N. J.Westergaard (DNSC, Denmark) | A fast X-ray transient, possibly a Type-I X-ray burster has been discovered in public INTEGRAL data. The burst occurred at 07:55:33 (UTC) on March 22, 2005, and was detected in the JEM-X X-ray monitor. The position of the source, designated IGR J17464-2811, was determined in the 3-30 keV energy interval to be RA = 266.... | 2006-12-22 22:26:00 | x-ray,binary,neutron star,star,transient |
971 | M31 Nova Candidate | WeCAPP: A. Riffeser, S. Wilke, C. Ries (University Observatory Munich) | We report the discovery of a possible Nova in M31 at JD 2454090.357 (2006, Dez. 20.857 UT) detected with 17.8 mag at a position RA 00:42:21.09 DEC +41:13:45.3 J2000.0 on two 300-sec R-filtered CCD images obtained with the 0.8-m Ritchey-Chretien f/12.4 telescope at Wendelstein Observatory, Germany, using the MONochromat... | 2006-12-23 01:14:00 | optical,nova |
972 | IGR J17464-2811 is XMMU J174716.1-281048 | Rudy Wijnands (University of Amsterdam) | The position of the new fast X-ray transient IGR J17464-2811 (ATEL #970) is consistent with that of the transient XMMU J174716.1-281048 which was active during XMM-Newton observations of this region performed on February 26-27, 2005 (Sidoli et al. 2006, A&A 456, 287). The positional coincidence as well as the closeness... | 2006-12-23 01:51:00 | x-ray,binary,neutron star,star,transient |
973 | M31 Nova Candidate | E. Ovcharov (SU, Sofia), Y. Nikolov (IA, Sofia), Ts. Georgiev (IA, Sofia), A. Valcheva (SU, Sofia), I. Stanev (SU, Sofia), A. Kostov (IA, Sofia), P. Nedialkov (SU, Sofia) | We report the discovery of an apparent nova located at RA(2000) = 00h 42m 43.27s, Dec(2000) = +41° 17' 48.09", which is 11.8" west and 99.6" north of the center of M31. Available R-band magnitudes from 3 180s CCD images taken with the 2m telescope at NAO Rozhen, Bulgaria: December 24.6853, 19.01; 24.7368, 19.00; 24.76... | 2006-12-25 05:24:00 | optical,nova,variables |
974 | A 33 hour period for the Wolf-Rayet/black hole X-ray binary candidate NGC 300 X-1 | S. Carpano (ESA), A. Pollock (ESA), A. Prestwich (SAO), P. Crowther (Univ. of Sheffield), L. Yungelson (INASAN, Moscow), J. Wilms (Univ. of Bamberg), M. Ehle (ESA) | NGC 300 X-1 is the second extragalactic candidate, after IC 10 X-1, for the rare class of Wolf-Rayet/compact object X-ray binary system (Carpano et al. 2007, A&A, 461,9L) uniquely exemplified in the Galaxy by Cyg X-3. From a theoretical point of view, these systems should have orbital periods up to several tens of hour... | 2007-01-10 03:13:00 | x-ray,binary,black hole |
975 | Radio Observations of SN 2007C | Alicia Soderberg (Caltech) | "We observed the Type Ib SN 2007C (CBET 798,800) with the Very Large Array on Jan 11.4 UT as part of an ongoing program to study the radio properties of Type Ibc supernovae. At 8.46 GHz we detect a radio source consistent with the optical SN position. Further observations are planned. The National Radio Astronomy Obser... | 2007-01-12 06:04:00 | radio,optical,supernovae |
976 | Swift Observations of SN 2007C | S. Immler (NASA/USRA/GSFC) and P. J. Brown (PSU) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) started observing the type Ib SN 2007C (CBET #798, CBET #800, ATel #975) on 2007-01-13.3 UT and 2007-01-15.0 UT. The following UVOT magnitudes and upper limits (3-sigma) were measured for these two epochs: V = 15.9, 15.8, (483 s and 447 s exposure tim... | 2007-01-16 04:18:00 | optical,ultra-violet,x-ray,supernovae |
977 | Dynamical Evidence for a Black Hole in the Eclipsing X-ray Binary M33 X-7 | Jerome A. Orosz (San Deigo State University), Jeffrey E. McClintock (CfA), Charles D. Bailyn (Yale), Ronald A. Remillard (MIT), Wolfgang Pietsch (MPI Garching), & Ramesh Narayan (CfA) | We have obtained optical spectroscopy of the counterpart to the eclipsing high-mass X-ray binary M33 X-7 (Pietsch et al 2004, 2006) using the GMOS instrument on the Gemini-North Telescope. We used the B1200 grating (lambda_c=4650 Angstroms) and a 0.5 arcsecond slit rotated to a position angle of 215.6 degrees (which is... | 2007-01-18 05:02:00 | optical,x-ray,binary,black hole,star |
978 | U Gem in Dwarf Nova Outburst | E. Gogus (Sabanci University, Istanbul), T. Guver, M. T. Ozkan (Istanbul University, Istanbul) | Monitoring observations of U Gem with ROTSE-IIId telescope located at TUBITAK National Observatory, Bakirlitepe-Antalya, Turkey reveal that the dwarf nova system is in outburst. U Gem undergoes outbursts once in about 120 days. The V magnitude of the system rises from the quiescent level of about 14 to about 9. Our obs... | 2007-01-18 20:37:00 | optical,cataclysmic variable,nova,variables |
979 | Swift Observations of SN 2007I | S. Immler (NASA/USRA/GSFC) and P. J. Brown (PSU) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) started observing the type Ic SN 2007I (CBET #807, CBET #808) on 2007-01-20.03 UT (V and B bands) and 2007-01-20.08 UT (UVW1 band). The following UVOT magnitudes were measured: V = 17.9 (825 s exposure time), B = 19.2 (797 s), UVW1 [181-321nm] = 19.5 ... | 2007-01-23 04:38:00 | optical,ultra-violet,x-ray,supernovae |
980 | INTEGRAL Campaign on GX 339-4 | J. M. Miller (Univ. of Michigan), E. Kuulkers (ESA/ESAC), M. D. Caballero-Garcia (LAEFF/INTA), M. Diaz Trigo (ESA/ESAC), on behalf of a larger collaboation | The transient black hole binary GX 339-4 is currently in outburst, and slowly rising in both soft and hard X-rays. On Jan 23, 2007 (MJD 54123), the RXTE/ASM recorded a flux of 12.1 cts/sec, which corresponds to 166 mCrab (2-12 keV). On Jan 21, 2007 (MJD 54121) the source flux was 0.096 cts/sec in the Swift/BAT 15-50 ke... | 2007-01-26 02:09:00 | radio,infra-red,x-ray,gamma ray,binary,black hole,transient,request for observations |
981 | Detection of X-Ray Emission from SN 2005kd with Swift | S. Immler (NASA/USRA/GSFC), D. Pooley (UC Berkeley) and P. J. Brown (PSU) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) started observing the type IIn SN 2005kd (IAUC # 8630 ) on 2007-01-24.04 UT. The following UVOT magnitudes were measured: UVW1 [181-321nm] = 18.6 (2,422 s exposure time), UVM2 [166-268 nm] = 19.7 (2,994 s), and UVW2 [112-264 nm] = 19.7 (3,214 s). The ... | 2007-01-26 03:29:00 | optical,ultra-violet,x-ray,supernovae |
982 | Elisa Nespoli, Juan Fabregat (University of Valencia, Spain) and Ronald Mennickent (University of Concepcion, Chile) | K-band Spectroscopy of AX J1841. 0-0536 and IGR J19140+0951 | Spectroscopy in the K band of the AX J1841.0-0536 and IGR J19140+0951 optical/infrared counterparts was obtained on 2006 July 14, using the SofI spectrograph/imager attached to the ESO 3.5m NTT in La Silla, Chile (ESO proposal 077.D-0578(A)). The spectra cover the 2.02-2.28 µm range with a dispersion of 4.62 Ã
/pixel ... | 2007-01-30 19:14:00 | infra-red,optical,x-ray,binary,neutron star,star,transient |
983 | K-band Spectroscopy of AX J1841.0-0536 and IGR J19140+0951 | Elisa Nespoli, Juan Fabregat (University of Valencia, Spain) and Ronald Mennickent (University of Concepcion, Chile) | Resubmission of ATel #982, in which the Authors and Title fields were changed by mistake. Sincere apologies.
Spectroscopy in the K band of the AX J1841.0-0536 and IGR J19140+0951 optical/infrared counterparts was obtained on 2006 July 14, using the SofI spectrograph/imager attached to the ESO 3.5m NTT in La Silla, Chi... | 2007-01-30 19:35:00 | infra-red,optical,x-ray,binary,neutron star,star,transient |
984 | A year of unprecedented flaring activity of the microquasar Cyg X-3 | S. A.Trushkin, N. N. Bursov, N. A. Nizhelskij (SAO RAS) | We report that on 30 Jan 2007 (MJD54130.38) radio fluxes from the microquasar Cyg X-3 (RA=20:32:25.78, Dec=40:57:27.9 J2000) reached 9.35, 11.9, 9.4, 7.0 and 6.2 Jy, at 1.0, 2.3, 4.8, 7.7 and 11.2 GHz respectively, increasingly growing from 6 mJy (4.8 GHz) during last 20 days. We have carried out a daily monitoring pro... | 2007-01-31 04:34:00 | radio,x-ray,binary,black hole,request for observations |
985 | Circinus X-1 -- Return to high radio flaring state | G. D. Nicolson (Hartebeesthoek Radio Astronomy Observatory) | Circinus X-1 has returned to a high radio flaring state last seen during 1975-1985. Observations with the 26-m telescope at the Hartebeesthoek Radio Astronomy Observatory detected strong flares at 3.5 cm wavelength, reaching levels between 180 and 1030 mJy for seven flares observed between 2006 Aug 03 and 2006 Nov 26. ... | 2007-01-31 16:46:00 | radio,x-ray,binary,neutron star,star,transient |
986 | INTEGRAL TOO observations of GX 339-4 | S. Soldi (ISDC, Switzerland), J. Miller (Univ. of Michigan), E. Kuulkers (ESA/ESAC), M. D. Caballero-Garcia (LAEFF/INTA), M. Diaz Trigo (ESA/ESAC), on behalf of a larger collaboration | Quick-look analysis of the first of a series of INTEGRAL ToO observations (ATel #980) shows that GX 339-4 has brightened with respect to the fluxes reported in Atel #980. The source, observed between UT 2007 Jan 30 15:56 and Feb 1 06:11, was detected by both IBIS/ISGRI and JEMX with fluxes of about 380 mCrab, 570 mCrab... | 2007-02-01 23:04:00 | radio,x-ray,gamma ray,binary,black hole,transient,variables |
987 | IGR J16558-4150: a new hard X-ray transient detected by INTEGRAL | S. Soldi (ISDC, Switzerland), S. Shaw (Southampton, UK), J. Miller (Univ. of Michigan), E. Kuulkers (ESA/ESAC), M. D. Caballero-Garcia (LAEFF/INTA), M. Diaz Trigo (ESA/ESAC), on behalf of a larger collaboration | A new hard X-ray transient has been discovered by the imager IBIS/ISGRI on board of INTEGRAL, during the public ToO observation of GX 339-4 conducted between 2007 Jan 30th 15:55 and 2007 Feb 1st 06:11 UTC (ATel #980, #986). The new source, IGR J16558-4150, was detected at the position RA = 253.95 DEC = -41.83, with 3 a... | 2007-02-06 01:08:00 | x-ray,transient,variables |
988 | Swift Observations of SN 2007S | S. Immler (NASA/USRA/GSFC), P. J. Brown (PSU), and P. Milne (U of Arizona) on behalf of the Swift satellite team | Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observed the type Ia SN 2007S (CBET #825, CBET #829) on 2007-02-05.63 UT, 2007-02-05.80 UT, and 2007-02-06.04 UT. The following UVOT magnitudes were measured for these three epochs: V = 15.7 (208 s exposure time), 15.6 (208 s), 15.5 (352 s), B = 16.1 ... | 2007-02-07 01:07:00 | optical,ultra-violet,x-ray,supernovae |
989 | Swift/Chandra refined timing solution for the bursting transient Anomalous X-ray Pulsar CXO J164710.2-455216 | G. L. Israel and S. Dall'Osso (INAF - AO Roma), S. Campana (INAF - AO Brera), and L. Stella (INAF - AO Roma) on behalf of a larger team | The Swift and Chandra satellites observed the AXP CXO J164710.2-455216 on three epochs between 2007 January 19th and February 2nd (at the beginning of the current target visibility window; total exposure time of about 6ks and 20ks for Swift and Chandra, respectively). By means of these additional archival datasets we w... | 2007-02-07 01:40:00 | x-ray,neutron star,pulsar,star,transient |
990 | Swift/XRT observations confirm the AGN nature of IGR J14175-4641, IGR J14552-5133 and IGR J16351-5806 | R. Landi (INAF/IASF Bologna), N. Masetti (INAF/IASF Bologna), N. Gehrels (NASA/GSFC), M. Perri (ASDC), M. Molina (Univ. Southampton), and A. De Rosa (INAF/IASF Rome) | Three INTEGRAL sources, IGR J14175-4641, IGR J14552-5133 and IGR J16351-5806 have recently been observed and detected with the Swift/XRT X-ray telescope. In all cases, the XRT position confirms a previous association with 3 AGNs (Masetti et al., 2006, A&A, 459, 21; Kuiper et al., 2006, Atel 684). In the following we re... | 2007-02-08 01:04:00 | x-ray,gamma ray,agn,star |
991 | Swift/XRT follow-up of IGR J100043-8702, IGR J10500-6410, IGR J05319-6601 and IGR J11321-5311 | R. Landi (INAF/IASF Bologna), J. Kennea (PSU), P. Giommi (ASDC), V. Sguera (Univ. Southampton), and F. Capitanio (INAF/IASF Rome) | The still unidentified INTEGRAL sources, IGR J10043-8702, IGR J10500-6410, IGR J05319-6601 and IGR J11321-5311 have recently been observed with the Swift/XRT X-ray telescope. All sources are extremely variable, with the first two being visible only in a single 2 ks INTEGRAL pointing (Paizis et al., 2006, Atel 865), and... | 2007-02-08 01:24:00 | x-ray,gamma ray,agn,binary,star,variables |
992 | Swift/XRT observations of INTEGRAL detections in the Coma Field | R. Landi (INAF/IASF Bologna), J. Tueller (NASA/GSFC), C. Markwardt (UMD/NASA/GSFC), A. Hill (Univ. Southampton), and M. T. Fiocchi (INAF/IASF Rome) | Four excesses (IGR J11567+3700, IGR J12488+3315, IGR J13371+1520 and IGR J13103+2001) detected by INTEGRAL/IBIS in a deep observation of the Coma region (Krivonos et al., 2005, ApJ, 625, 89) have recently been observed with the Swift/XRT X-ray telescope. Within the 4 arcmin IBIS error box we do not detect any X-ray sou... | 2007-02-08 01:42:00 | x-ray,gamma ray,agn,star |
993 | Large X-ray Burst from Anomalous X-ray Pulsar 4U 0142+61 | F. P. Gavriil (NASA/GSFC), R. Dib, V. M. Kaspi (McGill U.), P. M. Woods (Dynetics) | At approximately 10:04:19 UTC on 7 February 2007 (MJD 54138.42), the Anomalous X-ray Pulsar 4U 0142+61 exhibited a large fast-rise X-ray burst, followed by a lengthy tail, during routine RXTE/PCA monitoring observations. On a 31-ms time scale, the count rate at the burst peak was approximately 3600 counts/s for 2 opera... | 2007-02-08 11:35:00 | radio,infra-red,optical,x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient,request for observations |
994 | The fifth outburst of IGRJ11215-5952 observed with Swift/XRT | P. Romano (IANF-OABrera), L. Sidoli (INAF-IASF Milano), V. Mangano (INAF-IASF Palermo) | IGR J11215-5952 is the first member of the new class of Supergiant Fast X-ray Transients which displays periodic outbursts, with a recurrence time of 329 days (Sidoli et al. 2006,A&A,450,L9; Smith et al.2006,ATEL #766), likely indicative of the orbital period of the binary system.
Based on this periodicity, we are per... | 2007-02-08 22:20:00 | x-ray,binary,transient,request for observations |
995 | Bright Outburst from IGRJ11215-5952 observed with Swift/XRT | V. Mangano (INAF-IASF Palermo), P. Romano (INAF-OABrera), L. Sidoli (INAF-IASF Milano) | IGR J11215-5952 is undergoing a new periodic outburst as observed with Swift/XRT (Romano et al. ATel #994, where the early phase of the outburst has been reported).
During subsequent observations with Swift/XRT, IGRJ11215-5952 has been observed to undergo a bright flare, starting on 9 February (01:30 UT) and reaching ... | 2007-02-09 20:22:00 | x-ray,binary,transient,request for observations |
996 | Light curve of IGRJ11215-5952 observed with Swift/XRT | V. Mangano (INAF-IASF Palermo), P. Romano (INAF-OABrera), L. Sidoli (INAF-IASF Milano) | The light curve of the IGRJ11215-5952 outburst observed by Swift/XRT on 2007 Feb 09 (Mangano et al. ATel #995) can be found at the following link. | 2007-02-09 20:44:00 | x-ray,binary,transient,request for observations |
997 | Pulse period of IGRJ11215-5952 from Swift/XRT data | L. Sidoli, S. Mereghetti, S. Vercellone (INAF-IASF Milano), V. Mangano, G. Cusumano (INAF-IASF Palermo), P. Romano (INAF-OABrera) | Swift/XRT is performing a monitoring of the new outburst of the supergiant fast X-ray transient IGRJ11215-5952 (Romano et al., ATel #994; Mangano et al., ATel #995).
A timing analysis of the February 9 observation confirms the possible pulsation suggested by Smith et al. 2006 (ATel #773) from the analysis of the previ... | 2007-02-10 02:23:00 | x-ray,binary,transient,request for observations |
998 | Swift observation of the AXP 4U 0142+61 following a bright X-ray burst | S. Campana (OA Brera), S. Patel (NASA/MSFC), G. L. Israel (OA Roma), N. Rea (Sron), C. Kouveliotou (NASA/MSFC) | Following the bright X-ray burst reported by Gavriil et al. (2007, ATel #993), Swift observed the anomalous X-ray pulsar 4U 0142+61 on Feb. 8th 2007 (36.7 hr after the burst). The XRT instrument collected 4844 s in Photon Counting (PC) mode and 138 s in Window Timing (WT) mode. The source is well detected at a piled-up... | 2007-02-10 06:32:00 | x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star |
999 | RXTE PCA Pointed Observations of IGR J11215-5952 | J. H. Swank (NASA/GSFC), D. M. Smith (U. C. Santa Cruz), C. B. Markwardt (CRESST/U. Md./NASA/GSFC) | RXTE has performed pointed observations of IGR J11215-5952 on Feb 6, 7, 8, 9 and 10, 2007, at various times, for a total exposure of 23.3 ks.
During the observations of Feb 6-8, the source was mostly quiescent. However, in the observations on Feb 9, 01:20 - 03:20 UTC, the source exhibited strong pulsations. Using a Lo... | 2007-02-11 07:24:00 | x-ray,binary,pulsar,transient |
1,000 | INTEGRAL observations of GX339-4: preliminary spectral fit results | M. D. Caballero-Garcia (LAEFF/INTA), J. Miller (Univ. of Michigan), E. Kuulkers (ESA/ESAC), M. Diaz Trigo (ESA/ESAC), on behalf of a larger collaboration | We present the results of preliminary spectral fits to the first 130 ksec INTEGRAL ToO observation of GX 339-4 (see ATel #980, #986), obtained between 2007, Jan 30, 15:56 and Feb 01, 06:11. We made joint spectral fits to spectra obtained with the JEM-X (5-20 keV) and IBIS/ISGRI (23-300 keV) instruments.
The model that... | 2007-02-11 18:48:00 | binary,black hole,transient,variables |
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