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 |
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401 | Type determination for SN 2005L | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, J. Siegrist, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), G. Adam, R. Bacon, C. Bonnaud, L. Capoani, D. Dubet, F. Henault, B. Lantz, J-P. Lemonnier, A. Pecontal, E. Pecontal (Centre de Re... | A spectrum (range 330-990 nm) of SN 2005L in MCG+07-33-5 (IAUC # 8469 ), obtained Jan 27.64 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, reveals it to be a very peculiar type Ia supernova possibly one to two weeks past maximum. Assuming a host redshift from the Sloan Dig... | 2005-01-28 06:54:00 | optical,supernovae |
402 | Optical observations of the X-ray Transient XTE J1118+480 | C. Zurita (IAC), P. RodrÃguez-Gil (IAC), J. Casares (IAC), T. Muñoz-Darias (IAC), M. A. P. Torres (CfA), T. Shahbaz (IAC) | Time resolved (40-sec resolution, ~6-hours per night), R-band photometry of the outbursting black hole candidate XTE J1118+480 (ATEL #383) was obtained with the European Space Agency, 1-m OGS telescope at the Spanish Observatorio del Teide (Tenerife) from 2005 Jan 21.01 to Jan 26.30. The average R-band magnitude displa... | 2005-01-29 02:36:00 | optical,x-ray,binary,black hole,transient |
403 | ROTSE-III detection of optical outburst of 2QZ J142701.6-012310 | E. Rykoff (UMich) on behalf of the ROTSE collaboration | Online analysis of ROTSE-III sky patrol fields for new transients has revealed an outburst of 2QZ J142701.6-012310. The object was detected at m_R=15.1 on 23 January 2005, and was dimmer than m_R=18.0 on 21 January. This object had been labeled as a potential blazar by the 2dF survey, although the survey had not been a... | 2005-01-29 06:48:00 | optical,agn,blazar,cataclysmic variable,transient,variables |
404 | Recent VLA radio observations of XTE J1118+480 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | We report further Very Large Array (VLA) observations of the continuing outburst of the black hole candidate binary XTE J1118+480 (e.g., ATEL #399, ATEL #400, ATEL #402). Our most recent observation (31 January 2005, MJD 53401.306) showed a 1.4+/-0.1 mJy source at 8.46 GHz. Multi-frequency observations taken on MJD 533... | 2005-02-03 05:32:00 | radio,x-ray,binary,black hole,transient |
405 | Binary period in Optical counterpart to XMMU J004723.7-731226 (SXP 264) | W. R.T. Edge, M. J. Coe and J. L. Galache (Southampton University) | A probable binary period has been detected in the optical counterpart to the X-ray source XMMU J004723.7-731226 = RXJ0047.3-7312 = AXJ0047.3-7312= SXP 264 in the Small Magellanic Cloud. This source has been identified with the emission line star [MA93]172 and is coincident with Optical Gravitational Lensing (OGLE) obje... | 2005-02-06 02:03:00 | optical,x-ray,binary,gravitational lensing,pulsar,star,transient |
406 | Type determination for SN 2005Z and SN 2005aa | Avishay Gal-Yam (Caltech) | Avishay Gal-Yam reports for the CCCP: A. Soderberg and D. Fox have obtained spectra of the unidentified supernovae SN 2005Z and SN 2005aa, using the double spectrograph mounted on the Palomar Observatory 200" Hale telescope, on Feb. 6, 2005, UT. Preliminary analysis reveals that SN 2005Z (Khandrika, Park, Graham, and L... | 2005-02-07 04:22:00 | optical,supernovae |
407 | Spin and Pulsed X-ray Flux Properties of SGR 1806-20 after the Giant Flare | Peter M. Woods (USRA/NSSTC), Chryssa Kouveliotou (MSFC/NSSTC), Ersin Gogus (Sabanci Univ), Mark Finger, Sandy Patel (USRA/NSSTC), Jean Swank (NASA/GSFC), and Kevin Hurley (UCB) | The Soft Gamma Repeater SGR 1806-20 emitted a giant flare that was recorded on 2004 December 27 (GCN 2920). We triggered an ongoing sequence of ToO observations of the SGR with RXTE that began on 2005 January 22, the earliest RXTE could observe due to Sun-angle constraints. We find no evidence for a sudden change in sp... | 2005-02-08 07:04:00 | x-ray,gamma ray,neutron star,soft gamma-ray repeater,star,the sun |
408 | Type Determination for SN 2005ac | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, J. Siegrist, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), G. Adam, R. Bacon, C. Bonnaud, L. Capoani, D. Dubet, F. Henault, B. Lantz, J-P. Lemonnier, A. Pecontal, E. Pecontal (Centre de Re... | A spectrum (range 330-990 nm) of SN 2005ac in SDSS J133955.93+005217.1 (Burket and Li, IAUC # 8478 ), obtained on Feb 10.65 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, reveals it to be a Type Ia supernova approximately one week past maximum light. The supernova is simil... | 2005-02-11 04:22:00 | optical,supernovae |
409 | XMM-Newton observation of M101 ULX-1 | A. K.H. Kong (MIT) | We report XMM-Newton TOO observation of the recent outburst of M101 ULX-1 (CXOU J140332.3+542103; ATEL #374). The observation was taken on 8 January 2005 with an exposure time of 32 ks. With about 20 ks useful data, there are about 1200 counts in EPIC-pn for spectral fitting. The spectrum is very soft and there is no s... | 2005-02-11 08:52:00 | x-ray,binary,black hole,variables |
410 | Seyfert 2 VV 780 detected with INTEGRAL | Emrah Kalemci (SSL/UCB), Steven E. Boggs (SSL/UCB), Niels Lund (DNSC) | The analysis of the ISGRI / INTEGRAL data of SN 1006 observations yielded an unknown catalog source located at RA=14h57m31s, DEC=-43d10m11s. The source is detected with 8.7 sigma in 20-40 keV band in the mosaic image covering all SN 1006 observations taken in Jan 2004, revolutions 155, 156, 157 and 158 with ~700 ks of ... | 2005-02-16 02:05:00 | x-ray,gamma ray,agn,black hole,variables,request for observations |
411 | Discovery and Type Identification for New Supernova | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut... | The Nearby Supernova Factory reports the discovery of a supernova, SNF20050203-000, with NEAT images taken on the Palomar Oschin Schmidt telescope Feb. 3.45 UT as part of the Palomar-QUEST Survey. At discovery the supernova had an unfiltered magnitude of 18.0. It is located at RA = 10:24:12.9, Dec = -03:44:50.6 (J2000)... | 2005-02-16 06:57:00 | optical,supernovae |
412 | The Second Optical Outburst of XTE J1118+480 | Y. Chou (National Central University), A. Chen (National Cheng Kung University), P. S. Chiang (National Cheng Kung University), C. P. Hu (National Central University), R. H. Hu(National Central University) | We report the results from our continuous monitoring of the outbursting black hole X-ray transient XTE J1118+480 (KV UMa, ATEL #383, #384, #385, #386, #387, #389, #393, #399, #402, #404) made by Lulin One-meter Telescope (LOT), Taiwan. After about a month declining to V=17.4, its optical flux was found rising again on ... | 2005-02-18 14:40:00 | optical,x-ray,binary,black hole,transient |
413 | GRO J1008-57 Brightening | Jean Swank (GSFC) for the RXTE team | The transient pulsar GRO J1008-57 may be starting an outburst. On Feb 18.00, the ASM on the Rossi X-Ray timing Explorer (RXTE) detected a flux of 36(3) mCrab. The source first spent a week, starting on Feb 6, at a level of 5 mcrab; it then rose to 20 mcrab on Feb 15. The ASM hardness ratio HR2 is 2.0(0.3), consistent w... | 2005-02-19 08:06:00 | x-ray,gamma ray,binary,pulsar,star,transient |
414 | New Outburst of GRO J1655-40? | C. B. Markwardt (U. Maryland & NASA/GSFC) & J. H. Swank (NASA/GSFC) | RXTE PCA bulge scan observations on 2005 Feb 17.99 (UT) have detected emission consistent with coming from the black hole transient GRO J1655-40. The flux in the 2-10 keV band was 4.1 +/- 0.6 mCrab. The source was not detected in a previous observation on Feb 10.77 (2-10 keV flux measurement of 0.3 +/- 0.3 mCrab).
A d... | 2005-02-20 05:15:00 | x-ray,binary,black hole,transient,request for observations |
415 | GRO J1655-40 Flux is Rising (Slowly) | C. B. Markwardt (U. Maryland & NASA/GSFC), E. Smith & J. H. Swank (NASA/GSFC) | Dedicated RXTE/PCA scans of the region around GRO J1655-40 (ATEL #414) were performed on Feb 20 around 09h UT.
The scans show only one source in the region, whose position is consistent with GRO J1655-40 to within 4 arcmin (2.5 sigma). The 2-10 keV flux has risen to approximately 8 mCrab (compare to 4 mCrab on Feb 18,... | 2005-02-21 04:11:00 | x-ray,binary,black hole,pulsar,transient |
416 | The orbital period of CI Cam (XTE J0421+560) | E. A. Barsukova, N. V. Borisov, A. N. Burenkov, V. G. Klochkova (Special Astrophysical Observatory, Russia), V. P. Goranskij, N. V. Metlova (Sternberg Astronomical Institute, Moscow University) | CI Cam is a known B[e] star and X-ray transient. We perform photometric and medium-resolution spectroscopic monitoring of CI Cam in the quiet state during 7 years since April 1998 outburst. We have detected orbital light variations with the period of 19.41+/-0.02 day. The modulation has an amplitude of 0.032 mag in V b... | 2005-02-21 04:40:00 | optical,x-ray,binary,star,transient,variables |
417 | A NIR Observation of GRO J1655-40 | M. A.P. Torres (CfA), D. Steeghs (CfA), P. Jonker (SRON), P. Martini (CfA) | Following ATEL #414, on February 20.39 UT we acquired a J-band image of the X-ray transient GRO J1655-40 using the PANIC camera on the 6.5-m Magellan-Baade telescope at Las Campanas Observatory. Preliminary relative photometry with respect to ten 2MASS nearby stars yields J=13.2 +/- 0.1, indicating that GRO J1655-40 is... | 2005-02-21 11:05:00 | infra-red,x-ray,binary,black hole,star,transient,request for observations |
418 | Optical and NIR observations of GRO J1655-40 | Michelle Buxton, Charles Bailyn, Dipankar Maitra (Yale University) | In response to the recent report of renewed activity in GRO J1655-40 (ATEL #414), we have obtained B, V, I, J and K-band images using the ANDICAM instrument on the SMARTS 1.3m telescope at CTIO. On UT Feb 21.3-21.4 we measure the following magnitudes: B = 18.5, V = 17.0, I = 14.9, J = 13.4, K = 12.4. In comparison to t... | 2005-02-22 03:09:00 | radio,infra-red,optical,binary,black hole,transient |
419 | Radio detection of GRO J1655-40 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | We report the detection of renewed radio activity associated with the black hole X-ray binary GRO J1655-40, currently undergoing an X-ray (ATEL #414; ATEL #415) and optical/infrared (ATEL #417, ATEL #418) flare. Very Large Array (VLA) observations taken on Feb. 20th (MJD 53421.6) under poor weather conditions clearly d... | 2005-02-22 03:44:00 | radio,optical,x-ray,binary,black hole,transient |
420 | No radio re-flare in XTE J1118+480 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | We report recent radio observations of the X-ray binary XTE J1118+480, recently reported as undergoing a second optical outburst (ATEL #412) following a more impressive optical (ATEL #383, ATEL #386, ATEL #393, ATEL #399, ATEL #402), X-ray (ATEL #384, ATEL #390), and radio (ATEL #385, ATEL #387, ATEL #400, ATEL #404) f... | 2005-02-22 04:08:00 | radio,optical,x-ray,binary,black hole,transient |
421 | Discoveery of a nova in M31 | A. Dimai (Col Druscié Observatory, Italy), F. Manzini (Stazione Astronomica di Sozzago, MPC code A12, Italy) | Marco Migliardi, Col Drusciè Observatory (Italy), report the discovery of an apparent nova in M31 (NGC 224) on behalf of the CROSS Program with the 0.5-m telescope of the Col Drusciè Observatory. The possible nova was found on unfiltered CCD images (Kodak KAF-1602E CCD) taken on February 18.77 (mag. 17.7), and confir... | 2005-02-22 16:00:00 | optical,nova,planet,star,variables |
422 | INTEGRAL observation of GRO J1655-40 | N. Produit (ISDC), S. Shaw (ISDC), P. Jean (CESR),K. Kretschmer(MPG) | During INTEGRAL observations of the Galactic Disk, the superluminal source GRO J1655-40 was observed with the ISGRI detector. The source was detected in 5 ~2000second long pointings between 2005-02-18 and 2005-02-19 at a flux between 3 and 4 cps in the 20-50 keV band (corresponding to approx 30mCrab). This measurement ... | 2005-02-22 23:49:00 | gamma ray,binary,star,transient,variables |
423 | Discovery of CV ROTSE3 J100932.2-020155 | E. Rykoff (U. Mich.) and R. Quimby (U. Texas) on behalf of the ROTSE collaboration | Online analysis of ROTSE-III sky patrol fields reveals a new CV we designate ROTSE3 J100932.2-020155. The object was first detected on 20 Jan 2005 by the ROTSE-IIIb telescope at McDonald Observatory, Texas at an unfiltered magnitude m_R = 14.3. It has since stayed brighter than m_R=15 and has been imaged by ROTSE-IIIa ... | 2005-02-23 00:33:00 | optical,cataclysmic variable,nova,quasar,transient,variables |
424 | New Optical Observations of XTE J1118+480 | C. Zurita, T. Muñoz-Darias, I. G.MartÃnez-Pais, J. Casares, P. RodrÃguez-Gil, T. Shahbaz (Instituto de AstrofÃsica de Canarias) and M. A.P. Torres, P. Zhao, D. Steeghs, M. R. Garcia (Harvard-Smithsonian Center for Astrophysics) | We report on new R-band photometry of the outbursting black hole candidate XTE J1118+480 (ATEL #383, #384) obtained with the 4.2m WHT at the Observatorio del Roque de los Muchachos (La Palma) and with the FLWO 1.2m telescope on Mt. Hopkins. We measure the following average magnitudes: Feb 20.19 (UT), R=16.94 +/- 0.06; ... | 2005-02-23 08:48:00 | optical,x-ray,binary,black hole,transient |
425 | Radio holding steady in GRO J1655-40 | M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan(NRAO) | Very Large Array (VLA) observations of the black hole X-ray binary GRO J1655-40 on Feb. 23rd (MJD 53424.6) show that the radio source seen on Feb. 20th (ATEL #419) has remained roughly constant, with flux densities of 1.53 +/- 0.07 mJy at 4.86 GHz, and 1.45 +/- 0.08 mJy at 8.46 GHz. These data, taken in much better wea... | 2005-02-24 06:17:00 | radio,x-ray,binary,black hole,transient |
426 | Binary period in Optical counterpart to CXOU J005455.6-724510 = RXJ0054.9-7245 = AX J0054.8-7244 = SXP504 | W. R.T. Edge, M. J. Coe, J. L. Galache and V. A. McBride (Southampton University), R. H.D. Corbet (GSFC and USRA), C. B. Markwardt (GSFC and University of Maryland), S. Laycock (CfA), F. E. Marshall (GSFC) | A probable binary period has been detected in the optical counterpart to the X-ray source CXOU J005455.6-724510 = RX J0054.9-7245 = AXJ0054.8-7244 = SXP504 in the Small Magellanic Cloud. This source was detected by Chandra on 04 Jul 2002 (MJD 52459) and first reported in ATEL#217. It was subsequently observed by XMM-Ne... | 2005-02-25 02:17:00 | optical,x-ray,binary,gravitational lensing,pulsar,transient |
427 | Type determination for SN 2005ak | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005ak (CBET #110), obtained Feb 25.66 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, shows it to be a type Ia SN just before maximum light. Assuming a host redshift of z =0.027 from NED and SDS... | 2005-02-26 03:17:00 | optical,supernovae |
428 | XTE J1118+480 near Quiescence | C. Zurita, J. Casares, T. Muñoz-Darias, P. RodrÃguez-Gil, I. G. MartÃnez-Pais, T. Shahbaz (Instituto de AstrofÃsica de Canarias) and M. A. P. Torres, P. Zhao, D. Steeghs, M. R. Garcia (Harvard-Smithsonian Center for Astrophysics) | Following our optical monitoring of the halo black-hole candidate XTE J1118+480 (ATELs #383, #402, #424), we have obtained time-resolved R-band photometry with the ESA 1-m OGS telescope at the Spanish Observatorio del Teide and with the FLWO 1.2m telescope on Mt. Hopkins. Our observations show that the source has settl... | 2005-02-28 10:16:00 | optical,binary,black hole,transient |
429 | Optical counterpart to IGR J16465-4507 | Ignacio Negueruela (Alicante), David M. Smith (U. C. Santa Cruz), Sylvain Chaty (CEA-Saclay) | Intermediate resolution spectra of the only star in the XMM-Newton error box for IGR J16465-4507 (ATel #329, #336), USNO-B1.0 0448-00520455 = 2MASS J16463526-4507045, have been taken with the 3.5-m NTT, in La Silla (ESO proposal 274.D-0510). As anticipated in ATel #338, the star is a reddened early-type supergiant and ... | 2005-03-01 01:56:00 | optical,x-ray,binary,neutron star,star,transient |
430 | Type determination for SN 2005al | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005al (IAUC # 8488 ), obtained Feb 28.54 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, shows it to be a type Ia SN, most likely near maximum light. Assuming a host redshift of z =0.0124 from N... | 2005-03-01 03:54:00 | optical,supernovae |
431 | Type Refinement for SN 2005U in Arp 299 | D. C. Leonard and S. B. Cenko (Caltech) | D. C. Leonard and S. B. Cenko report on behalf of the CCCP that a prelinarily reduced spectrum (range 5500 - 9500 A) of the previously identified Type II SN 2005U (Mattila et al., IAUC # 8473 ; Modjaz et al., IAUC # 8475 ) obtained using the double spectrograph mounted on the Palomar Observatory 200" Hale telescope, on... | 2005-03-01 07:01:00 | optical,supernovae |
432 | INTEGRAL follow-up of GRO J1655-40 | I. Brott (ISDC/Hamburg Observatory), J. Swank (GSFC), N. Mowlavi (ISDC, Geneva Observatory), C. Shrader (GSFC/USRA) | A Target Of Opportunity observation of the X-ray binary GRO J1655-40 was triggered with INTEGRAL from 2005 February 24, 05h30 UTC to February 28, 12h30 UTC.
The source was detected in the ISGRI instrument with a significance of about 15 sigma. The Quick Look Analysis (QLA) found the flux slowly increased during the fi... | 2005-03-01 20:08:00 | x-ray,gamma ray,binary,black hole,transient |
433 | Continued RXTE observations of GRO J1655-40 | J. Swank (GSFC) and C. Markwardt (UMD/GSFC) | GRO J1655-40 has been observed with the RXTE pointed instruments each day during Feb 21-Mar 1. The flux has risen only slowly during this period: The 2-10 keV and 10-60 keV flux fluxes on Feb 21.9 were 8.4 and 16.7 mCrab, respectively, and on Feb 27.9 were 17.1 and 36.1 mCrab. During a period of 3 hr Feb 27.96-28.10 th... | 2005-03-01 21:12:00 | x-ray,binary,black hole,transient |
434 | Continued slow radio rise of GRO J1655-40 | M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan (NRAO) | We report further Very Large Array (VLA) observations of the black hole X-ray binary GRO J1655-40. Data taken on Feb. 27th from 11:40 through 13:40 UT (during the X-ray plateau seen by INTEGRAL [ATEL #432] and RXTE [ATEL #433]) show the radio source steady to within 10%, with flux densities of 1.86 +/- 0.17, 1.80 +/- 0... | 2005-03-01 23:41:00 | radio,x-ray,binary,black hole,transient |
435 | Type Determination for SN in ESO 506-G011 | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of the supernova in ESO 506-G011 (Weidong Li, private communication), obtained Mar 4.46 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a very young Type II. The spectrum is very blue a... | 2005-03-05 01:39:00 | optical,supernovae |
436 | GRO J1655-40 Rising Again | C. Markwardt (U. Maryland & NASA/GSFC), J. Homan (MIT), J. Swank (NASA/GSFC) | RXTE has continued to observe GRO J1655-40 since Mar 1 (ATEL #433). The X-ray flux reached an intermediate low point on Mar 2 (19-22 mCrab, 2-10 keV), and has since been rising, with fluxes of 27, 29, 39 and 44 mCrab on Mar 3.8-4.0, 4.0-4.1, 4.9-5.1, 5.7, respectively (UT). Occasional dipping behavior is still present,... | 2005-03-07 01:39:00 | x-ray,binary,black hole,transient |
437 | Complex evolution of radio spectrum in GRO J1655-40 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | The radio spectrum of the black hole X-ray binary GRO J1655-40 has undergone rapid changes over the past few days, according to observations by the Very Large Array (VLA). On Mar. 4th, data taken between 12:09 and 12:41 UT give flux densities of 1.2 +/- 0.2, 1.9 +/- 0.1, and 1.5 +/- 0.1 mJy at 1.425, 4.860, and 8.460 G... | 2005-03-08 03:33:00 | radio,x-ray,binary,black hole,transient |
438 | Announcement of INTEGRAL Galactic Bulge monitoring program and (re)brightening of GRO J1655-40 | E. Kuulkers (ESA/ESAC, Spain), S. Shaw (ISDC, Geneva), A. Paizis (ISDC Geneva/IASF Milano), N. Mowlavi, T. Courvoisier (ISDC, Geneva), K. Ebisawa (NASA/GSFC, USA), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (NASA/GSFC, USA),T. Oosterbroek, A. Orr (ESA/ESTEC, Netherlands) & R. Wijnands (UvA, Netherlands) | The Galactic Bulge is a region rich in bright and variable high-energy X-ray and gamma-ray sources. From February 17, 2005 and onwards we will observe this region regularly, using the European gamma-ray satellite INTEGRAL, during all the Galactic Bulge visibility periods under an approved AO-3 proposal (PI: Kuulkers). ... | 2005-03-08 23:19:00 | x-ray,gamma ray,binary,black hole,globular cluster,neutron star,soft gamma-ray repeater,star,transient,variables |
439 | Flux variability from the likely IR counterpart of SGR 1806-20 | G. L. Israel (INAF AO Roma), S. Covino (INAF AO Milano), S. Mereghetti (INAF IASF Milano), R. Mignani (ESO), L. Stella (AO Roma), V. Testa (AO Roma), G. Marconi (ESO), on behalf of a larger team | Following the refined radio position of SGR 1806-20 (Gaensler et al., astro-ph/0502393; Cameron et al., astro-ph/0502428), about 0.5" away from the preliminary one (Kouveliotou et al. 2005, GCN \#2929), we note that the possible counterpart we tentatively identified (Israel et al., ATel \#378) is not anymore included i... | 2005-03-11 05:08:00 | radio,infra-red,x-ray,gamma ray,soft gamma-ray repeater |
440 | GRO J1655-40 rapidly evolving | Jeroen Homan (MIT) | Daily RXTE/PCA observations of GRO J1655-40 show that the source is rapidly evolving. Between March 5.7 (ATel #436) and March 10.7 the 2-25 keV flux gradually increased by a factor of 5.2, to 8.2e-9 erg/s/cm^2, with the spectral power-law index increasing from ~1.5 to ~1.7 and the QPO frequency from 0.31 Hz to 2.3 Hz.
... | 2005-03-13 04:24:00 | radio,optical,x-ray,binary,black hole,transient,request for observations |
441 | GRO J1655-40 radio counterpart fades | M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan (NRAO) | The radio counterpart to the black hole X-ray binary GRO J1655-40 has faded considerably over the past few days. Observations by the Very Large Array (VLA) taken on March 14th, from 12:25 to 12:35 UT, gave no detection, with a nominal flux density at the location of the source of 0.15 +/- 0.14 mJy/beam at 8.46 GHz. The... | 2005-03-15 04:04:00 | radio,x-ray,binary,black hole,transient |
442 | INTEGRAL observes fading of GRO J1655-40 above 20 keV | S. Shaw (Southampton, UK & ISDC, Geneva), E. Kuulkers (ESA/ESAC, Spain), A. Paizis (ISDC, Geneva & IASF, Milano), N. Mowlavi (ISDC, Geneva), T. Courvoisier (ISDC, Geneva), K. Ebisawa (NASA/GSFC, USA), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (NASA/GSFC, USA),T. Oosterbroek (ESA/ESTEC, Netherlands), A. Orr (ESA/E... | We have observed a decrease in the the hard X-ray flux (above 20 keV) from the black hole binary GRO J1655-40, of about a factor of two (in four days), using INTEGRAL. This object has been observed for ~12 ksec approximately every 3 days since 17 Feb 2005 during the INTEGRAL Galactic Bulge Monitoring observations ( ATe... | 2005-03-17 01:12:00 | radio,x-ray,gamma ray,binary,black hole |
443 | Renewed radio emission from GRO J1655-40 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | The radio counterpart to the black hole X-ray binary GRO J1655-40 has again re-appeared, and is growing stronger (cf. ATEL #441). Observations taken at 4.86 GHz with the Very Large Array (VLA) showed a 1.77 +/- 0.07 mJy source on March 16th (13:38 to 14:29 UT), and a 3.6 +/- 0.1 mJy source on March 18th (12:59 to 13:10... | 2005-03-19 05:01:00 | radio,x-ray,binary,black hole,transient |
444 | New X-ray transient IGR J1709.8-3628 discovered with INTEGRAL | S. A. Grebenev (IKI, Moscow), S. V. Molkov (IKI, Moscow), R. A. Sunyaev (IKI, Moscow; MPA, Garching) | We report on the discovery with INTEGRAL of a probable new hard X-ray source located 9.4 arcmin off IGR J17091-3624. This source, IGR J1709.8-3628, was detected with IBIS/ISGRI on March 24.33-25.58, 2005 (UT) during deep Open Program observations of the Galactic center region. The S/N ratio at the mosaic image was 22.3... | 2005-03-27 01:04:00 | radio,optical,x-ray,gamma ray,transient,variables,request for observations |
445 | The RXTE/ASM reveals rebrightening of GROJ1655-40 | Smith, D. A. (U. of Michigan) | The RXTE/ASM reveals rebrightening of GROJ1655-40.
The 1-day averaged x-ray intensity of GRO J1655-40 has been declining since its maximum of 1.70±0.02 Crab (2-12 keV) on 2005 Mar 19 (UT), reaching a minimum of 940±10 mCrab on Mar 26. On Mar 27, the average intensity was 960±10 mCrab. The average of the five 90-s o... | 2005-03-29 02:04:00 | optical,x-ray,binary,black hole,transient |
446 | An outburst of the accreting millisecond X-ray pulsar XTE J1751-305 detected with INTEGRAL | S. A. Grebenev (IKI, Moscow), S. V. Molkov (IKI, Moscow), R. A. Sunyaev (IKI, Moscow; MPA, Garching) | The X-ray transient XTE J1751-305 was detected in outburst with IBIS/ISGRI on March 28.054-28.464, 2005 (UT), during INTEGRAL deep Open Program observations of the Galactic center region. The average flux was equal to 20.4+/-1.2 and 16.8+/-2.8 mCrab in the 18-45 and 45-80 keV bands. No notable variabilty was found on a... | 2005-03-29 02:51:00 | x-ray,neutron star,pulsar,star,transient,request for observations |
447 | Spectral evolution of IGR J17098-3628 observed by INTEGRAL and RXTE | S. A. Grebenev (IKI, Moscow), S. V. Molkov (IKI, Moscow), M. G. Revnivtsev (IKI, Moscow; MPA, Garching), R. A. Sunyaev (IKI, Moscow; MPA, Garching) | Two next sets of INTEGRAL deep Galactic center field observations (on March 26.104-26.778 and 28.054-28.464, 2005 UT) showed that IGR J17098-3628 (ATEL #444) is strongly evolving in both brightness and spectral shape. The flux measured during these sets was equal to 57.1+/-1.5 and 40.1+/-2.5 mCrab in the 18-45 keV band... | 2005-03-30 06:51:00 | radio,infra-red,optical,x-ray,black hole,nova,transient,request for observations |
448 | SN 2005ay - a type II SN to be observed by GALEX | Avishay Gal-Yam and Graham P. Smith (Caltech) | Avishay Gal-Yam and Graham P. Smith report on behalf of a larger collaboration, including the CCCP and the GALEX Core-collapse SN ToO teams: We observed SN 2005ay (Rich; IAUC# 8500 ) using the DBSP spectrograph mounted on the 200" Hale telescope at Palomar Observatory, starting on Mar 29.4 UT. A preliminary reduction o... | 2005-03-31 13:59:00 | optical,ultra-violet,supernovae,request for observations |
449 | RXTE PCA Observations of XTE J1751-305 | J. H. Swank (NASA/GSFC), C. B. Markwardt (U. Maryland & NASA/GSFC), E. A. Smith (L-3 Communications) | The RXTE PCA observed the position of XTE J1751-305 on Mar 28.812 (UTC) for about two minutes, on Mar 29.229-29.273, and on Mar 30.478-30.517, as well as in a scan on Mar 30.379. The PCA flux is systematically uncertain due to the contributions from diffuse galactic emission and other nearby sources in the PCA field of... | 2005-04-01 01:43:00 | x-ray,binary,pulsar,transient |
450 | Aql X-1 optical/IR outburst | Dipankar Maitra and Charles Bailyn (Yale) | Ongoing SMARTS consortium observations of Aql X-1 with the 1.3m telescope at CTIO + ANDICAM instrument show evidence for a new outburst from this source. Data obtained starting 3/29/05 showed significant flux above the quiescent level - as of April 2.381 (UT) we find R=17.1 (quiescent brightness of ~18.8) and J=15.5 (q... | 2005-04-03 09:40:00 | infra-red,optical,binary,neutron star,star,transient,request for observations |
451 | Type Determination for SN 2005az | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005az (IAUC # 8503 ), obtained April 4.49 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type Ib near peak brightness. Si II 635.5 nm is well developed and slightly stronger t... | 2005-04-05 02:10:00 | optical,supernovae |
452 | INTEGRAL detected Aql X-1 in hard X-rays | S. A. Grebenev (IKI, Moscow), G. Belanger (SEA, Saclay), A. Bodaghee (ISDC, Versoix), N. Lund (DSRI, Copenhagen), W. Hermsen (SRON, Utrecht; UvA, Amsterdam), A. Parmar (ESA/ESTEC, Noordwijk), J.-P. Roques (CESR, Toulouse), M. Mas-Hesse (LAEFF, Madrid) | INTEGRAL observed the region near Aql X-1 on April 1.825-1.924, 2005 (UT) during the Galactic plane scan. The IBIS/ISGRI telescope detected the source at the flux level of 54+/-3 and 64+/-8 mCrab in the 18-45 and 45-80 keV bands, respectively. The source was as well detected in the standard 3-20 keV X-ray band with JEM... | 2005-04-06 00:04:00 | radio,infra-red,optical,x-ray,neutron star,star,transient |
453 | INTEGRAL monitoring of IGR J17098-3628 | N. Mowlavi (ISDC, Geneva), E. Kuulkers (ESA/ESAC, Spain), J. Rodriguez, S. Shaw (ISDC, Geneva), A. Paizis (ISDC Geneva/IASF Milano), T. Courvoisier (ISDC, Geneva), K. Ebisawa (NASA/GSFC, USA), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (NASA/GSFC, USA), T. Oosterbroek, A. Orr (ESA/ESTEC, Netherlands), R. Wijnands (... | IGR J17098-3628 (ATEL #444) has been observed by INTEGRAL in the Galactic Bulge Monitoring program (ATEL #438). We detected the source with ISGRI in observations during 2005, March 26 00:00, April 2 02:45 and April 3 23:30 with fluxes of, respectively, ~50 mCrabs, ~12 mCrabs and ~9 mCrabs in 20-60 keV. The detection on... | 2005-04-06 00:35:00 | radio,optical,x-ray,gamma ray,transient |
454 | Type Determination for SN 2005be | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005be (IAUC # 8506 ), obtained April 6.49 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type Ia about a week after maximum. It is quite similar to the spectrum of SN 1996X at... | 2005-04-07 02:09:00 | optical,supernovae |
455 | State transition of GX 339-4 | D. M. Smith (University of California, Santa Cruz (UCSC)), Jeroen Homan (MIT), Nathan Bezayiff (UCSC) | Twice-weekly monitoring with the Proportional Counter Array (PCA) of the Rossi X-ray Timing Explorer shows that GX 339-4 is coming out of an extended period spent in the soft state. The most recent observation, made on 6 April 2005 from 18:03:00 to 18:20:00, shows spectral and timing characteristics of an intermediate ... | 2005-04-08 06:09:00 | radio,x-ray,binary,black hole,transient,request for observations |
456 | Discovery of a new X-ray transient IGR J16283-4838 with INTEGRAL | S. Soldi (ISDC, Geneva), S. Brandt (DSRI, Copenhagen), A. Domingo Garau (LAEFF, Vilspa), S. A. Grebenev (IKI, Moscow), E. Kuulkers (ESA/ESAC, Spain), G. G.C. Palumbo (Bologna University), A. Tarana (IASF/Rome-INAF) | We report the discovery of a new source by the IBIS/ISGRI detector on board INTEGRAL. The new source, IGR J16283-4838, was detected during a core program observation of the Norma Arm between 2005 April 7 13:56:50 U.T. and April 9 04:44:23 U.T., with a flux of ~3.6 mCrab in the 20-60 keV band and a significance of 6.2 i... | 2005-04-11 23:16:00 | x-ray,transient,request for observations |
457 | IGR J16493-4348 - a radiopulsar or a new X-ray binary | S. A. Grebenev (IKI, Moscow), A. J. Bird (Southampton University), S. V. Molkov (IKI, Moscow), S. Soldi (ISDC, Versoix), P. Kretschmar (ESA/ESAC, Vilspa), R. Diehl (MPE, Garhing), C. Budz-Joergensen (DSRI, Copenhagen), B. McBreen (UCD, Dublin) | During the Galactic plane survey carried out with INTEGRAL in 2004 a weak X-ray source was marginally (S/N=6.3) detected with IBIS/ISGRI at the position coincident with that of the 0.87 s radiopulsar PSR J1649-4349 (Bird et al., ApJ, 607, L33, 2004; Bassani et al. ATEL #232).
This source was recently detected again du... | 2005-04-12 22:52:00 | radio,infra-red,optical,x-ray,binary,black hole,neutron star,pulsar,star,transient |
458 | IGR J16283-4838 X-ray flux is rising | A. Paizis (ISDC Geneva, IASF Milano), J. M. Miller (Harvard-Smithsonian CfA), S. Soldi (ISDC Geneva), N. Mowlavi (ISDC Geneva) | Starting on April 10th, 2005, 01:25:59 UTC, INTEGRAL performed a TOO observation of GRO J1655-40 (PI Miller). The newly discovered IGR J16283-4838 (ATEL #456) has been in the partially coded field of view of ISGRI during all this observation. IGR J16283-4838 is detected in IBIS/ISGRI with a significance of 11.6 in the ... | 2005-04-13 22:10:00 | x-ray,transient |
459 | Swift-XRT detection of IGR J16283-4838 | J. A. Kennea, D. N. Burrows, J. A. Nousek, M. Chester, P. Roming (PSU), S. Barthelmy, N. Gehrels (GSFC), V. Beckmann (GSFC-UMBC), S. Soldi (ISDC) | We report the localization of the Integral-discovered X-ray transient IGR J16283-4838. IGR J16283-4838 was observed by Swift on April 13th at 14:01:56 UTC for 2.5ks as a Target of Opportunity observation. We have performed a preliminary analysis of the Swift-XRT data and have found a uncatalogued X-ray source at the fo... | 2005-04-14 01:59:00 | x-ray,gamma ray,transient |
460 | Possible infra-red counterpart to IGR J16283-4838 | Jerome Rodriguez (CEA Saclay & ISDC Versoix), Ada Paizis (ISDC Versoix & IASF Milano) | We report on 2-MASS archival data analyses of the field of IGR J16283-4838 (Atel #456, 458, 459). A clear source is detected in the 2-MASS All-Sky Quicklook image archive (with name 2MASS J16281083-4838560) in the K band at a position consistent with the X-ray position obtained with the SWIFT-XRT detector (Atel #459), ... | 2005-04-14 16:25:00 | infra-red,optical,x-ray,gamma ray,binary,black hole,neutron star,pulsar,star,transient |
461 | Discovery of CV ROTSE3 J16134+012124.4 | E. S. Rykoff (U. Mich.), R. Quimby (U. Texas.) on behalf of the ROTSE collaboration | Rapid analysis of ROTSE-III sky patrol fields reveals a new CV which we designate ROTSE3 J16134+012124.4. The object was first detected Apr. 13.37, 2005 by the ROTSE-IIIb telescope at McDonald Observatory, Texas, at an unfiltered magnitude of 17.5. Follow-up observations over the following 18 hours with ROTSE-IIIa (at ... | 2005-04-15 08:15:00 | optical,cataclysmic variable,transient,variables |
462 | New X-ray outburst from Rapid Burster | S. V.Molkov (IKI, Moscow), S. A.Grebenev (IKI, Moscow),R. A.Sunyaev (IKI, Moscow;MPA, Garching) | We report the detection of an outburst from MXB1730-335 (Rapid Burster) with the INTEGRAL observatory during ultra deep observations of the Galactic Center field. In observations during Apr. 14 UT08:20 - Apr. 14 UT18:00, 2005 the source flux increased from undetectability (<2 mCrab) to 17+/-2 mCrab in the 18-60 keV ene... | 2005-04-15 16:04:00 | x-ray,gamma ray,binary,globular cluster,transient |
463 | IGR J17303-0601 is a new intermediate polar | B. T. Gaensicke (Warwick), T. R. Marsh (Warwick), A. Edge (Durham), P. Rodriguez-Gil (IAC), D. Steeghs (CfA), S. Araujo-Betancor (STScI), E. Harlaftis (NO Athens), O. Giannakis (NO Athens), S. Pyrzas (Thessaloniki), L. Morales-Rueda (Nijmegen), A. Aungwerojwit (Warwick) | We have identified IGR J17303-0601 (1RXS J173021.5-055933) as an intermediate polar (IP). The optical counterpart is USNOA2.0 0825_10606993 (RA=17h30m21.9s Dec=-05d59m31s). Using optical photometry obtained in 2003 at the JKT and at the OGS we determine the white dwarf spin period to be 120s, which is the second-shorte... | 2005-04-15 16:24:00 | radio,optical,x-ray,binary,cataclysmic variable,nova,variables |
464 | Significant increase of the X-ray flux and slight softening of the spectrum of Aql X-1 | Jerome Rodriguez (CEA Saclay & ISDC Versoix), Ada Paizis (ISDC Versoix & IASF Milano), Marion Cadolle-Bel (CEA Saclay), Diana C. Hannikainen (Observatory of Helsinki) & Simon E. Shaw (Univ. Southampton & ISDC Versoix) | On April 12th, 2005, 20:49:01 UTC, INTEGRAL performed an observation of GRS 1915+105 as part of a monitoring campaign of this microquasar. During this observation, Aql X-1 has always been in the IBIS/ISGRI partially coded field of view. The IBIS/ISGRI telescope detected the source at a flux level of 141+-1 mCrab in the... | 2005-04-15 18:41:00 | x-ray,gamma ray,binary,black hole,neutron star,pulsar,star,transient |
465 | RXTE Observations of IGR J16283-4838 and IGR J16493-4348 | C. B. Markwardt (U. Maryland & NASA/GSFC), J. H. Swank, E. Smith (NASA/GSFC) | RXTE has observed two recently reported INTEGRAL transients, IGR J16493-4348 and IGR J16283-4838.
IGR J16493-4348 was reported to be associated with the pulsar PSR J1649-4349 (Grebenev et al, ATEL #457). RXTE observed on Apr 14 at 02:20 for 3.5 ks, and on Apr 15 at 14:33 for 2.6 ks. Because of the Proportional Counter... | 2005-04-17 05:36:00 | x-ray,black hole,neutron star,pulsar,star,transient,variables |
466 | Type Determination for SN 2005bp | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005bp (IAUC # 8515 ), obtained April 19.5 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type II shortly after explosion. Weak P-Cyg profiles of H_alpha and He I 587.6-nm are ... | 2005-04-20 05:34:00 | optical,supernovae |
467 | New X-ray transient IGR J17473-2721 discovered with INTEGRAL | S. A. Grebenev (IKI, Moscow), S. V. Molkov (IKI, Moscow), R. A. Sunyaev (IKI, Moscow; MPA, Garching) | We report the discovery with the IBIS/ISGRI telescope on board INTEGRAL of a previously unknown hard X-ray source IGR J17473-2721. The source was detected during ultra deep Open Program observations of the Galactic center field carried out on March 17-28 and April 9-21, 2005. The signal-to-noise ratio for this source a... | 2005-04-23 00:51:00 | radio,infra-red,optical,x-ray,black hole,neutron star,star,transient,request for observations |
468 | Start of OIR reflare in GX 339-4 | Michelle Buxton, Charles Bailyn (Yale University) | Observations of GX 339-4 taken with the SMARTS 1.3m telescope at CTIO show that it has increased significantly at infrared wavelengths, indicating the beginning of an optical/infrared (OIR) reflare. The change in magnitudes between MJD 53476.3 and MJD 53482.3 are as follows: dV = 0.4, dI = 0.5, dJ = 0.8, dH = 1.0. We h... | 2005-04-23 00:53:00 | radio,infra-red,optical,x-ray,binary,black hole,transient |
469 | IGR J11215-5952 discovered in INTEGRAL Galactic Plane Scans | P. Lubinski (CAMK, Warsaw & ISDC), M. Gadolle Bel (CEA, Saclay), A. von Kienlin (MPE, Munich ), C. Budtz-Jorgensen (DSRI, Copenhagen), B. McBreen (Univ. College Dublin), P. Kretschmar (ESA/ESAC, Spain), W. Hermsen (SRON-Utrecht), P. Shtykovsky(SRI, Moscow) | We report the discovery of a new source of hard X-rays by the IBIS/ISGRI detector on board INTEGRAL. The new source, IGR J11215-5952, was detected in the 20--60 keV band in two consecutive core programme observations of Galactic Plane Survey, each of ~ 2100 second duration. The approximate 20--60 keV count-rate and mCr... | 2005-04-23 01:27:00 | x-ray,gamma ray,transient,request for observations |
470 | HD 306414 and IGR J11215-5952 | Ignacio Negueruela (Alicante), David M. Smith (U. C. Santa Cruz), Sylvain Chaty (CEA/Saclay) | We note that the B supergiant HD 306414 (Tycho coordinates RA: 11 21 46.807, Dec: -59 51 47.93) lies only 16" away from the nominal position for the new INTEGRAL transient IGR J11215-5952 (ATel #469).
From 2MASS and USNO-B1 archival data analyses, HD 306414 is the brightest optical object in the 3' error circle, thoug... | 2005-04-23 17:38:00 | infra-red,optical,x-ray,binary,transient,a comment |
471 | Type Determination for SN 2005bt | The Nearby Supernova Factory: P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Cent... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005bt (IAUC # 8518 ), obtained April 24.5 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type II with well developed hydrogen features as well as He I 587.6 nm. Assuming the N... | 2005-04-26 14:13:00 | optical,supernovae |
472 | Hard X-ray brightening of Ginga 1843+009 seen by INTEGRAL | J.-C. Leyder (ISDC, Geneva & IAG Liege), J. Chenevez (DSRI, Copenhagen), M. T. Fiocchi (IASF/Rome-INAF), M. Revnivtsev (IKI, Moscow & MPA, Garching), J. Paul (CEN--Saclay), T. Oosterbroek (ESA/ESTEC), M. Mas-Hesse (LAEFF, Madrid), A. Strong (MPI, Garching) | The transient X-ray pulsar, Ginga 1843+009, appears to be undergoing a hard X-ray outburst brighter than the one reported in May 2003 (ATEL #159).
The source has been observed during ISWT observations of the Scutum Arm region with INTEGRAL and was first detected when the source was in the field of view of the ISGRI im... | 2005-04-29 23:04:00 | x-ray,gamma ray,pulsar,transient |
473 | Type Determination for SN in UGC 8539 | The Nearby Supernova Factory: N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of the SN in UGC 8539 (Tim Puckett, private communication), obtained April 29.5 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be an early Type II at the redshift of the host galaxy. Pres... | 2005-04-30 00:59:00 | optical,supernovae |
474 | Type Determination for SN 2005bx | The Nearby Supernova Factory: C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. ... | The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005bx (CBET #148), obtained May 1.5 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type IIn. Assuming the NED velocity for the host of 9359 km/s, H-alpha appears in emission w... | 2005-05-02 00:06:00 | optical,supernovae |
475 | Type confirmation of SN 2005bx | A. Gal-Yam, D. J. Sand, S. B. Cenko, D. C. Leonard and J. Muller (Caltech/Palomar Observatory) | A. Gal-Yam, D. J. Sand, S. B. Cenko, D. C. Leonard, and J. Muller report on behalf of the CCCP that a preliminarily reduced spectrum (range 4000 - 9500 A) of SN 2005bx (Rich et al., CBET # 148) obtained using the double spectrograph mounted on the Palomar Observatory 200" Hale telescope, on Apr. 30, 2005, UT, shows thi... | 2005-05-03 02:49:00 | optical,supernovae |
476 | Swift-XRT detection of IGR J17098-3626 | J. A. Kennea, D. N. Burrows, J. A. Nousek, M. Chester (PSU), S. Barthelmy, N. Gehrels (GSFC), S. Grebenev (IKI-Moscow), V. Beckmann (GSFC-UMBC) | We report the localization of the Integral-discovered X-ray transient IGR J17098-3626 (ATEL #444). IGR J17098-3626 was observed by Swift on May 1st from 16:23 UTC until 18:19 UTC with an exposure time of 2.8ks. The source was predicted to be bright, so the XRT was put into Photon Counting mode for 500s of the observati... | 2005-05-03 03:03:00 | x-ray,gamma ray,transient |
477 | Possible infrared/optical counterpart of IGR J17098-3628 | A. K.H. Kong (MIT) | Following the soft X-ray detection of the X-ray transient IGR J17098-3628 with Swift-XRT, we search for infrared/optical counterpart with the 2MASS All-Sky Catalog and the SuperCOSMOS Sky Survey. We note that there is a single star within the 5" radius error circle of the Swift-XRT (ATEL #476). The infrared counterpart... | 2005-05-03 08:46:00 | infra-red,optical,x-ray,binary,star,transient |
478 | Optical/NIR imaging of IGR J17098-3628 and IGR J16283-4838 | D. Steeghs (CfA), M. A.P. Torres (CfA), P. G.Jonker (SRON/CfA), J. Miller (CfA), P. Green (CfA), C. Rakowski (CfA) | We report on optical and infrared observations acquired with the 6.5m Magellan-Baade telescope of the fields containing the INTEGRAL transients IGR J17098-3628 (ATEL#444) and IGR J16283-4838 (ATEL#456) for which SWIFT localizations have been reported (ATEL#476,#459).
IGR J17098-3628: optical I-band images of the field... | 2005-05-04 04:53:00 | infra-red,optical,x-ray,binary,black hole,neutron star,star,transient,variables |
479 | Possible Swift-UVOT optical counterpart for IGR J17098-3628 | A. J. Blustin (MSSL-UCL), A. K. H. Kong (MIT), K. Wu, C. Brocksopp, K. McGowan (MSSL-UCL), J. A. Kennea, P. Roming, J. A. Nousek (PSU), K. O. Mason (MSSL-UCL), N. Gehrels (GSFC) on behalf of the Swift-UVOT team | The X-ray transient IGR J17098-3628, discovered by INTEGRAL (ATEL #444), was observed by Swift on May 1st from 16:23 UTC until 18:19 UTC. It was detected in soft X-rays by the Swift-XRT (ATEL #476), and possible optical/IR counterparts, associated with 2MASS J17094612-3627573, have been identified from the 2MASS All-Sk... | 2005-05-04 05:45:00 | infra-red,optical,x-ray,binary,black hole,neutron star,star,transient |
480 | Type determination of SN 2005by | Avishay Gal-Yam and George Djorgovski (Caltech) | Avishay Gal-Yam and George Djorgovski report that a spectrum obtained by Djorgovski with the DBSP spectrograph mounted on the Hale 200" telescope at Palomar Observatory, on May 4 2005 UT, shows this event is a young type II SN. Prominent broad Halpha with a P-cygni profile is superposed on a blue continuum. | 2005-05-05 02:29:00 | optical,supernovae |
481 | SDSS J124819.36+072049.4 is a Dwarf Nova | R. Quimby, M. Sellers, P. Mondol, P. Hoeflich, J. C. Wheeler (University of Texas), and C. Gerardy (Imperial College) | We report the discovery of a dwarf nova in unfiltered CCD images taken on Apr 26.25 UT (about 16.7 mag) and Apr 28.20 (about 17.0 mag) using the 0.45m ROTSE-IIIb telescope at the McDonald Observatory. The object is located at RA = 12h48m19.38s DEC = +07o20'48.8" and was not detected in ROTSE-IIIb data from Apr 20.20 UT... | 2005-05-06 01:14:00 | optical,cataclysmic variable,nova,transient,variables |
482 | Superburst in 4U1608-52 | R. Remillard and E. Morgan (MIT Kavli Institute for Astrophysics and Space Research) for the ASM team at MIT and NASA/GSFC | The light curve of "x1608-522" from the RXTE All-Sky Monitor on 2005 May 5 reveals a likely superburst lasting many hours. The ASM flux (2-12 keV) had been roughly steady during the last few days, ending with the measurement of 0.34 (03) Crab on MJD 53495.03995. The next measurement shows an abrupt increase to 1.25 (0.... | 2005-05-06 01:42:00 | x-ray,neutron star,star |
483 | Probable superbursts in 4U 0614+091 and 4U 1608-522 | Erik Kuulkers (ISOC, ESA/ESAC, Spain) | Inspection of the RXTE/ASM database of 4U 0614+091 reveals a recent flare which occurred on March 12, 2005. The 1.5-12 keV flux increased by a factor of 5-6 up to 0.3 Crab within ~7.5 hours. About 1.5 hours later the flux had dropped to 0.17 Crab; ~9.5 hours later it had reached the pre-flare flux level again. The expo... | 2005-05-06 23:27:00 | x-ray,binary,neutron star,star,a comment |
484 | X-ray Outburst of the blazar, 3C454.3 | R. Remillard (MIT Kavli Institute for Astrophysics and Space Research) for the RXTE ASM team at MIT and NASA/GSFC | The X-ray light curve of the blazar 3C454.3 was processed from observations with the RXTE All-Sky Monitor, following the report by Balonek (VSNET Alert) of an optical outburst. An X-ray detection is evident when the results are examined on timescales of one week or longer. Over the recent time interval, MJD 53490.0 to ... | 2005-05-11 23:21:00 | optical,x-ray,agn,blazar,pulsar,quasar,transient |
485 | OIR decline in GRO J1655-40 | Michelle Buxton, Charles Bailyn (Yale University) | We have been monitoring the black-hole X-ray transient GRO J1655-40 in optical and infrared bands since the beginning of the current outburst (ATEL #414, 418). Observations are made daily (when possible) with the SMARTS 1.3m telescope at CTIO using the ANDICAM instrument. For the past 40 days, GRO J1655-40 remained at ... | 2005-05-11 23:29:00 | infra-red,optical,x-ray,binary,black hole,transient |
486 | Multiwavelength evolution of GROJ1655-40 | D. A. Smith (U. of Michigan) | ROTSE-III monitoring of GRO J1655-40 reveals that over the last 24 hours, the optical intensity of this source has declined significantly. For the last forty days, it has remained near an unfiltered magnitude of 14.2 (calibrated to the USNO A2.0 R-band catalog), but at MJD 53500.489 it dropped to 14.7±0.2, and since 5... | 2005-05-11 23:47:00 | optical,x-ray,black hole,transient |
487 | GRO J1655-40 enters a highly-variable, high-luminosity state | Jeroen Homan (MIT), Jon M. Miller (CfA), Rudy Wijnands (U. of Amsterdam), and Walter H. G. Lewin (MIT) | GRO J1655-40 enters a highly-variable, high-luminosity state Jeroen Homan (MIT), Jon M. Miller (CfA), Rudy Wijnands (U. of Amsterdam), and Walter H.G. Lewin (MIT) Recent RXTE observations of the black hole X-ray transient GRO J1655-40, which is currently in outburst (e.g. ATEL #414,#417,#418,#419,#432,#438), show that ... | 2005-05-11 23:53:00 | radio,optical,x-ray,binary,black hole,transient,variables,request for observations |
488 | Radio monitoring of the blasar 3C454.3 | Trushkin S. A. ( SAO RAS), Harinov M. A., Michailov A. G. (IAA RAS) | In ATEL #484 R. Remillard annonced about the bright X-ray outburst of the blazar 3C454.3 in May 2005. We have monitored 3C454.3 during the last 6 mounths with the RATAN-600 (SAO RAS) radio telescope in 17 September 2004 and then with RT32 radio telescope (Institute of Applied Astronomy RAS) from December 2004 to April ... | 2005-05-12 17:28:00 | radio,millimeter,x-ray,agn,blazar,request for observations |
489 | Recent radio evolution of GRO J1655-40 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | Very Large Array (VLA) observations of of the black-hole X-ray binary GRO J1655-40 show a slight increase in radio flux density corresponding to the recent change in X-ray and optical/IR state (ATEL #485, ATEL #486, ATEL #487). The following results were obtained at 4.86 GHz:
The full radio light curves are shown at h... | 2005-05-12 22:26:00 | radio,optical,x-ray,binary,black hole,transient |
490 | Probable radio counterpart to IGR J17098-3628 | M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan (NRAO) | Very Large Array (VLA) observations of IGR J17098-3628 (ATEL #444) were made on March 31st, April 5th, April 12th, and May 4th UT, all at 4.86 GHz. The first data set showed the only significant radio source within the 2 arcminute INTEGRAL error circle, located at (J2000)
The NRAO VLA Sky Survey (NVSS; Condon et al. 1... | 2005-05-12 23:53:00 | radio,x-ray,binary,black hole,neutron star,star,transient |
491 | Radio observations of Aql X-1 | M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan (NRAO) | Observations with the Very Large Array (VLA) during the recent X-ray outburst of Aql X-1 (ATEL #450, ATEL #452, ATEL #464) give the following nominal flux densities at 4.86 GHz:
Further VLA observations are planned.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated und... | 2005-05-13 00:07:00 | radio,x-ray,binary,neutron star,star,transient |
492 | Detection of the Progenitor of SN 2004et | W. Li and A. V. Filippenko (University of California, Berkeley); and S. D. Van Dyk (Spitzer Science Center, California Institute of Technology) | The site of the Type II SN 2004et in NGC 6946 has been imaged in the Hubble Space Telescope Snapshot program GO-10272 (PI: A. V. Filippenko) with the ACS/HRC on 2005 May 2 UT. A pair of CR-split images was taken with each of the F435W and F625W filters, for a total exposure time of 840 s and 360 s, respectively. SN 200... | 2005-05-13 11:44:00 | optical,supernovae |
493 | Type Determination for SN 2005bz | The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut ... | The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of SN 2005bz (IAUC # 8527 ), obtained May 14.6 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type IIP SN at least a month after explosion. A well-developed net-emission H-alpha prof... | 2005-05-15 06:23:00 | optical,supernovae |
494 | Optical counterpart to IGR J17098-3628 | D. Steeghs (CfA), M. A.P. Torres (CfA), P. G.Jonker (SRON/CfA), H. Chen (MIT), P. Green (CfA), J. Miller (CfA), M. R.Garcia (CfA) | Following the recent report of a possible radio counterpart to the X-ray transient IGR J17098-3628 (ATEL #490), we re-investigated our Magellan I-band exposures obtained on 2005 April 9 UT (see ATEL #478). The frames show a point source located at R.A.(J2000)=17:09:45.93, DEC(J2000)= -36:27:58.2 in the 2MASS reference ... | 2005-05-16 08:27:00 | radio,infra-red,optical,x-ray,black hole,neutron star,star,transient |
495 | 4U 1715-390 and NGC 6440 in Outburst | C. B. Markwardt (NASA/GSFC and U. Maryland), J. H. Swank (NASA/GSFC) | RXTE Proportional Counter Array scans of the galactic bulge region have been continuing.
The burster in the globular cluster NGC 6440 (MXB 1746-20) appears to be entering outburst. The previous outburst was in October 2001. The 2-10 keV fluxes on May 12.6, 15.6 and 16.1 were 5.4 +/- 1.0, 7 +/- 3 and 21 +/- 1 mCrab, re... | 2005-05-18 22:53:00 | x-ray,globular cluster,neutron star,star,transient |
496 | Swift-UVOT Ultra-Violet/Optical Observations of GRO J1655-40 | Albert K. H. Kong, Jeroen Homan, and Walter H. G. Lewin (MIT) | We report Swift-UVOT observations of GRO J1655-40 during the recent outburst. GRO J1655-40 has been observed with Swift for 9 times since April and the Ultra-Violet/Optical telescope (UVOT) obtained images through the U, B, V, UVW1, and UVW2 filters during 3 of the observations. GRO J1655-40 was clearly detected and we... | 2005-05-20 02:00:00 | optical,ultra-violet,x-ray,binary,black hole,transient |
497 | INTEGRAL observation of the blazar 3C454.3 in outburst | L. Foschini, G. Di Cocco, G. Malaguti (INAF/IASF, Sezione di Bologna), E. Pian (INAF, Astronomical Observatory of Trieste), G. Tagliaferri, G. Ghisellini, L. Maraschi (INAF, Astronomical Observatory of Brera), P. Giommi (ASI-ASDC), N. Gehrels (NASA-GSFC), R. Walter, D. Eckert (ISDC) on behalf of a large collaborat... | The blazar 3C 454.3 (z = 0.859) has been observed by INTEGRAL as a Target-of-Opportunity for 200 ks, starting on May 15, 2005, at 18:40 UT following the announcement of a bright state at various frequencies (see Balonek, VSNET Alert; Remillard, ATel 484; Trushkin et al., ATel 488).
The source was clearly detected by t... | 2005-05-20 22:27:00 | x-ray,gamma ray,agn,blazar,quasar,transient,request for observations |
498 | Discovery of XTE J1747-274 | C. B. Markwardt (U. Maryland & NASA/GSFC), J. H. Swank (NASA/GSFC) | A new source has appeared in scans of the galactic center by the RXTE Proportional Counter Array (PCA). The flux increase first became noticeable in PCA scans on May 11, 15 and 18. Unfortunately, because this region of the sky is relatively crowded, the flux increase was attributed to the nearby source GCRT J1746-2757.... | 2005-05-24 00:25:00 | x-ray,binary,black hole,neutron star,star,transient,request for observations |
499 | Discovery of SNF20050519-000, a Type Ia Supernova | The Nearby Supernova Factory: P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. Aldering, S. Bailey, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonn... | The Nearby Supernova Factory reports the discovery of SNF20050519-000 (coordinates RA 21:35:52.5 DEC -26:27:03.5 J2000.0) in an image obtained May 19.5 UT with the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking component of the Palomar Consortium. A spectrum (r... | 2005-05-25 00:36:00 | asteroid,supernovae |
500 | Swift XRT Observation of the XTE J1747-274 field | J. A. Kennea, D. N. Burrows (PSU), C. Markwardt (UMD/GSFC), N. Gehrels (GSFC) | Starting on May 23rd 2005, 22:09UT the Swift observatary observed a field centered on the RXTE source RXTE J1747-274 (Markwardt et al., ATEL #498). After ground processing we obtained 1261s of Photon Counting mode data from the Swift XRT. From these data we find a bright point source located at: RA(J2000): 17:47:17.8 D... | 2005-05-25 06:25:00 | x-ray,transient |
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