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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301 | Another X-Ray Brightening of H 1743-322 = IGR J1746-3213 | Jean Swank(NASA/GSFC) | The black hole candidate X-ray transient H 1743-322 = IGR J1746-3213 = XTE J17464-3213, which went into outburst in March 2003 (ATEL#132,#133) and decayed below the RXTE PCA sensitivity limit sometime between Nov 2 and 2004 Feb 7, while it was too close to the sun, has brightened again. On Jul 3, the PCA scans of the g... | 2004-07-11 03:17:00 | radio,x-ray,binary,black hole,the sun,transient,request for observations |
302 | Radio observations of V4641 Sgr at 6 and 3 cm | Cliff Senkbeil (Univ of Tasmania), Bob Sault (Australia Telescope National Facility) | Australia Telescope Compact Array observations of V4641 Sgr on 7 July show a clear detection at 6 and 3 cm (4.80 and 8.64 GHz). For observations taken between 14.5 to 19.0 hours UT, the flux density was seen to vary between approximately 5mJy and 30mJy. In particular, a sudden increase was noted at 16.4 UT, followed by... | 2004-07-11 09:04:00 | radio,binary,black hole,transient,request for observations |
303 | V4641 Sgr: continued radio flaring | M. P. Rupen, V. Dhawan, A. J. Mioduszewski (NRAO) | We report further Very Large Array (VLA) observations of the black hole candidate binary V4641 Sgr, currently active at optical, X-ray, and radio wavelengths (see ATEL #295, ATEL #296, ATEL #297, ATEL #299, ATEL #300, ATEL #302):
These data in conjunction with earlier observations from the VLA (ATEL #296), RATAN (ATEL... | 2004-07-12 06:51:00 | radio,optical,x-ray,binary,black hole,transient,variables |
304 | Radio observations of H1743-322 = IGR J1746-3213 = XTE J17464-3213 | M. P. Rupen, V. Dhawan, A. J. Mioduszewski (NRAO) | We report Very Large Array (VLA) observations of the black hole candidate binary H1743-322 = IGR J1746-3213 = XTE J17464-3213, currently undergoing an X-ray outburst (ATEL #301). Data taken on 11 July 2004 show no detections at 4.86 and 8.46 GHz, with nominal flux densities at the position of the source of 0.17 +/- 0.2... | 2004-07-12 06:55:00 | radio,x-ray,binary,black hole,star,transient,variables |
305 | New Outburst of the Ultraluminous Supersoft X-ray Source in M101 | A. K.H. Kong (Harvard-Smithsonian Center for Astrophysics) | A new outburst of the ultraluminous supersoft X-ray source in M101 (CXOU J140332.3+542103) was detected during a recent 9.9 ks Chandra observation on 2004 July 5. More than 200 counts was detected and the energy spectrum can be fit with an absorbed blackbody model with kT=70+/-15 eV and N_H=(2.2+/-1.7)e21 cm^-2 (90% un... | 2004-07-13 13:19:00 | x-ray,binary,black hole,transient |
306 | Outburst of the Ultraluminous Supersoft X-ray Source in M101 | A. K.H. Kong (Harvard-Smithsonian Center for Astrophysics) | We report further Chandra observations of the ultraluminous supersoft X-ray source in M101, currently in outburst (ATEL #305). Data taken on 2004 July 6 (for 28 ks) and 2004 July 8 (for 54 ks) show that the source is in high/supersoft state. Preliminary analysis shows that the energy spectrum of the first observation c... | 2004-07-14 16:11:00 | x-ray,binary,black hole,transient |
307 | Her X-1 Exiting Anomalous Low State | Patricia Boyd (NASA/GSFC and UMBC) Martin Still (NASA/GSFC and USRA) and Robin Corbet (NASA/GSFC and USRA) | Recent RXTE All-Sky Monitor (ASM) measurements of the X-ray flux of Her X-1 (= HZ Her) suggest that the source has exited the anomalous low state (ALS) and is again exhibiting long-term variability with a period near 35 days. Current (MJD 53196.8) RXTE ASM average count rates are above 5 counts/s, whereas during ALS th... | 2004-07-15 05:13:00 | optical,x-ray,binary,neutron star,pulsar,star,request for observations |
308 | Optical observations of the field around the X-ray pulsars XTE J1858+034 and GRO J2058+42 | Pablo Reig (University of Crete), Tasos Kougentakis (University of Crete), Giannis Papamastorakis (University of Crete) | We report photometric and spectroscopic optical observations of the likely optical counterparts to the 221-s XTE J1858+034 (Remillard & Levine and Takeshima & Corbet, 1998, IAUCirc 6826) and the 196-s high-mass X-ray binary (HMXB) pulsars GRO J2058+42 (Wilson et al. 1996, IAUCirc 6514, Wilson et al. 1998, ApJ, 499, 820... | 2004-07-15 21:26:00 | optical,x-ray,binary,pulsar,star,transient |
309 | V4641 Sgr: new optical flaring | I. Bikmaev (KSU), I. Khamitov, Z. Aslan (TUG), N. Sakhibullin (KSU), R. Burenin, M Pavlinsky (IKI), M. Revnivtsev, R. Sunyaev (IKI, MPA) | We have performed photometric time-series observations (Rc-band) of X-ray binary system V4641Sgr with the Russian-Turkish telescope RTT150 at the TUBITAK National Observatory (Turkey) during the period of 18:33-23:32 UT, July 17,2004. Several optical flaring with increasing of brightness amplitude up to 0.6 mag have be... | 2004-07-18 21:14:00 | optical,x-ray,binary,black hole,request for observations |
310 | IGR J18027-1455 / USNO-B1.0 0750-0506536 is an AGN | N. Masetti, E. Palazzi, L. Bassani, A. Malizia, J. B. Stephen (IASF/CNR-INAF Bologna Italy) | It has recently been suggested that the radio/near-infrared/optical and soft X-ray sources NVSS J180247-145451, 2MASXi J1802473-145454, USNO-B1.0 0750-0506536 and 1RXS J180245.5-145432 are in fact the same object and this is also considered as the most likely counterpart of the new INTEGRAL/IBIS source IGR J18027-1455 ... | 2004-07-20 20:30:00 | radio,infra-red,optical,x-ray,gamma ray,agn,black hole |
311 | Radio observations of the ultraluminous supersoft X-ray source in M101 | M. P. Rupen (NRAO), L. O. Sjouwerman (NRAO), A. K.H. Kong (Harvard-Smithsonian Center for Astrophysics) | We report Very Large Array (VLA) observations of the ultraluminous supersoft X-ray source in M101, currently undergoing a strong X-ray outburst (ATEL #305, ATEL #306). Data taken on 21 July 2004 show no detections at 4.86 and 8.46 GHz, with nominal flux densities at the Chandra position (ATEL #305) of 0.093 +/- 0.033 m... | 2004-07-22 01:05:00 | radio,x-ray,binary,black hole,transient,variables |
312 | Radio observations of BD +60 73 = IGR J00370+6122 | P. B. Cameron (1, 2), J. Grcevich (1, 3), N. Gugliucci (1, 4), K. Hess (1, 5), C. Ly (1, 6), K. Schillemat (1, 7), A. Shetiya (1, 8), C. Simpson (1, 9), A. Stilp (1, 3), Urvashi Rao Venkata (1, 10), B. Zeiger (1, 11) (1 NRAO; 2 Caltech; 3 U. of Wisconsin-Madison; 4 Lycoming College; 5 Cornell U; 6 U of Arizona; 7 Clark... | We report Very Large Array (VLA) D-configuration observations of recently discovered High Mass X-ray Binary IGR J00370+6122 = BD +60 73 (ATEL #281, #282, #285). Data taken by the VLA Summer Students on 9 July 2004, from 16:58 to 18:58 UT, show no detections at the frequencies listed below with the nominal flux densitie... | 2004-07-24 07:06:00 | radio,x-ray,gamma ray,binary,neutron star,star,variables |
313 | Gradual Brightening of SGR 1806-20 | Peter M. Woods (USRA/NSSTC), Chryssa Kouveliotou (MSFC/NSSTC), Ersin Gogus (Sabanci Univ), Sandy Patel (USRA/NSSTC), Kevin Hurley (UCB), and Jean Swank (NASA/GSFC) | The Soft Gamma Repeater SGR 1806-20 became particularly burst active in May 2004 (GCN 2603, 2604) and has remained active up through the present. Over this interval, both the pulsed X-ray flux as measured with the RXTE/PCA and the phase-averaged X-ray flux as measured with Chandra/ACIS have been 2 to 3 times higher tha... | 2004-07-29 01:45:00 | infra-red,x-ray,gamma ray,soft gamma-ray repeater,request for observations |
314 | Renewed radio activity in H1743-322 = IGR J1746-3213 = XTE J17464-3213 | M. P. Rupen, A. J. Mioduszewski, V. Dhawan (NRAO) | Very Large Array (VLA) observations of the black hole candidate binary H1743-322 = IGR J1746-3213 = XTE J17464-3213 (e.g., ATEL #301, ATEL #304) show renewed radio activity on 5 August 2004. Two sets of scans, from 01:18 to 01:34 and 03:34 to 03:46 UT, were consistent with a steady flux density of 1.96 +/- 0.15 mJy at ... | 2004-08-07 01:14:00 | radio,infra-red,optical,x-ray,binary,black hole,transient |
315 | V4641 Sgr returns to quiescence; deep observations planned | M. P. Rupen (NRAO), P. G. Jonker (CfA), A. J. Mioduszewski, V. Dhawan (NRAO), R. P. Fender (U. Amsterdam), & G. Dubus (LLR) | Observations of the X-ray binary V4641 Sgr (e.g., ATEL #309, ATEL #303) with the Very Large Array (VLA) show that the object has returned to quiescence. Our last clear detection was on 20 July 2004, when the 4.86 GHz flux density remained steady at 2.0 +/- 0.2 mJy in two five-minute observations centered on 05:06 and 0... | 2004-08-07 01:58:00 | radio,infra-red,optical,x-ray,binary,black hole,transient,variables,request for observations |
316 | GX 339-4 : Significant decline in IR and Optical | M. M. Buxton, C. D. Bailyn (Yale) | We have been making daily optical and infrared observations of the black-hole candidate and microquasar GX 339-4 using ANDICAM on the SMARTS 1.3m telescope at CTIO. Data obtained on UT Aug 05, 06 and 08 show that GX 339-4 has become significantly fainter since UT Jul 31, and that the magnitude of this change increases ... | 2004-08-10 03:14:00 | optical,binary,black hole,transient |
317 | XTE J1829-098: a New 7.8 s Period Pulsar | C. B. Markwardt (U. Maryland & NASA/GSFC); J. H. Swank (NASA/GSFC); E. A. Smith (NASA/GSFC) | Within the past three months, RXTE PCA monitoring observations of the galactic center region have been enlarged to include portions of the galactic plane on either side of the galactic bulge. The scans extend to about +/- 25 degrees in galactic longitude and +/- 4 degrees in galactic latitude.
Scans on July 30.9 (UTC)... | 2004-08-10 10:02:00 | x-ray,binary,neutron star,pulsar,star,supernova remnant,supernovae,transient |
318 | GX 339-4 leaving the hard X-ray state - radio flare expected | Jeroen Homan (MIT) | Recent Rossi X-ray Timing Explorer observations of the black hole transient GX 339-4 show that the source is leaving the bright hard state. The evolution of the spectral and variability properties is very similar to the behavior seen during the outburst of GX 339-4 in 2002: the spectral power-law component has started ... | 2004-08-11 05:57:00 | radio,infra-red,optical,x-ray,binary,black hole,transient,request for observations |
319 | XMM-Newton Detection of the 7.8 s Pulsar XTE J1829-098 | J. P. Halpern, E. V. Gotthelf (Columbia U.) | An outburst of the newly discovered 7.8 s pulsar XTE J1829-098 (Markwardt et al., ATEL #317) is seen in an unpublished XMM-Newton Galactic Plane Survey observation taken on 2003 March 27, when the source had a barycentric pulse period of 7.840+/-0.002 s and a count rate of 4.5 counts/s in the EPIC pn camera. Its positi... | 2004-08-11 10:36:00 | x-ray,pulsar |
320 | Phototyping of SN2004cs with the Palomar 60-inch telescope | A. Rajala, D. B. Fox, and A. Gal-Yam (Caltech) | We have observed SN2004cs (IAUC 8361 ) in the Johnson BVR and Gunn g bands with the robotic Palomar 60-inch (1.5-m) telescope + CCD imager. Data were obtained on June 24 UT, one night after the discovery report for SN2004cs, and calibrated with images obtained on July 30 UT. The derived magnitudes and uncertainties for... | 2004-08-12 21:52:00 | optical,supernovae |
321 | Spectroscopic identification of SNe 2004ds and SN 2004dt | Avishay Gal-Yam (Caltech) | A. Gal-Yam, D. Fox and S. Kulkarni, California Institute of Technology, report on red spectra (range 550-780 nm) obtained by Kulkarni and Fox on Aug. 13.5 UT at the 10-m Keck I telescope (+ LRIS). The spectrum of of SN 2004ds (IAUC # 8386 ), shows a broad, well-developed P-Cyg H_alpha line and suggests that this is a t... | 2004-08-14 07:47:00 | optical,supernovae |
322 | Confirmation of the Transition to the Very High State in GX 339-4 | D. M. Smith, S. K. Bushart (University of California, Santa Cruz) | Homan (2004, ATEL #318) recently predicted that black-hole candidate GX 339-4 would make a transition to the Very High State around August 14, and we find, also using data from the Rossi X-ray Timing Explorer, that this transition has occurred.
The photon spectral index had averaged around 1.50 for the past month in t... | 2004-08-20 09:09:00 | x-ray,gamma ray,binary,black hole,transient,variables,request for observations |
323 | GX 339-4: Continued Optical and Infra-red Decline | Charles Bailyn, Lisa Ferrara (Yale) | Ongoing observations of GX 339-4 by the SMARTS consortium 1.3m telescope and ANDICAM instrument at CTIO show a continuing sharp decline in optical and near-IR flux levels throughout the X-ray state transition described by Smith et al. (ATEL #322). Data taken starting August 20 UT=2:36 shows V=16.8, I=15.1, J=14.9, H=14... | 2004-08-21 02:49:00 | infra-red,optical,x-ray,binary,black hole,transient |
324 | Burst Activity of SGR 1806-20 in the hard X-rays | S. Molkov (IKI, Moscow), P. Ubertini (IASF, Roma), C. Jorgensen (DSRI, Copenhagen), C. Winkler (ESA/ESTEC Noordwijk), N. Gehrels (GSFC, NASA) | During one of the regular Galactic Plan Scan performed by the High energy INTEGRAL satellite on 20-21 August, 2004 the Soft Gamma Ray Repeater SGR 1806-20 was in the field of view of the IBIS telescope during ~10 ks. Seven bursts were detected by the ISGRI/IBIS low energy detection plane from the source during this per... | 2004-08-26 00:12:00 | x-ray,gamma ray,binary,soft gamma-ray repeater,request for observations |
325 | SGR 1806-20 | S. Molkov (IKI, Moscow), K. Hurley (USB), A. Lutovinov (IKI, Moscow), R. Sunyaev (IKI, Moscow and MPA, Garching) | The Soft Gamma-Ray Repeater SGR 1806-20 was observed with INTEGRAL during the campaign of the Galactic Center monitoring on 21-24 Aug, 2004. These observations were preceded by the INTEGRAL Galactic Plan Scan in which the source exhibited bursting activity (ATEL#324).
The source was in the field of view of the IBIS te... | 2004-08-31 02:28:00 | x-ray,gamma ray,soft gamma-ray repeater |
326 | New outburst from 4U0115+634 | A. Lutovinov (IKI, Moscow), C. Budtz-Jorgensen (DSRI, Copenhagen), M. Turler (ISDC, Versoix), P. Kretschmar (ISDC, Versoix, MPE, Garching), W. Hermsen (SRON, Utrecht), E. Kuulkers (ESTEC, Noordwijk) | During the last galactic plane scans performed with the INTEGRAL observatory on 29 Aug, 2004 an increase of the flux from 4U0115+634 was detected, that can be connected with the beginning of possible new outburst. The source was detected with IBIS and JEM-X telescopes around UT17:00 with a total effective exposure of a... | 2004-09-01 22:05:00 | x-ray,neutron star,pulsar,star,request for observations |
327 | Long duration X-ray burst from GX 3+1 | S. Brandt, N. Lund, J. Chenevez, C. Budtz-Jorgensen (DSRI, Copenhagen), P. Goldoni, G. Belanger, A. Goldwurm (CEA, Saclay), E. Kuulkers (ESA, ESTEC) | During an observation of the Galactic Center the JEM-X instrument on INTEGRAL detected an unusally long X-ray burst from GX 3+1. The burst began on August 31 at 18:57 UTC
After an precursor spike lasting 7 s where the burst reached a flux of about 2000 mCrab in the 4 to 20 keV band the flux fell to around 500 mCrab an... | 2004-09-02 17:11:00 | x-ray,neutron star,star,request for observations |
328 | IGRJ17331-2406 | A. Lutovinov (IKI, Moscow), M. Cadolle Bel (CEA, Saclay), G. Belanger (CEA, Saclay), A. Goldwurm (CEA, Saclay), C. Budtz-Jorgensen (DSRI, Copenhagen), N. Mowlavi (ISDC, Versoix), J. Paul (CEA, Saclay), A. Orr (ISOC/ESTEC, Noordwijk) | We report a discovery of a new transient source, IGR J17331-2406 with the IBIS telescope onboard the INTEGRAL observatory. The source position is RA=17h33m08s and DEC=-24o06m46s (equinox 2000), with uncertainty ~2', that is about 40 arcmin from the known X-ray pulsar GX1+4.
The source was detected during the observati... | 2004-09-08 19:17:00 | x-ray,gamma ray,pulsar,transient,request for observations |
329 | NTEGRAL discovered a new transient source IGRJ16465-4507 | A. Lutovinov (IKI, Moscow), J. Rodrigues (ISDC, Versoix, CEA, Saclay), C. Budtz-Jorgensen (DSRI, Copenhagen), S. Grebenev (IKI, Moscow), C. Winkler (ESA/ESTEC, Noordwijk) | The new transient source IGRJ16465-4507 was detected with the ISGRI detector of the IBIS telescope of the INTEGRAL observatory on 6-7 Sept., 2004. The best position derived from our analysis is RA=16h46.5m and DEC=-45o07.5m (equinox 2000, preliminary uncertainty ~2.5'). IGR J16465-4507 is therefore ~16 arcmin from the ... | 2004-09-09 02:48:00 | x-ray,transient,request for observations |
330 | Nova in M31 | Tzenev L. (IA, Sofia), Georgiev I.(IA, Sofia), Ovcharov E. (SU, Sofia), Stanev I. (SU, Sofia), Georgiev Ts. (IA, Sofia), Nedialkov P. (SU, Sofia) | NOVA IN M31
We report the discovery of an apparent nova located at R.A. = 0h42m42s.77, Decl. = +41o15'44".4 (equinox 2000.0), which is 17".4 west and 44".0 south of the center of M31. Available B magnitude and B-V colour from CCD images taken with the 2m NAO Rozhen telescope, Bulgaria: Aug. 22.040 UT, 17.956+/-0.030; ... | 2004-09-11 21:41:00 | optical,nova |
331 | INTEGRAL detects increased activity from 4U 0115+63 | J. A. Zurita Heras (ISDC, Versoix), S. E. Shaw (Southampton; ISDC, Versoix), I. Kreykenbohm (IAA, Tubingen), P. Kretschmar (ISDC, Versoix; MPE, Garching), Diego Gotz (IASF, Milano), S. Mereghetti (IASF, Milano), A. Lutovinov (IKI, Moscow), G. Palumbo (Bologna), T. Oosterbroek (ESTEC, Noordwijk), C. Budtz-Jorgensen (DSR... | During a Galactic Plane Scan on September 12th 2004, the INTEGRAL gamma ray observatory detected the high mass X-ray binary 4U 0115+63. Increased activity was first noticed by the IBAS gamma ray burst detection software at 14:53 UTC, leading to the generation of three alerts (1978-79-80). The source was visible in the ... | 2004-09-14 00:58:00 | x-ray,gamma ray,binary,gamma-ray burst,pulsar |
332 | High activity of XTE J1743-363 detected with INTEGRAL | S. A. Grebenev (IKI, Moscow), R. A. Sunyaev (IKI, Moscow & MPA, Garching) | During INTEGRAL Open Program observations of the Galactic center region on Sept. 18-20, 2004, an X-ray transient was detected by IBIS/ISGRI with the S/N ratio of 9.5 at the position, R.A.= 17h43m00s, Dec.= -36d21m30s (equinox 2000.0, error radius 2') consistent with that of XTE J1743-363 (IAUC # 7120 ). The source was ... | 2004-09-21 19:30:00 | radio,infra-red,optical,x-ray,transient,variables |
333 | 4U 0115+634 in outburst | J. Tueller, S. D. Barthelmy, H. Krimm, T. Okajima, S. Owens, P. Serlemitsos (NASA/Goddard Space Flight Center), A. Furuzawa, Y. Ogasaka, R. Shibata, K. Tamura, Y. Tawara, K. Yamashita (Nagoya Univ.), H. Kunieda JAXA/ISAS, M. Rex (U of Penn.) | The balloon-borne hard X-ray focusing telescope, InFOCuS, a collaboration between NASA/GSFC, Nagoya University, JAXA/ISAS and the University of Pennsylvania, observed transient X-ray pulsar 4U 0115+634. The pulsar is continuing in outburst as first detected by RXTE/ASM (http://xte.mit.edu/XTE.hmtl) during its observati... | 2004-09-24 01:18:00 | x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
334 | NOVA NEAR THE CENTER OF M31 | Tzenev L. (IA, Sofia), Georgiev I.(IA, Sofia), Ovcharov E. (SU, Sofia), Stanev I.(SU, Sofia), Kostov A. (IA, Sofia), Georgiev Ts. (IA, Sofia), Nedialkov P. (SU, Sofia) | NOVA NEAR THE CENTER OF M31
We report the discovery of an apparent nova located at R.A. = 0h42m44s.45, Decl. = +41o16'10".5 (equinox 2000.0), which is only 1".6 east and 1".1 north of the center of M31. Available B magnitude and B-V colour from CCD images taken with the 2m NAO Rozhen telescope, Bulgaria: Sept. 16.097 ... | 2004-09-25 12:14:00 | optical,nova |
335 | Radio observations of XTE J1743-363 | M. P. Rupen, V. Dhawan, A. J. Mioduszewski (NRAO) | Very Large Array (VLA) observations of the currently active X-ray source XTE J1743-363 (ATEL #332) on 24 September 2004 showed no strong sources at either 4.9 GHz (rms 84 microJy/beam) or 8.5 GHz (rms 155 microJy/beam) within the 2 arcminute INTEGRAL error circle. The only strong source is a 1.5 mJy source (uncorrected... | 2004-09-27 03:15:00 | radio,infra-red,optical,x-ray,binary,black hole,neutron star,star,transient,variables |
336 | IGR J16465-4507 counterpart | Juan A. Zurita Heras (ISDC), Roland Walter (ISDC) | XMM-Newton follow-up observation of the transient source IGR J16465-4507 detected by INTEGRAL on Sept. 6, 2004 (ATEL#329) was performed on Sept. 14, 2004 (02:16-04:45 UTC). A single counterpart is detected with the EPIC/MOS camera at position RA=16:46:35.5 DEC=-45:07:04 (J2000, uncertainty 4").
The X-ray flux (3+/-1)E... | 2004-10-02 02:57:00 | x-ray,gamma ray,transient |
337 | 4U 0115+63 Observations with RXTE | W. Coburn, E. Kalemci (UCB); P. Kretschmar (MPE/ISDC); I. Kreykenbohm (IAAT/ISDC); R. Rothschild (UCSD); R. Staubert (IAAT); J. Wilms (Warwick) | On MJD 53270.382 we observed the source 4U 0115+63 during outburst for ~20 ks with RXTE. The 2-10 keV flux during the observation was (6.75 +/- 0.06)x10**-9 ergs cm**-2 s**-1. Our preliminary analysis of the joint PCA/HEXTE phase averaged spectrum indicates the presence of the known ~12 keV cyclotron line, along with u... | 2004-10-02 05:30:00 | x-ray,binary,neutron star,star |
338 | Circumstantial evidence for a blue supergiant companion of IGR J16465-4507 | D. M. Smith (Physics Department and Santa Cruz Institute for Particle Physics, U. C. Santa Cruz) | The 2MASS counterpart to IGR J16465-4507 (ATEL #329) identified by Heras and Walter (ATEL #336) is also a bright star in the USNO B1.0 catalog, 0448-0520455, with the magnitudes shown in the table below. Its short outburst and high duty cycle of quiescence suggest a similarity with the systems XTE J1739-302 (ATEL #181,... | 2004-10-06 06:41:00 | infra-red,optical,x-ray,binary,pulsar,star,transient |
339 | he likely optical counterpart to the X-ray transient IGR J01363+6610 | FORTH & University of Crete | We report photometric and spectroscopic optical observations of the likely optical counterpart to the X-ray transient IGR J01363+6610 discovered by INTEGRAL (Grebenev et al., ATel 275). The photometric and red-end spectroscopic observations were made from the 1.3-m telescope of the Skinakas Observatory (Crete, Greece),... | 2004-10-08 20:55:00 | radio,optical,x-ray,binary,neutron star,star,transient |
340 | INTEGRAL discovery of a possible new source IGR J18410-0535 | J. Rodriguez (CEA, Saclay & ISDC Versoix), A. Domingo Garau (LAEFF, Vilspa), S. Grebenev (IKI, Moscow), A. Parmard (ESTEC, Noordwijk), J.-P. Roques (CESR, Toulouse), V. Schonfelder (MPE, Garching), P. Ubertini (IASF, Roma), R. Walter (ISDC, Versoix), N.-J. Westergaard (DSRI, Copenhagen) | We report on the detection of a possible new source with the IBIS/ISGRI detector aboard the INTEGRAL observatory. The source, IGR J18410-0535, was discovered during Galactic Plane Deep Exposure, on October 8 2004 ~7h50 UTC, as it was undergoing a ~70 mCrab flare (integrated over 1700 s) in the 20-60 keV energy range, a... | 2004-10-09 00:18:00 | x-ray,gamma ray,binary,black hole,neutron star,pulsar,star,transient,request for observations |
341 | IGR J18410-0535 = AX J1841.0-0536 ? | J. P. Halpern, E. V. Gotthelf (Columbia U.) | We note that the INTEGRAL source IGR J18410-0535 reported by Rodriguez et al. (ATEL #340) is possibly an outburst of the transient 4.74 s X-ray pulsar AX J1841.0-0536, which in turn was identified using Chandra with a Be star counterpart at coordinates (J2000) 18h41m00.43s, -05d35'46.5" (Halpern et al., ATEL #289). The... | 2004-10-09 07:08:00 | optical,x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
342 | New X-ray transient IGR J17507-2856 discovered with INTEGRAL | S. A. Grebenev (IKI, Moscow), R. A. Sunyaev (IKI, Moscow; MPA, Garching) | We report on the discovery with INTEGRAL of a new X-ray source 1.3 deg off the Galactic center. This source, IGR J17507-2856, was detected with IBIS/ISGRI on Sept. 18-23, 2004, during Open Program observations of the region. The S/N ratio was 6.9 in the 18-45 keV mosaic image, the corresponding average flux was 2.98+/-... | 2004-10-11 19:11:00 | radio,far-infra-red,infra-red,x-ray,black hole,neutron star,star,transient |
343 | The likely optical counterpart to the X-ray transient IGR J01363+6610 (Resubmission of ATel#339) | Pablo Reig (FORTH & University of Crete), Ignacio Negueruela (University of Alicante, Spain), Antonis Manousakis (University of Crete), Amparo Marco (University of Alicante) and Giannis Papamastorakis (University of Crete) | After the submission of ATel #339 a few formatting inconsistencies and some missing/incorrect information were spotted. This is the corrected version of ATel #339. It also contains new information concerning the association of the proposed counterpart with the Halpha emission line star [KW97] 6-30.
We report photometr... | 2004-10-12 17:47:00 | radio,optical,x-ray,binary,neutron star,star,transient |
344 | Optical/IR Candidates for XTE J1829-098 | J. P. Halpern, E. V. Gotthelf (Columbia U.) | A very bright star in the 2MASS survey should be considered a possible supergiant companion of the transient 7.8 s pulsar XTE J1829-098 (Markwardt et al., ATEL #317; Halpern & Gotthelf, ATEL #319). At coordinates (J2000) R.A. = 18h29m44.55s, Decl. = -09d51m20.3s, this candidate has R>21, I=14.4, J=8.04, H=6.11, K=4.98,... | 2004-10-13 07:34:00 | infra-red,optical,x-ray,binary,neutron star,pulsar,star,transient |
345 | Flares from a new Integral hard X-ray source, IGR J17407-2808, likely associated with the ROSAT source SBM 10 | P. Kretschmar (MPE/ISDC, Versoix), S. Mereghetti (IASF, Milano), W. Hermsen (SRON, Utrecht), P. Ubertini (IASF, Roma), C. Winkler (ESTEC, Nordwijk), S. Brandt (DSRI, Copenhagen), R. Diehl (MPE, Garching) | On Oct 9, 2004 Integral observed hard X-ray flares from a source located at R.A.=17h 40.7m, Dec.=-28s 08' (J2000, error radius 2.3').
This new hard X-ray source, IGR J17407-2808, is positionally coincident with a faint ROSAT source listed as no. 10 in the catalogue of sources in the Galactic Center region by Sidoli, B... | 2004-10-14 22:14:00 | x-ray,gamma ray,transient |
346 | Nova in M31 | Tzenev L. (IA, Sofia), Ovcharov E. (SU, Sofia), Stanev I. (SU, Sofia), Georgiev Ts. (IA, Sofia), Georgiev I. (IA, Sofia), Nedialkov P. (SU, Sofia) | We report the discovery of an apparent nova located at R.A. = 0h42m51s.98, Decl. = +41o16'20".8, which is 1'55".1 east and 11".4 north of the center of M31. Available B magnitude and B-V colour from CCD images taken with the 2m NAO Rozhen telescope, Bulgaria: Sept. 9.896 UT, 19.11+/-0.05; -0.39+/-0.10. | 2004-10-15 00:58:00 | optical,nova |
347 | The Orbital Period of the SMC X-ray Pulsar XTE J0055-727 | R. H.D. Corbet (NASA/GSFC and USRA), C. B. Markwardt (NASA/GSFC and University of Maryland), F. E. Marshall (NASA/GSFC), M. J. Coe, W. R.T. Edge, J. L. Galache (Southampton University), S. Laycock (CfA) | Regular monitoring of the Small Magellanic Cloud with the RXTE Proportional Counter Array has revealed a periodicity in the pulsed flux from the 18.4s X-ray pulsar XTE J0055-727, initially found to be active in November/December 2003 (Corbet et al. 2003, ATEL #214). The source was then not detected in weekly monitoring... | 2004-10-16 04:58:00 | optical,x-ray,binary,neutron star,pulsar,star,transient |
348 | Radio Observations of SNe 2004dx and 2004eh | A. M. Soderberg (Caltech), D. A. Frail (NRAO) and S. R. Kulkarni (Caltech) | We observed the optical position of Type Ibc SNe 2004dx (IAUC # 8392 ) and 2004eh (IAUC # 8401 ) on 2004 October 28.2 UT with the Very Large Array. We do not detect a radio counterpart to either supernova and place 2-sigma limits of 78 and 48 microJy for SN2004dx and SN2004eh, respectively. | 2004-10-29 06:29:00 | radio,optical,supernovae |
349 | Transient Pulsar V0332+53 in Outburst | J Swank(NASA/GSFC), R. Remillard(MIT), E. Smith (NASA/GSFC) | The 4.4 s pulsar V0332+53 in the 34.2 d binary with BQ Cam averaged 142 +/- 6 mCrab as seen with the RXTE ASM on MJD 53337 (Nov. 28). In 1-day ASM bins (production data), the first ASM detection of the current outburst occured on MJD 53332, when the average flux (2-12 keV) was 22 +/- 4 mCrab. A similar flux was seen th... | 2004-11-29 22:13:00 | optical,x-ray,binary,pulsar,transient,request for observations |
350 | New X-ray transient IGR J11435-6109 discovered with INTEGRAL | S. A.Grebenev (IKI, Moscow), P. Ubertini (IASF, Roma), J. Chenevez (DSRI, Kopenhagen), N. Mowlavi (ISDC, Versoix), J.-P. Roques (CESR, Toulouse), N. Gehrels (NASA/GSFC, Greenbelt), E. Kuulkers (ESTEC, Noordwijk) | A new hard X-ray transient, IGR J11435-6109, was discovered with the IBIS/ISGRI telescope on board INTEGRAL on Nov. 23, 2004, during observations (3 successive pointings at 12:30-14:20 UTC) dedicated to the Galactic Plane Scan. The source was located 1 deg off the known X-ray pulsar twins, 4U1145-619 and 1E1145.1-6141,... | 2004-11-30 00:06:00 | radio,infra-red,optical,x-ray,binary,black hole,neutron star,pulsar,star,transient,request for observations |
351 | Radio Observations of SN2004gk | A. M. Soderberg, S. R. Kulkarni (Caltech) and D. A. Frail (NRAO) | We observed the Type Ic SN2004gk (IAUC # 8446 ) with the Very Large Array at 8.5 GHz on 2004 Nov 30.57 UT. We do not detect radio emission from the supernova and place a 2-sigma limit of 0.10 mJy at the optical position. Assuming a distance of 15 Mpc to the SN host galaxy (IC 3311), this VLA observation implies an uppe... | 2004-12-01 07:23:00 | radio,optical,supernovae |
352 | IGR J00291+5934, a new X-ray transient discovered with INTEGRAL | D. Eckert, R. Walter (ISDC, Versoix, Switzerland), P. Kretschmar (MPE, Garching, Germany), M. Mas-Hesse (LAEFF, Madrid, Spain), G. G.C Palumbo (University di Bologna, Italy), J.-P. Roques (CESR, Toulouse, France), P. Ubertini (IASF, Roma, Italy), C. Winkler (ESTEC, Noordwijk, The Netherlands) | A new transient X-ray source was discovered with the IBIS/ISGRI and JEM-X detectors on board INTEGRAL on Dec. 2, 2004, during 3 successive pointings dedicated to the Galactic Plane Scan. The source was located with both ISGRI and JEM-X at R.A.= 00h 29.1', Dec.= +59d 34m, (equinox 2000.0) with an error radius of 1.5'. T... | 2004-12-03 19:01:00 | x-ray,gamma ray,binary,black hole,cataclysmic variable,neutron star,pulsar,star,transient,variables |
353 | IGR J00291+5934 is a 598 Hz X-ray Pulsar | C. B. Markwardt (U. Maryland and GSFC), J. H. Swank (GSFC), T. E. Strohmayer (GSFC) | IGR J00291+5934 (Eckert et al. 2004, ATel #352) was observed by the RXTE PCA instrument on Dec. 3, 2004 at 06:17 (UTC) for approximately 2000 seconds exposure. The source was detected with a flux of 35 mCrab (2-10 keV).
Pulsations were detected at a barycentric frequency of 598.88 Hz, with a pulsed amplitude of approx... | 2004-12-05 04:29:00 | x-ray,binary,neutron star,pulsar,star,transient |
354 | IGR J00291+5934 Optical Counterpart | Derek B. Fox and S. R. Kulkarni (Caltech) | We have observed the localization of the Integral transient IGR J00291+5934 (ATEL #352) with the Robotic Palomar 60-inch Telescope, in seven 120-s R-band exposures extending from 05:59 to 06:15 UT on 4 December 2004. Comparison of our images to the Digitized Sky Survey reveals the presence of a single new, bright, stat... | 2004-12-05 04:20:00 | optical,x-ray,binary,neutron star,pulsar,star,transient |
355 | IGR J00291+5934 - radio observation | Guy Pooley (MRAO, Cavendish Lab, Cambridge UK) | An observation of IGR J00291+5934 (ATEL #352) with 5 antennas of the Ryle Telescope, Cambridge, UK at 15 GHz resulted in a probable detection at 1.1 mJy. The observation was for 5 hours from 2004 Dec 04 17h10m, and was centred on the original position from the INTEGRAL satellite. The detection was the strongest signal ... | 2004-12-06 00:11:00 | radio,optical,x-ray,transient |
356 | Spectroscopic observations of the counterpart of IGR J00291+5934 | G. Roelofs (Univ. of Nijmegen), P. G. Jonker, D. Steeghs, M. Torres (CfA), G. Nelemans (Univ. of Nijmegen) | Spectroscopic observations of the optical counterpart of the millisecond X-ray pulsar IGR J00291+5934 (Atel #352, 353) reported in an Atel by Fox & Kulkarni were obtained (Dec 5 00:29-01:15 UT) with the ISIS spectrograph mounted on the 4.2m William Herschel Telescope on La Palma. Weather conditions were not optimal wit... | 2004-12-06 03:11:00 | optical,x-ray,binary,neutron star,pulsar,star,transient |
357 | ASM Observations of IGR J00291+5934 | Ron Remillard (for ASM team at MIT and GSFC) | A mission-long light curve (Jan. 1996 - Dec. 2004) has been constructed for IGR J00291+5934 (Atel #352),using the position of the optical counterpart (Atel #354). The results quoted below utilize only the dwells for which the fitted channel-A background has values less than 12.0 c/s. For the current outburst, the first... | 2004-12-07 00:59:00 | optical,x-ray,pulsar,transient |
358 | Another X-Ray Brightening of H 1743-322 = IGR J1746-3213 | J. H. Swank(GSFC) and C. B. Markwardt (U. Maryland and GSFC) | On Dec. 4, 2004 at 03:42 UT RXTE observed the source IGR J11435-6109 that was recently discovered with INTEGRAL's IBIS/ISGRI. (ATEL #350). The pointing position was offset to insure no contribution in the PCA from nearby 4U 1145-619 and 1E1145.1-6141. An average net count rate of 1.7/s was observed over 896 s. Variatio... | 2004-12-07 10:33:00 | x-ray,pulsar,transient,request for observations |
359 | IGR J11435-6109: Faded, but Variable - Possibly ~ 166 s Pulsations | J. H. Swank(GSFC) and C. B. Markwardt(U Maryland and GSFC) | The title of ATEL #358 was a product of submission error. Please ignore.
On Dec. 4, 2004 at 03:42 UT RXTE observed the source IGR J11435-6109 that was recently discovered with INTEGRAL's IBIS/ISGRI. (ATEL #350). The pointing position was offset to insure no contribution in the PCA from nearby 4U 1145-619 and 1E1145.1-... | 2004-12-07 11:04:00 | x-ray,binary,pulsar,transient,variables |
360 | Orbit Solution for the Millisecond Pulsar IGR J00291+5934 | C. B. Markwardt (U. Maryland & GSFC), D. K. Galloway (MIT), D. Chakrabarty (MIT), E. H. Morgan (MIT), T. E. Strohmayer (GSFC) | The INTEGRAL Transient IGR J00291+5934 (ATEL #352), now known to be a 1.67 millisecond X-ray pulsar (ATEL #353), was observed by the RXTE PCA on Dec 5 and 6. The source has decayed to approximately 27 mCrab (2-10 keV).
The data were barycentered using the Fox & Kulkarni optical counterpart position (ATEL #354). Pulsat... | 2004-12-07 11:07:00 | optical,x-ray,binary,neutron star,pulsar,star,the sun,transient |
361 | The radio counterpart of IGR J00291+5934 | Rob Fender (Southampton), Ger de Bruyn (ASTRON / Groningen),Guy Pooley (MRAO Cambridge), Ben Stappers (ASTRON) | We report further observations of the proposed radio counterpart to the accreting millisecond X-ray pulsar IGR J00291+5934.
Following the report of a possible ~1.1 mJy radio counterpart at 15 GHz on 2004 Dec 4 (ATEL #355), further observations with the Ryle Telescope (12 hr from 2004 Dec 05 13h41m UT) did not detect t... | 2004-12-07 23:18:00 | radio,optical,x-ray,pulsar,transient |
362 | BeppoSAX-WFC observations of IGR J11435-6109 and J00291+5934 | Jean in 't Zand & John Heise (SRON) | The BeppoSAX Wide Field Cameras database entails 225 useful X-ray observations of the recently identified X-ray transient IGR J11435-6109 (ATel 350) obtained from July 1996 to April 2002. The net exposure time is 3.6 Msec. The data exhibit detections on 5 separate occasions: 21/22-jul-1996, 10/11-sep-1996, 11-apr-1997,... | 2004-12-09 05:20:00 | x-ray,binary,neutron star,pulsar,star,transient |
363 | IGR J00291+5934 : IR counterpart detection and evidence of fading | D. Steeghs, C. Blake, J. S. Bloom, M. A. P. Torres, P. G. Jonker (Harvard-Smithsonian Center for Astrophysics), D. Starr (Gemini, Hawaii) | We report on the detection of IGR J00291+5934 (ATEL #352) at infrared wavelengths using the 1.3m robotic PAIRITEL telescope (http://pairitel.org) on Mt. Hopkins, AZ.
The IR counterpart for the accreting pulsar was detected on 2004 Dec 8 05:15 UT under cloudy conditions with PAIRITEL. Using nearby 2MASS comparison star... | 2004-12-10 03:33:00 | infra-red,optical,x-ray,binary,neutron star,nova,pulsar,star,transient |
364 | Further radio observations of IGR J00291+5934 | M. P. Rupen (GSFC/NRAO), V. Dhawan, A. J. Mioduszewski (NRAO) | Very Large Array (VLA) observations of the millisecond pulsar IGR J00291+5934 (ATEL #352, ATEL #353) give a clear detection with a flux density of 0.17 +/- 0.05 mJy at 4.86 GHz on 9 December 2004 (MJD 53348.354). This flux density basically agrees with that measured by Fender et al. at nearly the same frequency on 6-7 ... | 2004-12-10 04:00:00 | radio,optical,x-ray,binary,neutron star,pulsar,star,transient |
365 | IGR J00291+5934 X-ray Decay Rate is Increasing | J. H. Swank (NASA/GSFC) & C. B. Markwardt (U. Maryland & GSFC) | RXTE continues to monitor the millisecond X-ray pulsar IGR J00291+5934. The X-ray flux has decayed from a maximum of 29 mCrab (2-10 keV) on Dec 3, to less than 10 mCrab on Dec 11, 14:00 UTC.
Overall, the X-ray decay has been quite linear. However, within the past day, the rate of decline has increased slightly. If the... | 2004-12-12 05:23:00 | x-ray,binary,neutron star,pulsar,star,transient |
366 | Keck Optical Spectra of the Counterpart of IGR J00291+5934 Keck Optical Spectra of the Counterpart of IGR J00291+5934 | A. V. Filippenko, R. J. Foley (University of California, Berkeley), P. J. Callanan (Cork University) | Inspection of CCD spectra (range 320-940 nm) obtained on Dec. 12 UT with the Keck I 10-m telescope (+ LRIS; integration time 300 s on each of the blue and red sides) shows that the object detected by Fox & Kulkarni (ATEL #354) does indeed appear to be the optical counterpart to IGR J00291+5934 (ATEL #352), as was also ... | 2004-12-13 18:44:00 | optical,binary,neutron star,pulsar,star,transient |
367 | Outburst from EXO 2030+375 detected with INTEGRAL | D. Gotz (IASF, Milano), J. A. Zurita Heras (ISDC, Geneva), C. Winkler (ESTEC), N. Gehrels (NASA/GSFC), S. Martinez-Nunez (Valencia), A. Bazzano (IASF, Roma), Alexander Lutovinov (IKI, Moscow) | The HMXB pulsar EXO2030+375 was observed by INTEGRAL in a galactic plane scan on December 14, 2004 from 10:46:43 to 14:29:08 UTC. The 20-60 keV flux averaged on single pointings of 2200 sec increased from 93 to 214 mCrab. EXO 2030+375 was in the JEMX FOV during one pointing and was detected with average fluxes of 45 an... | 2004-12-15 20:09:00 | x-ray,gamma ray,binary,neutron star,pulsar,star |
368 | Radio observations of Type Ic SN 2004gq | A. M. Soderberg (Caltech), S. R. Kulkarni (Caltech), D. A. Frail (NRAO) | We observed the optical position of the Type Ic SN 2004gq (IAUC # 8452 ) using the Very Large Array on 2004 Dec 16.20 UT. At 8.5 GHz we clearly detect the SN with a flux density of 2.0 +- 0.05 mJy. Assuming an explosion date between Dec 4.38 and 11.93 (based on optical photometry) places our radio measurement at t ~ 4.... | 2004-12-17 03:00:00 | radio,optical,gamma ray,gamma-ray burst,supernovae |
369 | IGR J00291+5934: an observation with Chandra | M. A. Nowak (MIT-CXC), A. Paizis (ISDC Geneva / IASF Milano), J. Wilms (Department of Physics, University of Warwick), K. Ebisawa (NASA - GSFC / ISDC Geneva), T. J.-L. Courvoisier (ISDC Geneva), J. Rodriguez (CEA Saclay / ISDC Geneva), R. Walter (ISDC Geneva), M. Del Santo (IASF Roma), P. Ubertini (IASF Roma) | We have performed a preliminary analysis of a Chandra observation of IGR J00291+5934 that lasted 18 ksec, from 2004-12-14T02:43:41 to 2004-12-14T08:02:38 (UT time). | 2004-12-18 00:30:00 | radio,infra-red,optical,x-ray,binary,neutron star,pulsar,star,transient |
370 | Optical counterpart to IGR J11435-6109 | José Miguel Torrejón, Ignacio Negueruela (Universidad de Alicante) | Optical observations of the field of the 162-s pulsar IGR J11435-6109 (ATel #350, #359, #362) were conducted during the nights of December 14th and 15th with the 3.5-m NTT (La Silla) as backup for another programme.
As a likely identification of the INTEGRAL source with 1RXS J114358.1-610736 had been proposed (ATel #3... | 2004-12-20 20:36:00 | optical,x-ray,binary,pulsar,star,transient |
371 | Continued X-ray Brightening of V0332+53 | Ron Remillard (for ASM team at MIT and GSFC) | The XTE All-Sky monitor shows continued brightening of V0332+53, with an average flux of 1.1 Crab (2-12 keV) during the first half of 2004 Dec. 22. The true flux is certain to be substantially higher since the source is extremely hard, even for X-ray pulsars. The ASM count rate is evaluated here using cameras 2 and 3 o... | 2004-12-22 23:21:00 | x-ray,pulsar,transient |
372 | INTEGRAL hard X-ray observation of V0332+53 | M. Turler (ISDC, Geneva Observatory), G. Di Cocco (IASF/CNR, Bologna), R. Diehl (MPE, Garching), S. Maisala (University of Helsinki), M. Mas-Hesse (LAEFF, Madrid), N. Mowlavi (ISDC, Geneva Observatory), A. Orr (ESTEC, Noordwijk), J. Paul (CEN, Saclay), R. A. Sunyaev (IKI, Moscow & MPA, Garching) | The steadily brightening pulsar V0332+53 (Remillard et al. 2004 ATEL #371) was in the INTEGRAL field of view (FoV) for 2.2 ksec during a routine Galactic Plane Scan observation starting on Dec. 26, 2004 at 12:48:30 UT. The source was located at the border of the IBIS FoV (13.4 deg from the center) and thus could not be... | 2004-12-29 00:55:00 | x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
373 | RADIO DETECTION OF SGR 1806-20 FOLLOWING A GIANT FLARE | B. M. Gaensler (CfA), C. Kouveliotou (NASA/MSFC, NSSTC), R. Wijers (University of Amsterdam), M. Garrett (JIVE), M. Finger, P. Woods, S. Patel (USRA, NSSTC), M. McLaughlin (Jodrell Bank) report on behalf of a larger team: | We observed the soft gamma-ray repeater SGR 1806-20 with the Very Large Array, approximately 7 days after the detection of a Giant Flare from the source (Borkowski, J. et al., 2004, GCN # 2920), on January 3, 2005 for one hour (19:46-20:46 UT). At frequencies of 1.4, 4.9 and 8.5 GHz, we detect an unresolved radio sourc... | 2005-01-04 04:36:00 | radio,x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient,variables |
374 | M101 ULX-1 Brightens | GSFC & LHEA | A series of four Chandra observations since 22 December 2004 show that M101 ULX-1 (CXO KM101 J140332.74+542102, the subject of Atels #222, 305, 306, and 311) has brightened significantly.
The count-rate of the first two observations is too low to allow spectral fitting. The spectrum from the 30 Dec 2004 observation pr... | 2005-01-04 09:16:00 | optical,x-ray,binary,transient,variables |
375 | Second-epoch VLA observations of SGR 1806-20 | B. M. Gaensler (CfA), C. Kouveliotou (NASA/MSFC, NSSTC), R. Wijers (U. Amsterdam), M. Garrett (JIVE), M. Finger, P. Woods, S. Patel (USRA, NSSTC), M. McLaughlin (Jodrell Bank), R. Fender (U. Southampton), T. Delaney (CfA) report on behalf of a larger team: | We observed the soft gamma-ray repeater SGR 1806-20 with the Very Large Array (VLA) in the A-configuration for a second time on January 4, 2005 for one hour (14:15-15:15 UT). We detect the source at the same coordinates as reported by Gaensler et al. (GCN #2929; ATEL #373). Preliminary flux levels, including improved e... | 2005-01-04 23:31:00 | radio,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient,variables |
376 | Radio observations of SNLS-04D2jz | Avishay Gal-Yam (Caltech) | A. Gal-Yam, A. Soderberg and M. Sullivan report for a larger collaboration: We have observed with the Very Large Array (VLA) the location of supernova SNLS-04D2jz, discovered on November 21, 2004 by the Supernova Legacy Survey (SNLS), using Megacam mounted on the 3.6m CFHT telescope. Spectroscopy obtained by R. Ellis a... | 2005-01-05 05:58:00 | radio,optical,gamma ray,gamma-ray burst,supernovae |
377 | The Orbital Period of IGR J11435-6109 | R. H.D. Corbet (NASA/GSFC and USRA) and R. Remillard (MIT) | The power spectrum of the Rossi X-ray Timing Explorer All Sky Monitor light curve of IGR J11435-6109 (ATEL #350, #358, #359, #362) obtained between 1996 January 5 and 2004 December 30 shows significant modulation at a period of 52.5 days. This confirms the orbital period proposed by in 't Zand & Heise (2004, ATEL #362)... | 2005-01-06 00:43:00 | x-ray,binary,neutron star,pulsar,star,transient |
378 | Possible identification of the 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 recent radio detection of SGR 1806-20 (Gaensler et al. 2005, GCN 2929) which provided an unprecedented positional accuracy (at the level of 0.1"), we re-analysed all the VLT NACO images of the field (in J, H and Ks bands) we collected in 2004 after the X-ray burst activity from the source detected during ... | 2005-01-06 02:27:00 | radio,infra-red,x-ray,gamma ray,soft gamma-ray repeater |
379 | M31 optical transient | R. Quimby, P. Mondol, and F. Castro (University of Texas) | We report the detection of an optical transient in M31 using ROTSE-IIIb at the McDonald observatory, Texas. The transient is located at 00h42m28.17s +41o09'55".5. We note this is about 5" from the Chandra X-ray point source CXOM31 J004228.1+410959 (Kong et al. 2002, ApJ 577,738). Unfiltered images taken on Dec. 26.06 U... | 2005-01-06 04:03:00 | optical,x-ray,nova,transient |
380 | Fourth Epoch observations of SGR 1806-20 | P. B. Cameron (Caltech) and S. R. Kulkarni (Caltech) | We observed a fourth epoch of the position of SGR 1806-20 with the Very Large Array (VLA) in A-configuration on 2005 Jan 6.77 UT (t ~ 9.9 days after the giant flare. See GCN #2920, #2928, #2929, #2933, #2934, #2935, ATEL #373, #375). We find the following preliminary flux densities: Freq. Â Â Â Flux Density (GHz) Â ... | 2005-01-07 05:29:00 | radio,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,transient,variables |
381 | Multiple Cyclotron Lines in V0332+53 | W. Coburn (SSL/UCB), P. Kretschmar (MPE/ISDC), I. Kreykenbohm (IAAT/ISDC), V. A. McBride (Southampton University), R. E. Rothschild (CASS/UCSD), J. Wilms (Warwick) | As part of our continuing RXTE observing campaign of V0332+53 in outburst (ATEL #372, #371, #349), we obtained 63ks of good exposure time between 2004 December 24-26. We measured a 2-10keV flux of 2.6E-8 ergs/cm2/s with the PCA. In our RXTE spectrum, once a standard pulsar continua is fit there are clear, line-like res... | 2005-01-07 05:37:00 | x-ray,gamma ray,binary,neutron star,pulsar,star,transient |
382 | Public data available on INTEGRAL TOO observations of V0332+053 in outburst | S. Soldi, N. Produit (ISDC, Geneva), G. Belanger (CEA Saclay), S. Larsson (Stockholm observatory), G. Palumbo (Bologna University), A. Santangelo (Tubingen University), O. R. Williams (ISOC), C. Winkler (ESTEC, Noordwijk) | INTEGRAL performed a TOO observation of the outburst of the pulsar V0332+53 (ATEL #381, #372, #371, #349) from 2005 January 6 to 10. About 110 ksec of good data were obtained. During the observation, the source was still very bright with a mean flux of ~650 mCrab in the 20-60 keV band. The multi-instrument spectrum of ... | 2005-01-12 19:52:00 | x-ray,gamma ray,pulsar,transient |
383 | Optical Outburst of the Halo Black Hole X-ray Transient XTE J1118+480 | C. Zurita (IAC), D. RodrÃguez (M-1 group), P. RodrÃguez-Gil (IAC), J. Casares (IAC), T. Shahbaz (IAC), J. Acosta (IAC), G. Gómez-Velarde (IAC), C. Abajas (IAC), T. Muñoz-Darias (IAC) | We report the discovery of a new outburst of the black hole X-ray transient XTE J1118+480 (IAUC # 7418 , ATEL#64, #67). Observations carried out with the 0.8m IAC80 telescope at the Observatorio del Teide on UT 2005 Jan 9.26 show J1118+480(=KV UMa) at R=14.02, almost 5 mag brighter than the reported quiescent level (IA... | 2005-01-13 06:03:00 | optical,x-ray,binary,black hole,transient,request for observations |
384 | Faint X-ray Outburst in XTE J1118+480 | R. Remillard (MIT), M. Garcia, M. A. P. Torres, D. Steeghs (SAO), and the ASM team at MIT and GSFC | The RXTE All-Sky monitor shows new detections of the black hole binary, XTE J1118+480, reported to be in optical outburst (ATEL #383). The source is first seen on 2005 January 9, with an average flux of 15(4) mCrab at 2-12 keV. The flux increases only slightly to 16(3) mCrab on Jan. 10, and to 19(3) mCrab on Jan. 11. T... | 2005-01-13 06:42:00 | optical,x-ray,binary,black hole,transient |
385 | Radio detection of XTE J1118+480 at 15 GHz | G. G.Pooley | A renewed optical and X-ray outburst of the Black Hole candidate XTE J1118+480 is reported in ATEL#383 and ATEL#384. A radio observation at 15 GHz was made with the Ryle Telescope at Cambridge from 2005 Jan 12 21h59m to Jan 13 09h57m (UT). The mean flux density was 8.7 mJy, with an increase of about 10% during the 12-h... | 2005-01-13 18:32:00 | radio,optical,x-ray,black hole,transient,request for observations |
386 | Optical Outburst of XTE J1118+480 | U. Kiziloglu (METU), S. Balman (METU), A. Baykal (METU), E. Gogus (SU), A. Alpar (SU), C. Inam (Baskent) | We report the monitoring of black hole X-ray transient XTE J1118+480(=KV UMa) during its new optical outburst and faint X-ray outburst. The data is obtained with the ROTSE IIId telescope (Robotic Optical Transient Search Experiment III) at TUG (Tubitak National Observatory) Antalya, Turkey (IAUC# 7418 , ATEL#64, #67, #... | 2005-01-14 01:34:00 | optical,x-ray,binary,black hole,transient,request for observations |
387 | Further radio observations of XTE J1118+480 | M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO) | Very Large Array (VLA) observations of the black hole candidate binary XTE J1118+480 (e.g., ATEL #383, ATEL #384, ATEL #386) confirm Pooley's report of renewed radio activity (ATEL #385). All data were observed on MJD 53383.32-.35, overlapping the end of Pooley's observations. A preliminary reduction gives the followin... | 2005-01-14 05:50:00 | radio,optical,x-ray,binary,black hole,transient |
388 | Optical observations of BQ Cam (=V0332+53) in outburst | Nicola Masetti, Mauro Orlandini (INAF - IASF, Bologna), Silvia Marinoni (INAF - Oss. Astron. Bologna) and Andrea Santangelo (Universitaet Tuebingen) | We have observed BQ Cam, the optical counterpart of the X-ray binary source V0332+53, which is now undergoing an outburst (see ATel #349, #371). Optical Spectroscopy and V-band photometry were acquired on January 7, 2005, between the two INTEGRAL pointings described in ATel #382, with the "G.D. Cassini" 152 cm Loiano t... | 2005-01-15 00:46:00 | optical,x-ray,binary,neutron star,star,transient |
389 | Optical Variability in XTE J1118+480 | R. I. Hynes (Louisiana State University), T. K. Watson (Southwestern University), D. E. Winget, E. L. Robinson (University of Texas at Austin) | High time-resolution (1-sec) white light photometry of the outbursting black hole XTE J1118+480 (ATEL #383, #384, #385, #386, #387) was obtained with the Argos CCD photometer on the McDonald Observatory 2.1m telescope on 2005 January 13.35. Significant optical variability was detected on timescales shorter than 100s, w... | 2005-01-15 01:20:00 | optical,binary,black hole,transient |
390 | RXTE PCA Observations of XTE J1118+480 | Jean Swank (GSFC), Craig Markwardt (GSFC/UMD) | RXTE had pointed observations of XTE J1118+480 for 660 and 960 seconds, respectively, on Jan. 13, 2005 at 6:31 UT and Jan 14, 3:17 UT. The average spectra were well fit with a power law of photon index 1.8 and an iron line with 42 eV equivalent width. The fluxes were equivalent to 20 and 21 mCrab 2-10 keV. With as much... | 2005-01-15 07:50:00 | x-ray,binary,black hole,transient |
391 | Type determination for SN 2004gw and SN 2005D | Avishay Gal-Yam (Caltech) | Avishay Gal-Yam reports for the Caltech Core-Collapse Program (CCCP): We have observed the unidentified supernovae SN 1994gw (Puckett & Ireland et al., IAUC # 8459 ), and SN 2005D (Burket & Li, IAUC # 8464 ) with the DBSP spectrograph mounted on the 200" Hale Telescope at Palomar observatory. Preliminary analysis shows... | 2005-01-16 09:26:00 | optical,supernovae |
392 | Spectroscopic identification of supernovae | Avishay Gal-Yam (Caltech) | Avishay Gal-Yam reports the following spectroscopic observations of supernovae by the CCCP, all obtained with the DBSP spectrograph mounted on the 200" Hale telescope at Palomar Observatory: A spectrum of SN 2005E (Graham & Li, IAUC # 8465 ) indicates a type Ib, consistent with the identification by Foley & Filippenko ... | 2005-01-16 21:36:00 | optical,supernovae |
393 | Infrared Observations of XTE J1118+480 | R. I. Hynes (Louisiana State Univ.), D. M. Gelino (Caltech), K. J. Pearson (Louisiana State Univ.), E. L. Robinson (Univ. of Texas) | Infrared observations of the outbursting black hole XTE J1118+480 (ATEL #383) were performed using SQIID on the Kitt Peak National Observatory 2.1m telescope. Observations spanning 2005 January 15.42-15.58 found it somewhat fainter than the previous outburst (IAUC # 7394 , # 7407 ), at average brightness J=12.91+/-0.03... | 2005-01-17 22:24:00 | infra-red,binary,black hole,transient |
394 | IGR J00234+6141: A new weak hard X-ray source found by INTEGRAL | P. R. den Hartog (1), L. Kuiper (1), W. Hermsen (1, 2), J. Vink(1), J. J.M. in 't Zand (1, 3), R. H.D. Corbet (4), R. Remillard (5) (1 SRON Utrecht; 2 University of Amsterdam; 3 University of Utrecht; 4 NASA/GSFC and USRA; 5 MIT) | We report the discovery by INTEGRAL of a new hard X-ray source, IGR J00234+6141. This source was detected accumulating data from different observations in December 2003 and February 2004 resulting in a 1.6-Ms exposure targeting the Cassiopeia region. The source is weak with a flux of 1.20 +/- 0.15 mCrab and a detection... | 2005-01-19 17:45:00 | radio,x-ray,gamma ray,binary,neutron star,star |
395 | Optical monitoring of IGR J00291+5934 | I. Bikmaev, V. Suleimanov, A. Galeev, N. Sakhibullin (KSU/AST), A. Alpar (SU), Z. Aslan, I. Khamitov (TUG), R. Burenin, M. Pavlinsky (IKI), R. Sunyaev (MPA/IKI) | We have photometrically monitored the optical transient associated with the accretion-powered millisecond pulsar IGRJ00291+5934 (ATEL352,353,354,363) during the period of December 11, 2004 - January 13, 2005, with Russian-Turkish 1.5-m optical telescope (RTT150) at Bakirlitepe (Antalya, Turkey). The R-band light curve ... | 2005-01-25 00:03:00 | optical,x-ray,binary,neutron star,pulsar,star,transient |
396 | Type determination for SN 2004M | 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... | We report that a spectrum (range 330-990 nm) of SN 2005M (IAUC # 8470 ), obtained Jan 24.52 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, shows it to be a type Ia SN most similar to SN 1991T about 12 days before maximum. Weak Ca II H&K and Fe III features are evident. The... | 2005-01-26 08:33:00 | optical,supernovae |
397 | Correction to ATEL #396: Type determination for SN 2005M | 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... | The title of ATEL #396 should read "Type determination for SN 2005M" | 2005-01-26 08:38:00 | optical,supernovae |
398 | Comet 69P/Taylor observed by LOSS/KAIT | University of California, Berkeley | W. Li, University of California at Berkeley, reports that Comet 69P/Taylor was serendipitously imaged by LOSS/KAIT [see Filippenko et al. 2001, in "Small-Telescope Astronomy on Global Scales," ed. W. P. Chen et al. (San Francisco: ASP), p. 121] on Jan 22.3322 UT in the field of the galaxy MCG +05-22-004. The position o... | 2005-01-26 08:58:00 | optical,comet |
399 | Periodic Humps in XTE J1118+480 2005 Outburst | Y. Chou (National Central University), A. Chen (National Cheng Kung University), P. S. Chiang (National Cheng Kung University), A. C. Chen (National Central University), Z. Y. Lin (National Central University), Y. Chung (National Central University) | We report the follow-up observations of the outbursting black hole X-ray transient XTE J1118+480 (KV UMa, ATEL #383, #384, #385, #386, #387, #389, #393) made by Lulin One-meter Telescope (LOT), Taiwan. The observations were started on UT 2005 Jan 16.74 and the source is still monitoring. The brightness of the source is... | 2005-01-26 15:30:00 | optical,x-ray,binary,black hole,transient,variables |
400 | 4.85 and 10.45 GHz observations of XTE J1118+480 following the VLA measurements | Emmanouil Angelakis, Alexander Kraus (Max Planck Instuitute for Radio Astronomy, Bonn) | Observations of the black hole candidate binary XTE J1118+480 have been carried out with the 100-m Radio Telescope at Effelsberg (Max Planck Institute for Radio Astronomy).
The observations took place during 2 time slots separated by roughly one day (between JD 2453384.47 and 2453385.41) starting approximately 1 day a... | 2005-01-27 06:00:00 | radio,binary,black hole,transient |
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