The Astronomer's Telegram: Star
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Star, from The Astronomer's Telegram en-us ATel 16551: AstroSat observation of SRGA J144459.2-604207 during a possible re-flare
https://www.astronomerstelegram.org/?read=16551
Aman Kaushik, Yash Bhargava, Sudip Bhattacharyya Aman Kaushik, Yash Bhargava, Sudip Bhattacharyya aman.kaushik@tifr.res.in Credentialed by: Yash Bhargava (yash.bhargava_003@tifr.res.in) The Astronomer's Telegram ATel16551 The new X-ray transient SRGA J144459.2-604207 was discovered with SRG/Mikhail Pavlinsky ART-XC telescope and reported on February 21, 2024 (ATel #16464). ... 2024-03-22T06:43:23-00:00 ATel 16548: Insight-HXMT long exposure hard X-ray observations of SRGA J144459.2-604207 enable accurate measurements of the spin and orbital parameters and the detection of pulsed emission up to 60 keV
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Zhaosheng Li, L. Kuiper, M. Falanga, R. X. Xu, Y. Y. Pan, S. N. Zhang, S. Zhang, J. L. Qu, L. M. Song, Y. P. Chen, S. M. Jia, X. B. Li, S. J. Zheng, Y. Huang, J. Poutanen Zhaosheng Li, L. Kuiper, M. Falanga, R. X. Xu, Y. Y. Pan, S. N. Zhang, S. Zhang, J. L. Qu, L. M. Song, Y. P. Chen, S. M. Jia, X. B. Li, S. J. Zheng, Y. Huang, J. Poutanen lizhaosheng@xtu.edu.cn Credentialed by: Zhaosheng Li (lizhaosheng@xtu.edu.cn) The Astronomer's Telegram ATel16548 SRGA J144459.2-604207 is a new X-ray transient discovered by the SRG/ART-XC (ATel #16464), and confirmed as an accreting millisecond X-ray pulsar by NICER (ATel #16474, ATel #16480). ... 2024-03-21T13:36:36-00:00 ATel 16532: XRISM/Xtend Transient Search (XTS) detected an X-ray flare from a plausible optical counterpart LP 593-21
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M. Yoshimoto, K. Hayashi, Y. Kanemaru, S. Ogawa, T. Yoshida, K. Akasu, M. Audard, E. Behar, S. Inoue, T. Kohmura, Y. Maeda, M. Mizumoto, N. Nemoto, M. Nobukawa, K. Pottschmidt, M. Shidatsu, Y. Terada, Y. Terashima, Y. Tsuboi, H. Uchida, T. Yoneyama M. Yoshimoto, K. Hayashi, Y. Kanemaru, S. Ogawa, T. Yoshida, K. Akasu, M. Audard, E. Behar, S. Inoue, T. Kohmura, Y. Maeda, M. Mizumoto, N. Nemoto, M. Nobukawa, K. Pottschmidt, M. Shidatsu, Y. Terada, Y. Terashima, Y. Tsuboi, H. Uchida, T. Yoneyama tsuboi@phys.chuo-u.ac.jp Credentialed by: Yohko Tsuboi (tsuboi@phys.chuo-u.ac.jp) The Astronomer's Telegram ATel16532 XRISM/Xtend Transient Search (XTS) detected an X-ray flare from a new X-ray source candidate XRISM J0335+0025 at 2024-03-09 TT. The source position is determined to be (R.A., Dec.) = (53.897 deg, 0.422 deg) with a systematic uncertainty of ~ 40 arcsec. ... 2024-03-15T13:38:28-00:00 ATel 16525: A new outburst of IGR J06074+2205
https://www.astronomerstelegram.org/?read=16525
Roberto Nesci, Mariateresa Fiocchi, Antonio Vagnozzi Roberto Nesci, Mariateresa Fiocchi, Antonio Vagnozzi roberto.nesci@inaf.it Credentialed by: Roberto Nesci (roberto.nesci@inaf.it) The Astronomer's Telegram ATel16525 IGR J06074+2205 is a B0.5Ve HMXB with a pulsar companion of 374 ms period (Nakajima et al. ATel #16401), discovered by INTEGRAL in 2003 (Chenevez, ATel #223). ... 2024-03-12T22:00:56-00:00 ATel 16523: The radio counterpart of the neutron star X-ray binary Swift J1922.7-1716 detected with MeerKAT
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M. C. Baglio, S. Motta, I. Mariani, R. Fender, T. D. Russell for the X-KAT collaboration M. C. Baglio, S. Motta, I. Mariani, R. Fender, T. D. Russell for the X-KAT collaboration cristina.baglio@inaf.it Credentialed by: Maria Cristina Baglio (cristina.baglio@brera.inaf.it) The Astronomer's Telegram ATel16523 The transient neutron star X-ray binary Swift J1922.7-1716 is currently undergoing a new outburst, as detected by MAXI on 2024 Feb 10 (ATel #16451). The outburst was also confirmed at optical frequencies thanks to the monitoring with the Las Cumbres Observatory (LCO) network of telescopes and the Robotic Eye Mount (REM) telescope (Atel #16461). ... 2024-03-12T14:45:31-00:00 ATel 16512: IGR J06074+2205 ready to outburst again
https://www.astronomerstelegram.org/?read=16512
Roberto Nesci, Mariateresa Fiocchi, Antonio Vagnozzi Roberto Nesci, Mariateresa Fiocchi, Antonio Vagnozzi roberto.nesci@inaf.it Credentialed by: Roberto Nesci (roberto.nesci@inaf.it) The Astronomer's Telegram ATel16512 The HMXB IGR J06074+2205 is a Be star with a pulsar neutron star companion and underwent some X-ray flares in the last 2 years ( ATel #15294, ATel #16267, ATel #16277, ATel #16278, ATel #16307, ATel #16351, ATel #16394, ATel #16401) suggesting a recurrence time scale of about 80 days (Atel #16351). ... 2024-03-07T23:33:36-00:00 ATel 16511: ATCA radio detection of the transient millisecond X-ray pulsar SRGA J144459.2-604207 at the updated X-ray position from Chandra
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T. D. Russell, F. Carotenuto, J. van den Eijnden, E. Kuulkers, C. Sanchez-Fernandez, N. Degenaar, S. Fijma, T. Maccarone, J. C. A. Miller-Jones, A. J. Tetarenko, A. Marino, M. Del Santo, N. Gusinskaia T. D. Russell, F. Carotenuto, J. van den Eijnden, E. Kuulkers, C. Sanchez-Fernandez, N. Degenaar, S. Fijma, T. Maccarone, J. C. A. Miller-Jones, A. J. Tetarenko, A. Marino, M. Del Santo, N. Gusinskaia thomas.russell@inaf.it Credentialed by: Thomas Russell (thomas.russell@inaf.it) The Astronomer's Telegram ATel16511 The new X-ray transient SRGA J144459.2-604207 (Atels #16464, #16469, #16471, #16474, #16510) was observed using the Australia Telescope Compact Array (ATCA) between 2024-02-29 10:40:40 UT and 2024-02-29 19:37:40 UT (MJD 60369.63 +/- 0.19). ... 2024-03-07T21:41:50-00:00 ATel 16510: Chandra localization of the new accreting millisecond X-ray pulsar SRGA J144459.2-604207
https://www.astronomerstelegram.org/?read=16510
G. Illiano, F. Coti Zelati, A. Marino, A. Papitto, A. Miraval Zanon, M. C. Baglio, M. Del Santo, T. D. Russell, F. Ambrosino G. Illiano, F. Coti Zelati, A. Marino, A. Papitto, A. Miraval Zanon, M. C. Baglio, M. Del Santo, T. D. Russell, F. Ambrosino giulia.illiano@inaf.it Credentialed by: Giulia Illiano (giulia.illiano@inaf.it) The Astronomer's Telegram ATel16510 SRGA J144459.2-604207 is a new accreting millisecond X-ray pulsar discovered in outburst on 2024 February 21 by SRG/ART-XC (ATel #16464). Follow-up observations have been carried out in the X-ray band using MAXI (ATel #16469), Swift/XRT (ATel #16471), NICER (ATel #16474, ATel #16480), INTEGRAL (ATels #16485, #16507) and NinjaSat (ATel #16495). ... 2024-03-07T15:00:08-00:00 ATel 16507: C. Sanchez-Fernandez (ESAC/ESA, Spain), E. Kuulkers (ESTEC/ESA, The Netherlands), C. Ferrigno (ISDC, Switzerland), J. Chenevez (DTU, Denmark), M. Del Santo (INAF/IASF, Italy), on behalf of a larger collaboration
https://www.astronomerstelegram.org/?read=16507
C. Sanchez-Fernandez, E. Kuulkers, C. Ferrigno, J. Chenevez, M. Del Santo, on behalf of a larger collaboration C. Sanchez-Fernandez, E. Kuulkers, C. Ferrigno, J. Chenevez, M. Del Santo, on behalf of a larger collaboration celia.sanchez@ext.esa.int Credentialed by: Celia Sanchez-Fernandez (celia.sanchez@sciops.esa.int) The Astronomer's Telegram ATel16507 Following the INTEGRAL detection of quasi-periodic thermonuclear burst activity from the accreting millisecond X-ray pulsar SRGA J144459.2-60420 on (UT) 2024-02-24 09:31:21 - 2024-02-25 02:51:28 (ATel #16485; see also #16464, #16469, #16474, #16480, #16493, #16495) follow-up INTEGRAL observations of the target were conducted in the periods: (UT) 2024-02-26 14:22:37 - 2024-02-27 21:16:05 and (UT) 2024-02-29 09:10:30 - 2024-03-01 11:25:14. ... 2024-03-06T15:56:07-00:00 ATel 16506: The near-infrared counterpart of the newly discovered transient Swift J151857.0-572147
https://www.astronomerstelegram.org/?read=16506
M. C. Baglio, P. D'Avanzo, M. Ferro, S. Campana, S. Covino, D. Fugazza, S. Motta, I. Mariani, M. M. Messa, D. M. Russell, P. Saikia, K. Alabarta, S. Rout M. C. Baglio, P. D'Avanzo, M. Ferro, S. Campana, S. Covino, D. Fugazza, S. Motta, I. Mariani, M. M. Messa, D. M. Russell, P. Saikia, K. Alabarta, S. Rout cristina.baglio@inaf.it Credentialed by: Maria Cristina Baglio (cristina.baglio@brera.inaf.it) The Astronomer's Telegram ATel16506 The newly discovered X-ray transient Swift J151857.0-572147 was first detected by Swift/XRT (ATel#16500). The source was at first thought to be a Gamma Ray Burst (GRB; GCN #35849, #35835) and was then classified as an X-ray transient (ATel #16500). ... 2024-03-05T20:58:55-00:00