IGR J17329-2731

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Coordinates: Sky map 17h 32m 50.28s, −27° 30′ 4.9″

IGR J17329-2731
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Ophiuchus
Right ascension 17h 32m 50.28s
Declination −27° 30′ 04.9″
Distance 8800+11000
[1] pc)
Spectral type M III[1][note 1]

IGR J17329-2731[1] as described by European Space Agency astronomers is a single faint transient X-ray source (ATel #10644) observed with Swift/XRT on 16 August 2017 from 2:26 to 2:45 UTC with an effective exposure of time of 1 ks. It was detected within the positional uncertainty provided by INTEGRAL IBIS imagery.[2] It was described as the birth of a symbiotic X-ray binary,[1] a "first" in the lifecycle of an interacting binary star, or a zombie neutron star brought back to life by its neighboring red giant. When first described in 2017, it was seen as an X-ray flare "from an unknown source" in the direction from the galactic (Milky Way) center.[3]

See also


  1. ^ a b c d E. Bozzo; A. Bahramian; C. Ferrigno; A. Sanna; J. Strader; F. Lewis; D. M. Russell; T. di Salvo; L. Burderi; A. Riggio; A. Papitto; P. Gandhi; P. Romano (2018). "IGR J17329-2731: The birth of a symbiotic X-ray binary". Astronomy & Astrophysics. ESO. arXiv:1803.01593. Bibcode:2018A&A...613A..22B. doi:10.1051/0004-6361/201832588.
  2. ^ "IGR J17329-2731: Swift/XRT localization and characterization". The Astronomer's Telegram. 16 August 2017. Bibcode:2017ATel10645....1B.
  3. ^ "Zombie Neutron Star Brought Back To Life By Neighboring Red Giant". International Business Times. 7 March 2018. Retrieved 8 March 2018.


  1. ^ The donor star is described as a "late M giant"
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