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XTE J1550-564, sometimes abbreviated to J1550 and also known as V381 Normae, is a low-mass X-ray binary in the constellation Norma. It is composed of a black hole around 10 times as massive as the Sun,[3] and a star of spectral type K3III. The black hole fires out jets of matter that are thought to arise from an accretion disk, and is hence known as a microquasar.[3]

XTE J1550-564

The visual band light curve of a flare on V381 Normae, adapted from Poutanen et al. (2014)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Norma
Right ascension 15h 50m 58.78s[2]
Declination −56° 28′ 35.0″[2]
Apparent magnitude (V) 16.6
Other designations
V381 Normae[2]
Database references
SIMBADdata

References


  1. Poutanen, Juri; Veledina, Alexandra; Revnivtsev, Mikhail G. (December 2014). "Colours of black holes: infrared flares from the hot accretion disc in XTE J1550–564". Monthly Notices of the Royal Astronomical Society. 445 (4): 3987–3998. doi:10.1093/mnras/stu1989. Retrieved 3 February 2022.
  2. "V* V381 Nor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 August 2015.
  3. Steiner, James F.; Reis, Rubens C.; McClintock, Jeffrey E.; Narayan, Ramesh; Remillard, Ronald A.; Orosz, Jerome A.; Gou, Lijun; Fabian, Andrew C.; Torres, Manuel A. P. (2011). "The spin of the black hole microquasar XTE J1550-564 via the continuum-fitting and Fe-line methods". Monthly Notices of the Royal Astronomical Society. 416 (2): 941–58. arXiv:1010.1013. Bibcode:2011MNRAS.416..941S. doi:10.1111/j.1365-2966.2011.19089.x. S2CID 53399981.


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