| A | B |
|---|---|
Near-infrared (I band) light curves for QZ Vulpeculae, adapted from Chevalier and Ilovaisky (1993).1 The data were collected over a 10 night period in July 1991. Data collected on different nights are plotted with different colors. The shape of the light curve changed over a period of approximately two days, leading to different shapes on even or odd numbered days. | … |
| Observation data Epoch J2000 Equinox ICRS | … |
| Constellation | Vulpecula2 |
| Right ascension | 20 02 49.583 |
| Declination | +25° 14′ 11.3″3 |
| Apparent magnitude (V) | 18.23 |
| Characteristics | … |
| Spectral type | Black hole + K3-6 V4 |
| Astrometry | … |
| Distance | 8800 ± 2300 ly (2700 ± 7005 pc) |
| Orbit | … |
| Period (P) | 8.26 hr3 |
| Details | … |
| Black hole | … |
| Mass | 7.2–7.84 M |
| Other designations | … |
| Nova Vul 1988, INTREF 1007, QZ Vul6 | … |
| Database references | … |
| SIMBAD | data |
GS 2000+25
(echo:: @ ᯤ)
Footnotes
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Chevalier, C.; Ilovaisky, S. A. (March 1993). “Optical studies of transient low-mass X-ray binaries. IV. A 10-hour distorsion wave in the quiescent light curve of GS 2000+25”. Astronomy and Astrophysics. 269: 301–309. Bibcode:1993A&A…269..301C. Retrieved 23 April 2025. ↩
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Roman, Nancy G. (1987). “Identification of a constellation from a position”. Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP…99..695R. doi:10.1086/132034. Constellation record for this object at VizieR. ↩
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Liu, Q. Z; Van Paradijs, J; Van Den Heuvel, E. P. J (2007). “A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition)”. Astronomy & Astrophysics. 469 (2): 807. arXiv:0707.0544. Bibcode:2007A&A…469..807L. doi:10.1051/0004-6361:20077303. S2CID 14673570. ↩ ↩2 ↩3 ↩4
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Yungelson, L; Lasota, J.-P (2008). “Evolution of low-mass binaries with black-hole components”. New Astronomy Reviews. 51 (10–12): 860–868. arXiv:0801.3433. Bibcode:2008NewAR..51..860Y. doi:10.1016/j.newar.2008.03.017. S2CID 11830754. ↩ ↩2
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Reynolds, Mark T; Callanan, Paul J; Robinson, Edward L; Froning, Cynthia S (2008). “Infrared contamination in Galactic X-ray novae”. Monthly Notices of the Royal Astronomical Society. 387 (2): 788. arXiv:0804.0370. Bibcode:2008MNRAS.387..788R. doi:10.1111/j.1365-2966.2008.13272.x. S2CID 16918671. ↩
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“GS 2000+25”. SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 November 2017. ↩