Black Hole Swift 7 28

Black Hole Swift 7 28
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Производитель рыболовных снастей BlackHole (Блэк Хол)

We present high time resolution optical spectroscopy and imaging of the black hole transient Swift J1357.2−0933 during its 2017 outburst. The light curves show recurrent dips resembling those discovered during the 2011 outburst. The dip properties (e.g. duration and depth) as well as the evolution of their recurrence time are similar to those seen in 2011. Spectra obtained during the dips are characterized by broad and blueshifted absorptions in Balmer and He ii. The absorptions show core… Expand
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We present optical spectroscopy obtained with the GTC, VLT and SALT telescopes during the decline of the 2016-2017 outburst of the black hole candidate GRS 1716-249 (Nova Oph 1993). Our 18-epoch data … Expand
We present 12 epochs of optical spectroscopy taken across the discovery outburst of the black hole (BH) candidate MAXI J1803−298 with the Gran Telescopio Canarias and Very Large Telescope. The source … Expand
The black hole transient MAXI J1820+070 displayed optical P Cyg profiles and other wind-related emission line features during the hard state of its discovery outburst. We present near-infrared (NIR) … Expand
We present the discovery of an optical accretion disk wind in the X-ray transient Swift J1858.6-0814. Our 90-spectrum data set, taken with the 10.4 m Gran Telescopio Canarias telescope over eight … Expand
Monthly Notices of the Royal Astronomical Society

Swift J1858.6-0814 is a transient neutron star X-ray binary discovered in 2018 October. Multiwavelength follow-up observations across the electromagnetic spectrum revealed many interesting … Expand
Monthly Notices of the Royal Astronomical Society

MAXI J1659-152 is a 2.4 h orbital period X-ray dipping transient black hole candidate. We present spectroscopy of its I ≈ 23 quiescent counterpart, where we detect Hα emission with full width half … Expand
Monthly Notices of the Royal Astronomical Society

IGR J17285−2922 is a known X-ray binary with a low peak 2–10 keV X-ray luminosity of ∼ 1036 erg s−1 during outburst. IGR J17285−2922 exhibited two outbursts in 2003 and 2010 and went into outburst … Expand
AT2019wey (SRGA J043520.9+552226, SRGE J043523.3+552234) is a transient first reported by the ATLAS optical survey in 2019 December. It rose to prominence upon detection, three months later, by the … Expand
Monthly Notices of the Royal Astronomical Society

We present the discovery of eclipses in the X-ray light curves of the X-ray binary Swift J1858.6–0814. From these, we find an orbital period of $P=76841.3_{-1.4}^{+1.3}$ s (≈21.3 h) and an eclipse … Expand
Monthly Notices of the Royal Astronomical Society

X-ray signatures of outflowing gas have been detected in several accreting black hole binaries, always in the soft state. A key question raised by these observations is whether these winds might … Expand
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Monthly Notices of the Royal Astronomical Society

We report on observations of black hole Swift J1357.2–0933, a member of the modest population of very faint X-ray transients. This source has previously shown intense dips in the optical light … Expand
Monthly Notices of the Royal Astronomical Society
We present an optical spectroscopic study of the black hole X-ray transient V4641 Sgr (=SAX J1819.3-2525) covering the 1999, 2002 and 2004 outbursts. The spectra were taken over 22 different epochs … Expand
We present time-resolved optical spectroscopy of the counterpart to the highinclination black hole low-mass X-ray binary Swift J1357.2-0933 in quiescence. Absorption features from the mass donor star … Expand
Swift J1357.2-0933 is one of the shortest orbital period black hole X-ray transients (BHTs). It exhibited deep optical dips together with an extremely broad H$\alpha$ line during outburst. We present … Expand
We present high time-resolution optical and infrared observations of the edge-on black hole X-ray transient Swift J1357.2-0933. Our data taken in 2012 shows the system to be at its pre-outburst … Expand
We report our multiwavelength study of the 2011 outburst evolution of the newly discovered black hole candidate X-ray binary Swift J1357.2−0933. We analysed the Swift X-ray Telescope and … Expand
We report on a detailed optical spectroscopic follow-up of the black hole (BH) transient MAXI J1820+070 (ASASSN-18ey). The observations cover the main part of the X-ray binary outburst, when the … Expand
Monthly Notices of the Royal Astronomical Society

We present rapid, multiwavelength photometry of the low-mass X-ray binary Swift J1357.2-0933 during its 2017 outburst. Using several sets of quasi-simultaneous ULTRACAM/NTT (optical), NuSTAR … Expand
Monthly Notices of the Royal Astronomical Society
MAXI J1807+132 is an X-ray transient discovered during the decay of an outburst in 2017. We present optical and X-ray monitoring of the source over more than 125 days, from outburst to quiescence. … Expand
We report on optical spectroscopic observations of the X-ray transient XTE J1118+480 covering the period from 2000 April 7 to July 4. The spectrum is characterized by weak, broad, double-peaked … Expand
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From Wikipedia, the free encyclopedia
Binary star in the constellation Sagittarius
A visual band light curve for V4641 Sagittarii, adapted from Goranskij (2001) [1]
V4641 Sgr , GSC 06848-03786 , 2MASS J18192163-2524258 [5]

^ Goranskij, V. P. (May 2001). "The Orbital V-band Light Curve of V4641 Sagittarii" . Information Bulletin on Variable Stars . 5068 . Retrieved 13 March 2022 .

^ Jump up to: a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). " Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics . 616 . A1. arXiv : 1804.09365 . Bibcode : 2018A&A...616A...1G . doi : 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR .

^ Jump up to: a b "V4641 Sgr]]" . International Variable Star Index . Retrieved 2021-03-17 .

^ Jump up to: a b c d e MacDonald, Rachel K. D.; et al. (March 2014). "The Black Hole Binary V4641 Sagitarii: Activity in Quiescence and Improved Mass Determinations". The Astrophysical Journal . 784 (1): 19. arXiv : 1401.4190 . Bibcode : 2014ApJ...784....2M . doi : 10.1088/0004-637X/784/1/2 . 2.

^ "V4641 Sgr" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-03-16 .

^ "Dramatic Outburst Reveals Nearest Black Hole" . National Radio Astronomy Observatory . January 14, 2000 . Retrieved 2008-08-30 .

^ Jump up to: a b Orosz, J. A.; et al. (July 2001). "A Black Hole in the Superluminal Source SAX J1819.3-2525 (V4641 SGR)". The Astrophysical Journal . 555 (1): 489–503. arXiv : astro-ph/0103045 . Bibcode : 2001ApJ...555..489O . doi : 10.1086/321442 . Finally, we find a distance in the range 7.40 ≤ d ≤ 12.31 kpc (90% confidence), which is at least a factor of ≈ 15 larger than the initially assumed distance of ≈ 1,600 light-years/500 pc.

V4641 Sagittarii is a variable X-ray binary star system in the constellation Sagittarius . It is the source of one of the fastest superluminal jets in the Milky Way galaxy.

In 1999 a violent X-ray outburst revealed it to contain a black hole . [6] At the time, it was considered to be the closest known black hole to Earth, at a distance of approximately 1,600 light-years (490 pc ). Later observations showed it to be much farther away, reported in 2001 to be between 7.4 and 12.31 kpc , [7] 6.2 kpc in 2014, [4] and around 6.6 kpc according to its Gaia Data Release 2 parallax. [2]

The star in the binary system is a late B class giant with a mass about three times that of the Sun . It orbits a black hole about twice as massive every 2.8 days. The star is distorted, which causes variations in its brightness as it orbits and rotates. It is also slightly eclipsed by an accretion disc around the black hole. The system usually does not produce a significant amount of x-rays, but undergoes outbursts when the x-ray luminosity increases due to accretion onto the black hole driving superluminal jets. [7]

RA: −0.734 [2] mas / yr Dec.: +0.418 [2] mas / yr

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Black Hole Swift 7 28

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