Historical light curve of the black hole binary V4641 Sgr based on the Moscow and Sonneberg plate archives

2014/10/08 by E. A. Barsukova, Barsukova, E. A., V. P. Goranskij +3
Engineering · Physics and Astronomy · #Astrophysical Phenomena and Observations #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Mechanics and Biomechanics Studies

paper · pdf · doi:10.48550/arxiv.1410.2055

openalex publication_date 2014/10/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We performed digital processing of a large set of photographic plates for X-ray binary system V4641 Sgr containing a black hole. A total of 277 plates were found in archives dated between 1960 and 1992. Photographic observations revealed lower level of outburst activity if to compare with CCD data after the large 1999 outburst. Only single outburst which happened in 1978 was confirmed. If archive photographic data are used along with contemporary CCD observations, the orbital period may be improved, and its value is 2.81728 +/-0.00004 day.

Related

• Rapid Spectral Variability during the 2003 Outburst of V4641 Sgr (= SAX J1819.3-2525)
• Recent changes in a flickering variability of the black hole X-ray transient V616 Mon = A0620-00
• XRISM reveals a variable, multi-phase outflow-inflow structure during the X-ray obscured 2024 outburst of the black hole transient V4641 Sgr
• Rarefied Gaseous Disk Around Black Hole in the System of V4641 Sgr
• An Illustrated History of Black Hole Imaging : Personal Recollections (1972-2002)