Support ATel At Patreon

[ Previous | Next | ADS ]

New RATAN-600 data for Cygnus X-1

ATel #9089; S. A. Trushkin, N. A. Nizhelskij, P. G.Tsybulev, G. V. Zhekanis (SAO RAS, Russia)
on 28 May 2016; 11:31 UT
Credential Certification: Sergei Trushkin (satr@sao.ru)

Subjects: Radio, Optical, X-ray, Black Hole

Referred to by ATel #: 10459

We continued monitoring of Cygnus X-1 at 4.6 GHz with the RATAN-600 radio telescope during last 200 days (see ATel #3546, #7322) from 12 Nov 2015 to 27 May 2016. Usually we have detected Cyg X-1 with typical fluxes 10-20 mJy which are higher the limit of detection ~5 mJy/beam at 4.6 GHz. Sometimes its flux have increased to ~40 mJy (for example at MJD57460). But we have not detected any strong flare during last days as reported by Egron et al. ATel #9087. The measured flux is equal to 22 mJy at MJD57535.037 (27 May 2016). The 4.6 GHz light curve of Cyg X-1 are plotted jointly with ASM Swift/BAT 1d-data at 15-50 keV (http://swift.gsfc.nasa.gov/results/transients/CygX-1.lc.txt).

The light curves at 4.6 GHz (RATAN) and at 15-50 keV (Swift) of Cyg X-1