ANS observations of Cygnus X-1

Details ANS observations of Cygnus X-1 ANS observations of Cygnus X-1

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..42..175p&link_type=abstract

(COSPAR, Symposium on Fast Transients in X- and Gamma-Rays, Varna, Bulgaria, May 29-31, 1975.) Astrophysics and Space Science, v

Astronomy and Astrophysics

Astronomy

13

Astronomical Netherlands Satellite, Binary Stars, Spaceborne Astronomy, Stellar Luminosity, Stellar Spectra, X Ray Stars, Astronomical Spectroscopy, Light Curve, Photon Density, Radiant Flux Density, Radiation Detectors, Satellite Observation, Spectral Energy Distribution, X Ray Astronomy, X Ray Spectra

Scientific paper

Cygnus X-1 was observed from 3 November until 9 November 1974, using the hard X-ray (1-28 keV) and soft X-ray (1-8 keV) experiment on board the Astronomical Netherlands Satellite. On three occasions, on 4 and 5 November, the X-ray spectrum was observed to be harder, while the flux intensity in the 1-7 keV ranges decreased by about 50% from its quiescent value. These events occurred near and following the time of superior conjunction of the likely optical counterpart HDE 226 868. These events appear to be the same as previously reported absorption dips and reveal this phenomenon to be more complex than had been believed. A systematic study of the X-ray spectral variations in these energy bands, on a time scale of 64 seconds over the period of the spectroscopic binary, is presented.

Affiliated with

Also associated with

No associations

Rating

ANS observations of Cygnus X-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ANS observations of Cygnus X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ANS observations of Cygnus X-1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1781398