Abstract Details
| Name: Nazma Islam Affiliation: Raman Research Institute, Bangalore Conference ID: ASI2015_600 Title : Long term averaged and composite spectrum of X-ray binaries Authors and Co-Authors : Biswajit Paul (Raman Research Institute), Biman B. Nath (Raman Research Institute) et al. Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : X-ray binaries are highly variable and occupy a broad range of spectral states. The energy spectra of X-ray binaries have been investigated during the last few decades with many observatories in different energy bands and with different spectral capabilities. However, these studies are carried out in selected states of X-ray binaries like during outbursts, transitions, quiescent states, and are always done in limited time windows of pointed observations. Wide field monitoring with the all sky monitor MAXI, which also has a broad energy coverage, provided us the first opportunity to investigate the long term average spectra of a large number of X-ray binaries. We will present the long term averaged X-ray spectrum and the composite X-ray spectrum of galactic X-ray binaries spectra with 5 years of MAXI data. The composite X-ray binaries spectra are constructed separately for the for high and low mass X-ray binary population, accounting for circumstellar absorption as well as unabsorbed spectra. These composite X-ray binary spectra will be useful in future studies to obtain realistic estimates on the fractional contribution of hard X-rays in heating of intergalactic medium during the epoch of reionization. |