Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-19
Adv.SpaceRes.40:1532-1537,2007
Astronomy and Astrophysics
Astrophysics
Paper from poster presentation at COSPAR meeting, Beijing, 2006. in press: Advances in Space Research, Editor: Wynn Ho
Scientific paper
10.1016/j.asr.2007.05.008
The X-ray spectra of Low Mass X-ray Binaries (LMXB) can change on short time-scales, making it difficult to follow their spectral characteristics in detail through model fitting. Colour-colour (C-C) diagrams are therefore often used as alternative, model independent, tools to study the spectral variability of these sources. The INTEGRAL mission, with its high sensitivity, large field of view and good angular resolution, is well suited to study the hard X-ray properties of LMXBs. In particular the ISGRI imager on board of INTEGRAL allows the regular monitoring of the sources in the less frequently studied domain above 20 keV. In this proceeding, C-C diagrams have been made with data from the INTEGRAL public archive; a search is made for systematic differences in the C-C diagrams between black hole candidates (BH) and neutron stars (NS) in LMXBs using a moments analysis method.
Courvoisier Thierry J. -L.
Mowlavi Nami
Paizis Ada
Paltani Stephane
Parmar Arvind
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