A4 Refereed article in a conference publication
Spectral evolution of the galactic microquasars XTEJ1550-564 and GROJ1655-40 during outbursts
Authors: Lutovinov A., Tsygankov S., Arefiev V., Revnivtsev M.
Editors: Romero GE, Sunyaev RA, Belloni TM
Conference name: Symposium of the International-Astronomical-Union on Jets at All Scales
Publication year: 2010
Journal: Proceedings of the International Astronomical Union
Book title : Jets at All Scales
Journal name in source: Proceedings of the International Astronomical Union
Volume: 6
Issue: 275
First page : 321
Last page: 322
Number of pages: 2
ISBN: 978-0-52176-607-4
ISSN: 1743-9213
DOI: https://doi.org/10.1017/S1743921310016303
Abstract
We present results of a broadband spectroscopy of the galactic microquasars and black hole candidates XTE J1550-564 and GROJ1655-40, performed with the INTEGRAL and RXTE observatories during strong outbursts in 2003 and 2005, respectively. The spectral parameters evolution was traced during brightening and fading phases of each outburst to search a possible hysteresis and transitions from state to state. We estimated a size and optical depth of different regions around XTE J1550-564, like a hot plasma zone and optically thick accretion disk. Upper limits to the annihilation 511 keV line emission were obtained for both sources using data of the SPI spectrometer onboard the INTEGRAL observatory. © International Astronomical Union 2011.
We present results of a broadband spectroscopy of the galactic microquasars and black hole candidates XTE J1550-564 and GROJ1655-40, performed with the INTEGRAL and RXTE observatories during strong outbursts in 2003 and 2005, respectively. The spectral parameters evolution was traced during brightening and fading phases of each outburst to search a possible hysteresis and transitions from state to state. We estimated a size and optical depth of different regions around XTE J1550-564, like a hot plasma zone and optically thick accretion disk. Upper limits to the annihilation 511 keV line emission were obtained for both sources using data of the SPI spectrometer onboard the INTEGRAL observatory. © International Astronomical Union 2011.
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