Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-10-10
Astronomy and Astrophysics
Astrophysics
A&A accepted
Scientific paper
10.1051/0004-6361:200809715
The combination of compact objects, short period variability and peculiar chemical composition of the Ultra Compact X-ray Binaries make up a very interesting laboratory to study accretion processes and thermonuclear burning on the neutron star surface. The improved large optical telescopes and more sensitive X-ray satellites have increased the number of known Ultra Compact X-ray Binaries allowing their study with unprecedented detail. We analyze the average properties common to all ultra compact Bursters observed by INTEGRAL from ~0.2keV to ~150keV. We have performed a systematic analysis of the INTEGRAL public data and Key-Program proprietary observations of a sample of the Ultra Compact X-ray Binaries. In order to study their average properties in a very broad energy band, we combined INTEGRAL with BeppoSAX and SWIFT data whenever possible. For sources not showing any significant flux variations along the INTEGRAL monitoring, we build the average spectrum by combining all available data; in the case of variable fluxes, we use simultaneous INTEGRAL and SWIFT observations when available. Otherwise we compared IBIS and PDS data to check the variability and combine BeppoSAX with INTEGRAL/IBIS data. All spectra are well represented by a two component model consisting of a disk-blackbody and Comptonised emission. The majority of these compact sources spend most of the time in a canonical low/hard state, with dominating Comptonised component and accretion rate lower than ~10^{-9}Msolar/yr, not depending on the used model to fit the data.
Bazzano Angela
Bird Andrew J.
Fiocchi Mariateresa
Natalucci Lorenzo
Sguera Vito
No associations
LandOfFree
The INTEGRAL long monitoring of persistent Ultra Compact X-ray Bursters 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 The INTEGRAL long monitoring of persistent Ultra Compact X-ray Bursters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The INTEGRAL long monitoring of persistent Ultra Compact X-ray Bursters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-527795