other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2004MNRAS.351...31H - Mon. Not. R. Astron. Soc., 351, 31-56 (2004/June-2)
X-ray source populations in the Galactic plane.
HANDS A.D.P., WARWICK R.S., WATSON M.G. and HELFAND D.J.
Abstract (from CDS):
The combination of the XGPS measurements in the hard X-ray band with the results from earlier surveys carried out by ASCA and Chandra reveals the form of the low-latitude X-ray source counts over 4 decades of flux. It appears that extragalactic sources dominate below ∼10–13 erg/s/cm2 (2-10 keV), with a predominantly Galactic source population present above this flux threshold. The nature of the faint Galactic population observed by XMM-Newton remains uncertain, although cataclysmic variables and RS CVn systems may contribute substantially. XMM-Newton observes an enhanced surface brightness in the Galactic plane in the 2-6 keV band associated with Galactic ridge X-ray emission (GRXE). The integrated contribution of Galactic sources plus the breakthrough of extragalactic signal accounts for up to 20 per cent of the observed surface brightness. The XGPS results are consistent with the picture suggested from a deep Chandra observation in the Galactic plane, namely that the bulk of the GRXE is truly diffuse.
Abstract Copyright: 2004 RAS
Journal keyword(s): surveys - Galaxy: general - X-rays: general
VizieR on-line data: <Available at CDS (J/MNRAS/351/31): tablea1.dat>
Nomenclature: Table A1: XGPS-I JHHMMSS+DDMMSS N=424.
Simbad objects: 426