Journal
ASTRONOMY & ASTROPHYSICS
Volume 411, Issue 1, Pages L427-L432Publisher
E D P SCIENCES
DOI: 10.1051/0004-6361:20031369
Keywords
X-rays : individuals : IGR J16318-4848; X-rays : binaries; X-rays : diffuse background
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INTEGRAL regularly scans the Galactic plane to search for new objects and in particular for absorbed sources with the bulk of their emission above 10-20 keV. The first new INTEGRAL source was discovered on 2003 January 29, 0.5degrees from the Galactic plane and was further observed in the X-rays with XMM-Newton. This source, IGRJ16318-4848, is intrinsically strongly absorbed by cold matter and displays exceptionally strong fluorescence emission lines. The likely infrared/optical counterpart indicates that IGRJ16318-4848 is probably a High Mass X-Ray Binary neutron star or black hole enshrouded in a Compton thick environment. Strongly absorbed sources, not detected in previous surveys, could contribute significantly to the Galactic hard X-ray background between 10 and 200 keV.
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