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INTEGRAL discovery of a bright highly obscured galactic X-ray binary source IGR J16318-4848

R. Walter·J. Rodriguez·L. Foschini·J. de Plaa·S. Corbel·T. J. -L. Courvoisier·P. R. den Hartog·F. Lebrun·A. N. Parmar·J. A. Tomsick·P. Ubertini
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Abstract

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, 0.5 degree from the Galactic plane and was further observed in the X-rays with XMM-Newton. This source, IGR J16318-4848, is intrinsically strongly absorbed by cold matter and displays exceptionally strong fluorescence emission lines. The likely infrared/optical counterpart indicates that IGR J16318-4848 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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R. Walter, J. Rodriguez, L. Foschini, J. de Plaa, S. Corbel, T. J. -L. Courvoisier, P. R. den Hartog, F. Lebrun, A. N. Parmar, J. A. Tomsick, P. Ubertini. 2003-09-19. INTEGRAL discovery of a bright highly obscured galactic X-ray binary source IGR J16318-4848. https://doi.org/10.1051/0004-6361%3A20031369

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