Chandra Observations of Optically Faint Sources Discovered with ASCA

Details Chandra Observations of Optically Faint Sources Discovered with ASCA Chandra Observations of Optically Faint Sources Discovered with ASCA

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop.1031u&link_type=abstract

Chandra Proposal ID #03900836

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #03900836

Scientific paper

The origin of the Cosmic X-ray background (CXB) has been one of the key issues of X-ray astronomy. We propose Chandra observations of 5 selected unidentified X-ray sources with fluxes larger than 3 x 10^(-13) erg/cm2/s discovered by the serendipitous source survey project with ASCA. They do not have any optical counterparts with the R band magnitude brighter than 19.5 and could be a luminous class of type-2 QSOs. For the determination of the nature of the 2-10 keV source population excellent X-ray positions are absolutely vital to obtain reliable identifications, in particular if one does not know a priori the nature of the optical objects.

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