a Cheap Complete Wide Bright Survey

Computer Science

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Chandra Proposal Id #03900446

Scientific paper

We propose to observe with Chandra the 17 sources of the HELLAS (the High Energy LLarge Area Survey from BeppoSAX) for which no obvious optical counterpart was possible to find. With the proposed 57 Ksec of observations we will end up with a total complete sample of 81 sources covering an area 55 deg^2 down ~7x10^-14 cgs. This will result in the largest complete wide field bright hard X-ray survey available so far at these fluxes. The 17 sources are on average harder than the total sample, and probably are either faint type 2 AGNs or the new discovered X-ray emitting "normal" galaxies. This survey will be of great interest to evolutionary studies, allowing a link at brighter fluxes with the faint surveys at moment underway with Chandra.

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