a Deep Observation of the Galactic Bulge

Physics

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Galaxies, Galactic Surveys, W0.2-2.1, Xmm-Newton Proposal 04022801

Scientific paper

We propose to take advantage of the low interstellar absorption in the W0.2-2.1 window (l=0.2, b=-2.1, NH ~ 4e21 cm-2) to carry out a deep survey of the central parts of the Galaxy. We will detect faint X-ray bulge sources with Lx above 3e31 erg/s (0.5-2 keV) and will probe the galactic disk population over the first ~ 4 kpc. This window which is the closest known to the galactic center offers unique prospects for follow-up studies at large distances. Among expected bulge sources are cataclysmic variables, X-ray transients in quiescence and progenitors of bright low mass X-ray binaries. Our AO3 XMM-Newton observations allowed us to only reach the brightest part of these X-ray sources. First results of a dedicated follow-up with the VLT/VIMOS confirm the nature of the expected population.

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