Physics – Optics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4805m&link_type=abstract
American Astronomical Society, HEAD meeting #11, #48.05; Bulletin of the American Astronomical Society, Vol. 41, p.740
Physics
Optics
Scientific paper
Sensitive surveys of the X-ray universe have been limited to small areas of the sky due to the intrinsically small field of view of Wolter-I X-ray optics, whose angular resolution degrades with the square of the off axis angle. High angular resolution is needed to achieve a low background per source, minimize source confusion, and distinguish point from extended objects. WFXT consists of three co-aligned wide field X-ray telescopes with a 1° field of view and a 5000 cm2. WFXT will perform three extragalactic surveys that will cover most of the sky to 100--1000 times the sensitivity of the ROSAT All Sky Survey, > 2000 deg2 to deep Chandra or XMM-Newton sensitivity, and > 100 deg2 to the deepest Chandra sensitivity. WFXT will generate a legacy X-ray dataset of >/ 5×105 clusters and groups of glaxies to z 2, also characterizing the physics of the intracluster gas for a significant fraction of them, thus providing an unprecedented data set for cosmological applications; it will detect >107 AGN to z>6, again obtaining spectra for a substantial fraction; it will detect >105 normal/starburst galaxies; and it will detect and characterize star formation regions across the Galaxy. WFXT is the only X-ray survey mission that will match, in area and sensitivity, the next
generation of wide-area optical, IR and radio surveys.
Murray Stephen S.
WFXT Team
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