ROSAT's view of the X-ray sky
نویسندگان
چکیده
منابع مشابه
The colour of the Deep ROSAT X-ray sky fluctuations
We have carried out a fluctuation analysis in four bands (R4, R5, R6 and R7 corresponding to 0.44-1.01 keV, 0.56-1.21 keV, 0.73-1.56 keV and to 1.05-2.04 keV respectively) of two very deep ROSAT PSPC observations in directions where the galactic HI column is minimal. This has enabled us to study the average spectrum of the sources contributing to 0.5-2 keV fluxes ∼ 10erg cm s . The best fit spe...
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Most of the baryons in the present-day universe are thought to reside in intergalactic space at temperatures of 10 K. X-ray emission from these baryons contributes a modest (∼10%) fraction of the ∼ 1 keV background whose prominence within the large-scale cosmic web depends on the amount of nongravitational energy injected into intergalactic space by supernovae and AGNs. Here we show that the vi...
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We have been monitoring M31 with HRC and ACIS onboard Chandra regularly in the past two years. By combining eight Chandra ACIS-I observations taken between 1999 to 2001, we have identified 204 X-ray sources within the central ∼ 17 ′ ×17 ′ region of M31, with a detection limit of ∼ 1.6 × 10 35 erg s −1. Of these 204 sources, 21 are identified with globular clusters, 2 with supernova remnants (on...
متن کاملImaging Large Scale Structure in the X-ray Sky
We present the first results from a wide solid angle, moderately deep Chandra survey of the Lockman Hole North-West region. Our 9 ACIS-I fields cover an effective solid angle of 0.4 deg and reach a depth of 3× 10−16 erg cm−2 s−1 in the 0.4–2 keV band and 3× 10−15 erg cm−2 s−1 in the 2–8 keV band. The best fit logN-logS for the entire field, the largest contiguous Chandra field yet observed, mat...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200912206