TY - JOUR
T1 - 2SXPS
T2 - An Improved and Expanded Swift X-Ray Telescope Point-source Catalog
AU - Evans, P. A.
AU - Page, K. L.
AU - Osborne, J. P.
AU - Beardmore, A. P.
AU - Willingale, R.
AU - Burrows, D. N.
AU - Kennea, J. A.
AU - Perri, M.
AU - Perri, M.
AU - Capalbi, M.
AU - Tagliaferri, G.
AU - Cenko, S. B.
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved..
PY - 2020/4
Y1 - 2020/4
N2 - We present the 2SXPS (Swift-XRT Point Source) catalog, containing 206,335 point sources detected by the Swift X-ray Telescope (XRT) in the 0.3-10 keV energy range. This catalog represents a significant improvement over 1SXPS, with double the sky coverage (now 3790 deg2), and several significant developments in source detection and classification. In particular, we present for the first time techniques to model the effect of stray light - significantly reducing the number of spurious sources detected. These techniques will be very important for future, large effective area X-ray missions, such as the forthcoming Athena X-ray observatory. We also present a new model of the XRT point-spread function and a method for correctly localizing and characterizing piled-up sources. We provide light curves - in four energy bands, two hardness ratios, and two binning timescales - for every source, and from these deduce that over 80,000 of the sources in 2SXPS are variable in at least one band or hardness ratio. The catalog data can be queried or downloaded via a web interface at https://www.swift.ac.uk/2SXPS, via HEASARC, or in Vizier (IX/58).
AB - We present the 2SXPS (Swift-XRT Point Source) catalog, containing 206,335 point sources detected by the Swift X-ray Telescope (XRT) in the 0.3-10 keV energy range. This catalog represents a significant improvement over 1SXPS, with double the sky coverage (now 3790 deg2), and several significant developments in source detection and classification. In particular, we present for the first time techniques to model the effect of stray light - significantly reducing the number of spurious sources detected. These techniques will be very important for future, large effective area X-ray missions, such as the forthcoming Athena X-ray observatory. We also present a new model of the XRT point-spread function and a method for correctly localizing and characterizing piled-up sources. We provide light curves - in four energy bands, two hardness ratios, and two binning timescales - for every source, and from these deduce that over 80,000 of the sources in 2SXPS are variable in at least one band or hardness ratio. The catalog data can be queried or downloaded via a web interface at https://www.swift.ac.uk/2SXPS, via HEASARC, or in Vizier (IX/58).
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U2 - 10.3847/1538-4365/ab7db9
DO - 10.3847/1538-4365/ab7db9
M3 - Article
AN - SCOPUS:85087210929
SN - 0067-0049
VL - 247
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
IS - 2
M1 - 54
ER -