NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
1SXPS: A Deep Swift X-Ray Telescope Point Source Catalog with Light Curves and SpectraWe present the 1SXPS (Swift-XRT point source) catalog of 151,524 X-ray point sources detected by the Swift-XRT in 8 yr of operation. The catalog covers 1905 sq deg distributed approximately uniformly on the sky. We analyze the data in two ways. First we consider all observations individually, for which we have a typical sensitivity of approximately 3 × 10(exp −13) erg cm(exp −2) s(exp −1) (0.3-10 keV). Then we co-add all data covering the same location on the sky: these images have a typical sensitivity of approximately 9 × 10(exp −14) erg cm(exp −2) s(exp −1) (0.3-10 keV). Our sky coverage is nearly 2.5 times that of 3XMM-DR4, although the catalog is a factor of approximately 1.5 less sensitive. The median position error is 5.5 (90% confidence), including systematics. Our source detection method improves on that used in previous X-ray Telescope (XRT) catalogs and we report greater than 68,000 new X-ray sources. The goals and observing strategy of the Swift satellite allow us to probe source variability on multiple timescales, and we find approximately 30,000 variable objects in our catalog. For every source we give positions, fluxes, time series (in four energy bands and two hardness ratios), estimates of the spectral properties, spectra and spectral fits for the brightest sources, and variability probabilities in multiple energy bands and timescales.
Document ID
20150008361
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Evans, P. A.
(Leicester Univ. United Kingdom)
Osborne, J. P.
(Leicester Univ. United Kingdom)
Beardmore, A. P.
(Leicester Univ. United Kingdom)
Page, K. L.
(Leicester Univ. United Kingdom)
Willingale, R.
(Leicester Univ. United Kingdom)
Mountford, C. J.
(Leicester Univ. United Kingdom)
Pagani, C.
(Leicester Univ. United Kingdom)
Burrows, D. N.
(Pennsylvania State Univ. University Park, PA, United States)
Kennea, J. A.
(Pennsylvania State Univ. University Park, PA, United States)
Perri, M.
(Italian Space Agency Rome, Italy)
Tagliaferri, G.
(Osservatorio Astronomico di Brera Merate, Italy)
Gehrels, N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
May 19, 2015
Publication Date
December 12, 2013
Publication Information
Publication: The Astrophysical Journal
Publisher: IOP Publishing
Volume: 210
Issue: 1
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN21594
GSFC-E-DAA-TN21510
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
telescope
catalog
curves
No Preview Available