THE 22 MONTH SWIFT-BAT ALL-SKY HARD X-RAY SURVEY

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/186/2/378; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21301285

Tueller, J; Baumgartner, W H; Markwardt, C B; Skinner, G K; Mushotzky, R F; Barthelmy, S; Cummings, J; Gehrels, N; Holland, S ^[1]; Ajello, M ^[2]; Beardmore, A; Evans, P; Godet, O ^[3]; Brandt, W N; Burrows, D; Grupe, D ^[4]; Chincarini, G; Campana, S ^[5]; Cusumano, G ^[6]

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1. NASA/Goddard Space Flight Center, Astrophysics Science Division, Greenbelt, MD 20771 (United States)
2. SLAC National Laboratory and Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States)
3. X-ray and Observational Astronomy Group/Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH (United Kingdom)
4. Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States)
5. Osservatorio Astronomico di Brera(OAB)/Istituto Nazionale di Astrofisica (INAF), 20121 Milan (Italy)
6. IASF-Palermo/Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo/Istituto Nazionale di Astrofisica (INAF), 90146 Palermo (Italy)

We present the catalog of sources detected in the first 22 months of data from the hard X-ray survey (14-195 keV) conducted with the Burst Alert Telescope (BAT) coded mask imager on the Swift satellite. The catalog contains 461 sources detected above the 4.8{sigma} level with BAT. High angular resolution X-ray data for every source from Swift-XRT or archival data have allowed associations to be made with known counterparts in other wavelength bands for over 97% of the detections, including the discovery of {approx}30 galaxies previously unknown as active galactic nuclei and several new Galactic sources. A total of 266 of the sources are associated with Seyfert galaxies (median redshift z {approx} 0.03) or blazars, with the majority of the remaining sources associated with X-ray binaries in our Galaxy. This ongoing survey is the first uniform all-sky hard X-ray survey since HEAO-1 in 1977. Since the publication of the nine-month BAT survey we have increased the number of energy channels from four to eight and have substantially increased the number of sources with accurate average spectra. The BAT 22 month catalog is the product of the most sensitive all-sky survey in the hard X-ray band, with a detection sensitivity (4.8{sigma}) of 2.2 x 10{sup -11} erg cm{sup -2} s{sup -1} (1 mCrab) over most of the sky in the 14-195 keV band.

• OSTI ID: 21301285
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 186, Issue 2; Other Information: DOI: 10.1088/0067-0049/186/2/378; Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CATALOGS
GALAXY NUCLEI
GAMMA RADIATION
HARD X RADIATION
NOVAE
RED SHIFT
SATELLITES
SEYFERT GALAXIES
TELESCOPES