J/ApJ/633/L77 SWIFT/BAT detections of AGN (Markwardt+, 2005)
The Swift/BAT high-latitude survey: first results.
Markwardt C.B., Tueller J., Skinner G.K., Gehrels N., Barthelmy S.D.,
Mushotzky R.F.
<Astrophys. J., 633, L77-L80 (2005)>
=2005ApJ...633L..77M 2005ApJ...633L..77M
ADC_Keywords: Active gal. nuclei ; Gamma rays ; Surveys
Keywords: galaxies: active - gamma rays: observations - surveys
Abstract:
We present preliminary results from the first 3 months of the Swift
Burst Alert Telescope (BAT) high Galactic latitude survey in the
14-195keV band. The survey reaches a flux of ∼10-11erg/cm2/s and
has ∼2.7' (90% confidence) positional uncertainties for the faintest
sources. This represents the most sensitive survey to date in this
energy band. These data confirm the conjectures that a
high-energy-selected active galactic nucleus (AGN) sample would have
very different properties from those selected in other bands and that
it represents a "true" sample of the AGN population. We have
identified 86% of the 66 high-latitude sources. Twelve are
Galactic-type sources, and 44 can be identified with previously known
AGNs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 78 44 BAT detections of AGN
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See also:
VII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- SWIFT SWIFT name
14- 20 F7.3 deg RAdeg Right Ascension in decimal degrees (J2000)
22- 28 F7.3 deg DEdeg Declination in decimal degrees (J2000)
30- 32 F3.1 arcmin ePos The 99% confidence position error radius
34- 50 A17 --- ID Source identification
52- 54 F3.1 arcmin Off Source identification offset
56- 61 F6.4 --- z Source redshift
63- 66 F4.1 [cm-2] logNH ? Log of the hydrogen column density
68 I1 --- r_logNH ? Reference for logNH (1)
70- 73 F4.1 [mW/m2] logLX BAT 14-195keV luminosity (2)
75 A1 --- RL [YN] Radio Loud?
77- 78 A2 --- Type Source type: Sy=Seyfert, Bl=Blazar
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Note (1): Reference for logNH, defined as follows:
1 = Turner et al. (2001, in AIP Conf. Proc. 599, X-Ray Astronomy: Stellar
Endpoints, AGN, and the Diffuse X-Ray Background, ed. N. E. White,
G. Malaguti, and G. G. C. Palumbo (Melville: AIP), 991);
2 = Lutz et al. (2004, Cat. J/A+A/418/465);
3 = This work (XMM-Newton);
4 = Gilli et al. (2000A&A...355..485G 2000A&A...355..485G);
5 = This work (ASCA);
6 = Gondoin et al. (2003A&A...397..883G 2003A&A...397..883G);
7 = Vignali & Comastri(2002A&A...381..834V 2002A&A...381..834V);
8 = Perlman et al. (2005ApJ...625..727P 2005ApJ...625..727P);
9 = This work (Chandra).
Note (2): In units of erg/s/cm2. Estimated systematic error: +20%, -50%.
Assumes a WMAP cosmology (H0=71km/s/Mpc; Spergel et al.
2003ApJS..148..175S 2003ApJS..148..175S).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 21-Jul-2006