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J/ApJ/681/113       Swift BAT survey of AGNs                 (Tueller+, 2008)

Swift BAT survey of AGNs. Tueller J., Mushotzky R.F., Barthelmy S., Cannizzo J.K., Gehrels N., Markwardt C.B., Skinner G.K., Winter L.M. <Astrophys. J., 681, 113-127 (2008)> =2008ApJ...681..113T
ADC_Keywords: Surveys ; Gamma rays ; X-ray sources ; Active gal. nuclei Keywords: galaxies: active - gamma rays: observations - surveys Abstract: We present the results of the analysis of the first 9 months of data of the Swift BAT (Burst Alert Telescope) survey of AGNs in the 14-195keV band. Using archival X-ray data or follow-up Swift X-ray telescope (XRT) observations, we have identified 129 (103 AGNs) of 130 objects detected at |b|>15° and with significance >4.8σ. One source remains unidentified. These same X-ray data have allowed measurement of the X-ray properties of the objects. Description: The second BAT catalog is based on the first 9 months of BAT data (starting 2005 mid-December) and has several refinements compared to the catalog of the first 3 months of data (Markwardt et al., 2005, Cat. J/ApJ/633/L77). The combination of increased exposure, more uniform sky coverage, and improved software has increased the total number of BAT sources by a factor ∼2.5. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 136 154 Swift Survey Table refs.dat 103 50 References
See also: J/ApJ/633/L77 : SWIFT/BAT detections of AGN (Markwardt+, 2005) J/ApJ/678/102 : BAT X-ray survey. I. (Ajello+, 2008) J/ApJ/673/96 : BAT X-ray Survey. III. (Ajello+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 9 A5 --- --- [SWIFT] 11- 22 A12 --- SWIFT SWIFT designation (JHHMM.m+DDMM) (1) 23 A1 ---- m_SWIFT [ab] Multiplicity index on SWIFT 24 A1 ---- n_SWIFT [l] 3-month survey detection (2) 26- 49 A24 --- OID Identification of counterpart (3) 51- 58 F8.4 deg RAdeg Right ascension in decimal degrees (J2000) (4) 60- 67 F8.4 deg DEdeg Declination in decimal degrees (J2000) (4) 69- 70 A2 --- Flag ">15deg" flag (5) 72- 76 F5.2 --- SNR Signal-to-noise ratio 78- 81 F4.1 10-14W/m2 fBAT BAT fluxes in the 14-195keV band 83- 90 F8.6 --- z ? Redshift 92- 96 F5.2 [10-7W] logL ? Luminosity in the 14-195keV band (6) 98 A1 --- l_logNH Limit flag on lognH 99-103 F5.2 [cm-2] logNH ? Hydrogen column density 105-106 I2 --- r_logNH ? logNH references, in refs.dat file 108 A1 --- Cplx [y] y indicates that the spectrum differs significantly from a simple power law with absorption and an Fe line 110-119 A10 --- Type Optically derived type (7) 120 A1 --- n_Type [+*] Estimated classification (8) 122-123 I2 --- r_Type ? Reference for the type and/or z, where this is not from NED, in refs.dat file 125-129 F5.2 mag Jmag ? 2MASS J magnitude 131-136 F6.3 ct/s fROSAT ? ROSAT flux from the HEASARC database, Schwope et al., 2000, Cat. J/AN/231/1 (9)
Note (1): The Swift name given is based on the source coordinates from the latest analysis of Swift data except that where a name has been previously published it is kept to avoid confusion. Note (2): l = Sources detected in the 3 month survey (Markwardt et al., 2005, Cat. J/ApJ/633/L77) Note (3): The ID name given is that of the entry in the NED database (except in those few cases there is none) Note (4): J2000.0 coordinates for the identified counterpart. Note (5): Flag for sources included in the quantitative analysis: y = source is at |b|>15° y* = source is at |b|>15° and SNR is also >4.8σ Note (6): Distances for luminosity were calculated using the measured redshift and assuming it was due to Hubble flow. Luminosity errors must include the error in measured flux and the error in distance due to the random velocity of galaxies (∼500km/s). Note (7): For well-studied AGNs, the optical type was derived from Veron-Cetty & Veron (2006, Cat. VII/248). For the remaining sources, we determined type by examining the spectrum from archival data or from our own observations. Note (8): Flag as follows: + = few remaining AGNs without an accessible spectrum * = we classify 2MASX J09180027+0425066 as a QSO because its luminosity is greater than 1044.5erg/cm2/s, and as type II because of its very strong narrow OIII lines in SSDS. Note (9): The J band is better to use than the K band because it is expected to have a better sensitivity in detecting local AGNs. The colors of hard X-ray selected AGNs have J/K values ∼1 at low redshifts, and galaxies at low z also have J/K∼1 (Watanabe et al., 2004, Cat. J/ApJ/610/128). The 2MASS survey is more sensitive in J (see, where it is shown that the survey goes ∼1mag more sensitive in J than K).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 21 A18 --- Survey Survey or database 23- 43 A21 --- Aut Author's name 45- 63 A19 --- BibCode BibCode 64-103 A40 --- Com Comments
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Sep-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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