J/ApJ/673/96 BAT X-ray Survey - III (Ajello+, 2008)
BAT X-ray Survey - III: X-ray Spectra and Statistical Properties.
Ajello M., Rau A., Greiner J., Kanbach G., Salvato M., Strong A.W.,
Barthelmy S.D., Gehrels N., Markwardt C.B., Tueller J.
<Astrophys. J., 673, 96-113 (2008)>
=2008ApJ...673...96A 2008ApJ...673...96A
ADC_Keywords: X-ray sources
Mission_Name: Swift
Keywords: galaxies: active - surveys - X-rays: binaries - X-rays: galaxies
Abstract:
In this concluding part of the series of three papers dedicated to
the Swift BAT hard X-ray survey (BXS), we focus on the X-ray spectral
analysis and statistical properties of the source sample. Using a
dedicated method to extract time-averaged spectra of BAT sources, we
show that Galactic sources have, generally, softer spectra than
extragalactic objects and that Seyfert 2 galaxies are harder than
Seyfert 1's.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 127 45 Spectral parameters
table1.tex 149 290 LaTeX version of table1
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name Source name
21- 28 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
30- 37 F8.4 deg DEdeg Declination in decimal degrees (J2000)
39- 44 A6 --- Type Source class
46- 50 F5.2 --- Gamma ?=- Photon index (1)
52- 56 F5.3 --- E_Gamma ?=- Positive error on photon index
58- 62 F5.3 --- e_Gamma ?=- Negative error on photon index
64- 68 F5.2 keV K ?=- Plasma temperature
from bremmstrahlung fit (1)
70- 75 F6.3 keV E_K ?=- Positive error on temperature
77- 82 F6.3 keV e_K ?=- Negative error on temperature
84 A1 --- l_Nh Limit flag on Nh
85- 89 F5.2 10+22cm-2 Nh ?=- Source intrinsic absorption
(in Hydrogen atoms/cm2)
90 A1 --- n_Nh [acef] Note on Nh (2)
92- 96 F5.3 10+22cm-2 E_Nh ?=- Positive error on absorption
98-102 F5.3 10+22cm-2 e_Nh ?=- Negative error on absorption
104-121 A18 --- Model Model used for spectral fitting
(names come from Xspec)
123-127 A5 --- Inst Instruments used for data analysis (3)
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Note (1): Photon index and/or plasma temperature for the model, specified
in column "Model", to fit the data
Note (2): Notes as follows:
a = From Gallo et al. (2006MNRAS.365..688G 2006MNRAS.365..688G)
c = Lower limit on absorption estimated through the non detection
by ROSAT
e = Order of magnitude of the absorption estimated imposing that
the extrapolated source flux match the ROSAT-PSPC count rates
f = UGC 4203 exhibits transition between reflection-dominated and a
transmission-dominated spectrum. The absorption is estimated
in the latter case using XRT data (see text for details).
Note (3): Instruments as follows:
B = Swift/BAT
X = Swift/XRT
A = ASCA
S = BeppoSAX
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Acknowledgements:
Marco Ajello, majello(at)mpe.mpg.de
(End) Patricia Vannier [CDS] 10-Dec-2007