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J/A+A/319/18 X-ray sources <1 degree from Seyfert galaxies (Radecke 1997)
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X-ray sources <1 degree from Seyfert galaxies.
Radecke H.-D.
<Astron. Astrophys. 319, 18 (1997)>
=1997A&A...319...18R (SIMBAD/NED BibCode)
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ADC_Keywords: X-ray sources ; Galaxies, Seyfert
Mission_Name: ROSAT
Keywords: Galaxies: Seyfert - galaxies: spiral - X-rays: galaxies
Abstract:
Archived PSPC observations of 26 Seyfert galaxies have been analyzed
for bright X-ray sources out to the full extent of the field
(< about 50'). Of all Seyferts known this represents a sample 88%
complete to B_T_=10mag, 74% complete to 11mag and 50% complete to
12mag. Using the same reduction algorithm, 14 fields centered on stars
at high galactic latitudes have been used as control fields. Excluding
the two brightest Seyferts, a subset of 24 Seyferts with corrected
apparent magnitude between 8.04<B^o,i^_T_<12.90mag show a minimum
excess of 46 bright X-ray sources generally distributed between 10 and
25' from the target galaxy. The significances of association of these
sources with the Seyferts in the median brightness range are as high
as 7.4-sigma.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 40 Fields analyzed
appena.dat 54 441 Detected Sources with count rates
above 5.0*10^-3^cts/s
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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- 12 A12 --- Field Object name (Seyfert galaxies and reference
stars) used in the analysis
14- 17 F4.1 ks Exp ROSAT PSPC exposure time
19- 21 I3 deg GLAT Galactic latitude of the target object
23- 27 F5.2 mag Bmag ? Brightness of the target object (Apparent
blue magnitude, corrected for galactic and
internal absorption)
29- 32 F4.1 arcmin 1/2D25 ? Semi-apparent major isophotal diameter at
surface brightness level 25.0 B-mag/arcsec^2^
34- 37 A4 --- Class Seyfert classification
39- 47 A9 --- MType Seyfert type
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Byte-by-byte Description of file: appena.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Field Field centered on the object mentioned
14- 15 I2 --- Seq Object number
17- 18 I2 h RAh Right ascension (2000) of the sources detected
20- 21 I2 min RAm Right ascension (2000) of the sources detected
23- 27 F5.2 s RAs Right ascension (2000) of the sources detected
29 A1 --- DE- Declination sign
30- 31 I2 deg DEd Declination (2000) of the sources detected
33- 34 I2 arcmin DEm Declination (2000) of the sources detected
36- 39 F4.1 arcsec DEs Declination (2000) of the sources detected
41- 44 F4.1 arcmin PosOff Offaxis position of the detected sources
46- 51 F6.1 ct/ks CountRate Count rate of the detected sources
53- 54 A2 --- CF [CF] CF for control field
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Acknowledgements: Hans Dieter Radecke <hdr@mpe-garching.mpg.de>
Historical notes:
In table1.dat, GRB 190406 was transformed in GRB 790406 on 21-Nov-1997
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(End) Patricia Bauer [CDS] 06-May-1997