J/ApJ/648/111 Chandra sources near AGNs (Levenson+, 2006)
Penetrating the deep cover of Compton-thick active galactic nuclei.
Levenson N.A., Heckman T.M., Krolik J.H., Weaver K.A., Zycki P.T.
<Astrophys. J., 648, 111-127 (2006)>
=2006ApJ...648..111L 2006ApJ...648..111L
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: galaxies: active - galaxies: Seyfert - X-rays: galaxies
Abstract:
We analyze observations obtained with the Chandra X-Ray Observatory of
bright Compton-thick active galactic nuclei (AGNs), those with column
densities in excess of 1.5x1024cm-2 along the lines of sight. We
therefore view the powerful central engines only indirectly, even at
X-ray energies. Using high spatial resolution and considering only
galaxies that do not contain circumnuclear starbursts, we reveal the
variety of emission AGNs alone may produce.
Description:
We observed the galaxies using the Chandra Advanced CCD Imaging
Spectrometer (ACIS) back-illuminated S3 detector. We reprocessed all
data from original Level 1 event files using Chandra Interactive
Analysis of Observations (CIAO) software, version 3.2. (See the
Chandra Science Center for details about Chandra data and standard
processing procedures.)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 7 Observations and galaxy data
table9.dat 52 58 Additional sources
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name
13- 22 A10 "YYYY/MM/DD" Obs.Date Observation Date
24- 28 I5 --- ObsID ? ObsID in Chandra log
30- 34 F5.2 ks ExpTime ? Exposure time
36- 42 E7.2 cm-2 NH Hydrogen column density
44- 49 F6.4 --- z Redshift
51- 55 F5.1 Mpc Dist Distance
57- 59 I3 pc/arcsec Scale Scale
61- 62 I2 h RAh ? Right ascension (J2000) (1)
64- 65 I2 min RAm ? Right ascension (J2000) (1)
67- 71 F5.2 s RAs ? Right ascension (J2000) (1)
73 A1 --- DE- Declination sign (J2000) (1)
74- 75 I2 deg DEd ? Declination (J2000) (1)
77- 78 I2 arcmin DEm ? Declination (J2000) (1)
80- 84 F5.2 arcsec DEs ? Declination (J2000) (1)
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Note (1): Measured from peak Fe emission.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name
13- 14 I2 h RAh Source right ascension (J2000) (1)
16- 17 I2 min RAm Source right ascension (J2000) (1)
19- 23 F5.2 s RAs Source right ascension (J2000) (1)
25 A1 --- DE- Source declination sign (J2000) (1)
26- 27 I2 deg DEd Source declination (J2000) (1)
29- 30 I2 arcmin DEm Source declination (J2000) (1)
32- 36 F5.2 arcsec DEs Source declination (J2000) (1)
38- 41 F4.1 10-4ct/s CR Net count rate
43 I1 10-4ct/s e_CR rms uncertainty on CR
45- 47 I3 arcsec Dist Distance from Galaxy in arcsec
49- 52 F4.1 kpc dr Distance from Galaxy in kpc
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Note (1): Sources identified as [LHK2006] JHHMMSS.ss+DDMMSS.ss in Simbad.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jul-2008