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. =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 1.5x10^24^cm^-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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 84 7 Observations and galaxy data table9.dat 52 58 Additional sources -------------------------------------------------------------------------------- See also: B/chandra : The Chandra Archive Log (CXC, 1999-) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- Note (1): Measured from peak Fe emission. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table9.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Note (1): Sources identified as [LHK2006] JHHMMSS.ss+DDMMSS.ss in Simbad. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 16-Jul-2008