J/ApJ/705/1336 X-ray measurements of ChaMP-SDSS galaxies (Constantin+, 2009)
Probing the balance of AGN and star-forming activity in the local universe with
ChaMP.
Constantin A., Green P., Aldcroft T., Kim D.-W., Haggard D., Barkhouse W.,
Anderson S.F.
<Astrophys. J., 705, 1336-1355 (2009)>
=2009ApJ...705.1336C 2009ApJ...705.1336C
ADC_Keywords: Galaxies, nearby ; X-ray sources ; Active gal. nuclei ; Surveys
Keywords: galaxies: active - galaxies: evolution - galaxies: nuclei -
surveys - X-rays: galaxies
Abstract:
The combination of the Sloan Digital Sky Survey (SDSS) and the Chandra
Multiwavelength Project (ChaMP; Green et al. 2004ApJS..150...43G 2004ApJS..150...43G)
currently offers the largest and most homogeneously selected sample of
nearby galaxies for investigating the relation between X-ray nuclear
emission, nebular line emission, black hole masses, and properties of
the associated stellar populations. We provide X-ray spectral fits and
valid uncertainties for all the galaxies with counts ranging from 2 to
1325 (mean 76, median 19). We present here novel constraints that both
X-ray luminosity LX and X-ray spectral energy distribution bring to
the galaxy evolutionary sequence HII->Seyfert/Transition
Object->LINER->Passive suggested by optical data.
Description:
The cross match of all ChaMP sky regions imaged by Chandra/ACIS with
the SDSS DR4 spectroscopic footprint results in a parent sample of
15955 galaxies on or near a chip and a subset of 199 sources that are
X-ray detected. Among those, only 107 sources have an off-axis angle
(OAA) θ<0.2deg and avoid ccd=8 due to high serial readout noise;
these objects comprise the main sample we employ for this study.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 145 107 X-ray measurements of ChaMP-SDSS galaxies
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/A+A/525/A127 : Properties of X-ray selected AGNs (Tasse+, 2011)
J/ApJ/690/644 : Properties of SDSS QSOs in the ChaMP (Green+, 2009)
J/AJ/135/10 : SDSS-DR4/RASS source matching (Parejko+, 2008)
J/AJ/128/1002 : SDSS candidate type II quasars. II (Zakamska+, 2004)
http://hea-www.harvard.edu/CHAMP/ : ChaMP home page
http://www.mpa-garching.mpg.de/SDSS/ : Catalogues built by the MPA/JHU
collaboration
http://cxc.cfa.harvard.edu/contrib/yaxx/ : YAXX script for Chandra analysis
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- ObjID SDSS ObjID
20- 29 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
31- 39 F9.6 deg DEdeg Declination in decimal degrees (J2000)
41- 45 F5.3 --- z Spectroscopic redshift
47- 51 A5 --- --- [CXOMP]
53- 68 A16 --- CXOMP ChaMP X-ray source ID (JHHMMSS.s+DDMMSS)
70- 73 F4.1 arcmin OAA Chandra off-axis angle
75- 80 F6.1 ct Cts Net 0.5-8keV source counts
82- 86 F5.1 ks Exp Vignetting-corrected exposure time
88 A1 --- Targ [I] I: intended Chandra PI target
90- 93 F4.2 10+20cm-2 NHG Galactic 21cm column
95 A1 --- l_NHi Limit flag on NHi (1)
96-100 F5.2 10+22cm-2 NHi Best-fit YAXX intrinsic column density (2)
102-105 F4.1 10+22cm-2 E_NHi ? Positive 1σ uncertainty in NHi
107-109 F3.1 10+22cm-2 e_NHi ? Negative 1σ uncertainty in NHi
111-114 F4.1 --- Gamma Best-fit YAXX power-law index Γ (2)
116-118 F3.1 --- E_Gamma Positive 1σ uncertainty in Gamma
120-122 F3.1 --- e_Gamma Negative 1σ uncertainty in Gamma
124-130 F7.2 aW/m2 Fx X-ray flux (0.5-8keV) in units of
10-15erg/s/cm2
132-136 F5.2 [10-7W] Lx Log X-ray luminosity (0.5-8keV) in erg/s
138-145 A8 --- Class Optical spectral classification (3)
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Note (1): Upper limits are at 90% confidence level.
Note (2): YAXX (Yet Another X-ray Xtractor) from Aldcroft, 2006HEAD....9.1358A 2006HEAD....9.1358A.
Note that only for objects with >200 counts, NIntr.H, and Γ
values are the result of fitting simultaneously a power law and absorption.
Note (3): Classification as follows:
S = Seyfert
L = LINER (narrow-lined Low Ionization Nuclear Emission Regions)
T = Transition Object (properties border on the definition of a starburst
galaxy and an AGN)
P = Passive galaxy (lacking optical emission line activity)
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 06-Dec-2011