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SDSSS82CXO - Sloan Digital Sky Survey Stripe 82 Chandra Source Match Catalog |
HEASARC Archive |
Overview
This table contains some of the data from the latest release of the Stripe 82 X-ray (82X) survey point-source catalog, which currently covers 31.3 deg2 of the Sloan Digital Sky Survey (SDSS) Stripe 82 Legacy field. In total, 6,181 unique X-ray sources are significantly detected with XMM-Newton (> 5 sigma) and Chandra (> 4.5 sigma). This 31 deg2 catalog release includes data from XMM-Newton cycle AO 13, which approximately doubled the Stripe 82X survey area. The flux limits of the Stripe 82X survey are 8.7 x 10-16 erg s-1 cm-2, 4.7 x 10-15 erg s-1 cm-2, and 2.1 x 10-15 erg s-1 cm^=2^ in the soft (0.5 - 2.0 keV), hard (2 - 10 keV), and full (0.5 - 10 keV) bands, respectively, with approximate half-area survey flux limits of 5.4 x 10-15 erg s-1 cm-2, 2.9 x 10-14 erg s-1 cm-2, and 1.7 x 10-14 erg s-1 cm-2, respectively. The authors matched the X-ray source lists to available multi-wavelength catalogs, including updated matches to the previous release of the Stripe 82X survey; 88% of the sample is matched to a multi-wavelength counterpart. Due to the wide area of Stripe 82X and rich ancillary multi-wavelength data, including coadded SDSS photometry, mid-infrared WISE coverage, near-infrared coverage from UKIDSS and VISTA Hemisphere Survey (VHS), ultraviolet coverage from GALEX, radio coverage from FIRST, and far-infrared coverage from Herschel, as well as existing ~30% optical spectroscopic completeness, this study is beginning to uncover rare objects, such as obscured high-luminosity active galactic nuclei at high redshift. The Stripe 82X point source catalog is a valuable data set for constraining how this population grows and evolves, as well as for studying how they interact with the galaxies in which they live. The authors derive the XMM-Newton number counts distribution and compare it with their previously reported Chandra log N - log S relations and other X-ray surveys.Throughout this study, the authors adopt a cosmology of H0 = 70 km s-1 Mpc-1, OmegaM = 0.27, and Lambda = 0.73.
The XMM-Newton and Chandra X-ray sources were matched with sources in the SDSS, WISE, UKIDSS, VHS, GALEX, FIRST and Herschel databases using the maximum likelihood estimator (MLE) method, as discussed in detail in Section 4 of the reference paper. This table contains the list of 1,146 Chandra sources detected in the SDSS Stripe 82. A related table SDSSS82XMM contains the list of 5,220 XMM-Newton sources detected in the SDSS Stripe 82.
Catalog Bibcode
2016ApJ...817..172LReferences
The 31 Deg2 release of the Stripe 82 X-ray survey: the point source catalog.
LaMassa S.M., Urry C.M., Cappelluti N., Bohringer H., Comastri A.,
Glikman E., Richards G., Ananna T., Brusa M., Cardamone C., Chon G.,
Civano F., Farrah D., Gilfanov M., Green P., Komossa S., Lira P.,
Makler M., Marchesi S., Pecoraro R., Ranalli P., Salvato M., Schawinski K.,
Stern D., Treister E., Viero M.
<Astrophys. J., 817, 172 (2016)>
=2016ApJ...817..172L (SIMBAD/NED BibCode)
Provenance
This table was initially created by the HEASARC in April 2014 based on the machine-readable version of the table ('Properties of SDSS Quasars Detected by Chandra') described in Appendix B1 of the reference paper (LaMassa et al. 2013, MNRAS, 436, 3581) which was obtained from the CDS (their catalog J/MNRAS/436/3581/ file chands82.dat). The present version was created by the HEASARC in January 2017 based on CDS Catalog J/ApJ/817/172 file chandra.dat.Parameters
Source_Number
A unique identification number for each Chandra source in this catalog, the
Chandra Source Catalog 'Master Source Identifier', MSID.
Name
The HEASARC has created a source designation for entries in this catalog
following the standard precepts from the Dictionary of Nomenclature of
Celestial Objects, using the prefix '[LUC2016] CXO' (for LaMassa, Urry,
Cappelluti, 2016 Chandra X-ray Observatory source) and the source number.
ObsID
The Chandra observation identification (ObsID) number for the observation in
which the source was detected.
RA
The Right Ascension of the Chandra source in the selected equinox. This was
given in J2000.0 decimal degrees to a precision of 0.001 degrees (3.6
arcseconds) in the original table.
Dec
The Declination of the Chandra source in the selected equinox. This was given
in J2000.0 decimal degrees to a precision of 0.001 degrees (3.6 arcseconds)
in the original table.
LII
The Galactic Longitude of the Chandra source.
BII
The Galactic Latitude of the Chandra source.
Error_Radius
The positional uncertainty of the Chandra source position, in arcseconds.
CXO_Nn_Offset
The angular distance from this Chandra source to the nearest other Chandra
source, in arcseconds.
XMM_AO10_Flag
This cross-correlation flag parameter is set to 'Y' to indicate that the
Chandra source has a counterpart source in the XMM-Newton archival and AO10
sample in the SDSS Stripe 82 XMM-Newton Catalog (the HEASARC
SDSSS82XMM table). Otherwise, it is
set to 'N'.
XMM_AO10_Source_Number
The record number (rec_no) of the counterpart source in the XMM-Newton
archival and AO10 sample in the SDSS Stripe 82 XMM-Newton Catalog (the
HEASARC SDSSS82XMM table).
XMM_AO13_Flag
This cross-correlation flag parameter is set to 'Y' to indicate that the
Chandra source has a counterpart source in the XMM-Newton AO13 sample of the
SDSS Stripe 82 XMM-Newton Catalog (the HEASARC
SDSSS82XMM table). Otherwise, it is
set to 'N'.
XMM_AO13_Source_Number
The record number (rec_no) of the counterpart source in the XMM-Newton AO13
sample in the SDSS Stripe 82 XMM-Newton Catalog (the HEASARC
SDSSS82XMM table).
Lns_Rem_Flag
This flag parameter is set to 'Y' to indicate that the Chandra source was
removed from the logN - logS relation presented in the reference paper.
Otherwise, it is set to 'N'. The removed objects are targeted sources of
observations, and objects that overlap XMM-Newton observations in the field.
SB_Flux_Lower
The lower bound on the soft-band (0.5-2 keV) flux of the Chandra source, in
erg cm-2 s-1.
SB_Flux
The soft-band (0.5-2 keV) flux of the Chandra source, in erg cm-2 s-1.
The flux is set to null if the source has a significance of < 4.5 sigma in
this band. For the Chandra sources, only significant (>= 4.5 sigma) fluxes
are reported (see the text of the reference paper for details). Fluxes are
converted from count rate assuming a power-law spectrum where the slope Gamma
= 2.0.
SB_Flux_Upper
The upper bound on the soft-band (0.5-2 keV) flux of the Chandra source, in
erg cm-2 s-1.
SB_Counts
The net source counts detected in the soft band (0.5-2 keV).
HB_Flux_Lower
The lower bound on the hard-band (2-7 keV) flux of the Chandra source, in erg
cm-2 s-1.
HB_Flux
The hard-band (2-7 keV) flux of the Chandra source, in erg cm-2 s-1. The
flux is set to null if the source has a significance of < 4.5 sigma in this
band. For the Chandra sources, only significant (>= 4.5 sigma) fluxes are
reported (see the text of the reference paper for details). Fluxes are
converted from count rate assuming a power-law spectrum where the slope Gamma
= 1.7.
HB_Flux_Upper
The higher bound on the hard-band (2-7 keV) flux of the Chandra source, in
erg cm-2 s-1.
HB_Counts
The net source counts detected in the hard band (2-7 keV).
FB_Flux_Lower
The lower bound on the full-band (0.5-7 keV) flux of the Chandra source, in
erg cm-2 s-1.
FB_Flux
The full-band (0.5-7 keV) flux of the Chandra source, in erg cm-2 s-1.
The flux is set to null if the source has a significance of < 4.5 sigma in
this band. For the Chandra sources, only significant (>= 4.5 sigma) fluxes
are reported (see the text of the reference paper for details). Fluxes are
converted from count rate assuming a power-law spectrum where the slope Gamma
= 1.7.
FB_Flux_Upper
The upper bound on the full-band (0.5-7 keV) flux of the Chandra source, in
erg cm-2 s-1.
FB_Counts
The net source counts detected in the full band (0.5-7 keV).
Log_SB_Lx
The logarithm of the observed soft-band (0.5-2 keV) X-ray luminosity of the
source, in erg s-1. This is given if the source was detected in this band
and it redshift is known.
Log_HB_Lx
The logarithm of the observed hard-band (2-7 keV) X-ray luminosity of the
source, in erg s-1. This is given if the source was detected in this band
and it redshift is known.
Log_FB_Lx
The logarithm of the observed full-band (0.5-7 keV) X-ray luminosity of the
source, in erg s-1. This is given if the source was detected in this band
and it redshift is known.
SDSS_Rej_Flag
This flag parameter is set to 'Y' to indicate that a SDSS counterpart was
found which exceeded the reliability threshold, but the photometry was
rejected for failing quality control checks, else is set to 'N'.
SDSS_Object_ID
The SDSS object identification number (ObjID) of the SDSS counterpart to the
Chandra source.
SDSS_RA
The Right Ascension of the SDSS counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
SDSS_Dec
The Declination of the SDSS counterpart to the Chandra source in the selected
equinox. This was given in J2000.0 decimal degrees to a precision of 0.001
degrees (3.6 arcseconds) in the original table.
SDSS_CXO_Rel
The reliability from the Maximum Likelihood Estimate (MLE) of the SDSS source
match to the Chandra source, using the highest of the u, g, r, i, and z
reliability values. The definition of this parameter used for counterpart
selection is discussed in Section 4 of the reference paper.
SDSS_CXO_Offset
The angular distance between the Chandra source and its SDSS counterpart, in
arcseconds.
SDSS_Coadd_Flag
This flag parameter is set to 'Y' if the SDSS counterpart is found from the
Jiang et al. (2014, ApJS, 213, 12) coadded catalog. Otherwise, it is set to
'N' if the SDSS counterpart was identified in the single-epoch DR9 imaging
catalog.
Umag
The u magnitude of the SDSS counterpart to the Chandra source. For the
single-epoch matches, this value represents the SDSS pipeline reported
ModelMag value, while the sources from the coadded SDSS catalog have Mag_Auto
values calculated via SExtractor (Bertin & Arnouts 1996, A&AS, 117, 393) as
reported in the Jiang et al. (2014, ApJS, 213, 12) catalogs.
Umag_Error
The uncertainty in the corresponding magnitude of the SDSS counterpart to the
Chandra source. For the single-epoch matches, this value represents the SDSS
pipeline reported ModelMagErr value, while the sources from the coadded SDSS
catalog have MagErr_Auto values calculated via SExtractor (Bertin & Arnouts
1996, A&AS, 117, 393) as reported in the Jiang et al. (2014, ApJS, 213, 12)
catalogs.
Gmag
The g magnitude of the SDSS counterpart to the Chandra source. For the
single-epoch matches, this value represents the SDSS pipeline reported
ModelMag value, while the sources from the coadded SDSS catalog have Mag_Auto
values calculated via SExtractor (Bertin & Arnouts 1996, A&AS, 117, 393) as
reported in the Jiang et al. (2014, ApJS, 213, 12) catalogs.
Gmag_Error
The uncertainty in the corresponding magnitude of the SDSS counterpart to the
Chandra source. For the single-epoch matches, this value represents the SDSS
pipeline reported ModelMagErr value, while the sources from the coadded SDSS
catalog have MagErr_Auto values calculated via SExtractor (Bertin & Arnouts
1996, A&AS, 117, 393) as reported in the Jiang et al. (2014, ApJS, 213, 12)
catalogs.
Rmag
The r magnitude of the SDSS counterpart to the Chandra source. For the
single-epoch matches, this value represents the SDSS pipeline reported
ModelMag value, while the sources from the coadded SDSS catalog have Mag_Auto
values calculated via SExtractor (Bertin & Arnouts 1996, A&AS, 117, 393) as
reported in the Jiang et al. (2014, ApJS, 213, 12) catalogs.
Rmag_Error
The uncertainty in the corresponding magnitude of the SDSS counterpart to the
Chandra source. For the single-epoch matches, this value represents the SDSS
pipeline reported ModelMagErr value, while the sources from the coadded SDSS
catalog have MagErr_Auto values calculated via SExtractor (Bertin & Arnouts
1996, A&AS, 117, 393) as reported in the Jiang et al. (2014, ApJS, 213, 12)
catalogs.
Imag
The i magnitude of the SDSS counterpart to the Chandra source. For the
single-epoch matches, this value represents the SDSS pipeline reported
ModelMag value, while the sources from the coadded SDSS catalog have Mag_Auto
values calculated via SExtractor (Bertin & Arnouts 1996, A&AS, 117, 393) as
reported in the Jiang et al. (2014, ApJS, 213, 12) catalogs.
Imag_Error
The uncertainty in the corresponding magnitude of the SDSS counterpart to the
Chandra source. For the single-epoch matches, this value represents the SDSS
pipeline reported ModelMagErr value, while the sources from the coadded SDSS
catalog have MagErr_Auto values calculated via SExtractor (Bertin & Arnouts
1996, A&AS, 117, 393) as reported in the Jiang et al. (2014, ApJS, 213, 12)
catalogs.
Zmag
The z magnitude of the SDSS counterpart to the Chandra source. For the
single-epoch matches, this value represents the SDSS pipeline reported
ModelMag value, while the sources from the coadded SDSS catalog have Mag_Auto
values calculated via SExtractor (Bertin & Arnouts 1996, A&AS, 117, 393) as
reported in the Jiang et al. (2014, ApJS, 213, 12) catalogs.
Zmag_Error
The uncertainty in the corresponding magnitude of the SDSS counterpart to the
Chandra source. For the single-epoch matches, this value represents the SDSS
pipeline reported ModelMagErr value, while the sources from the coadded SDSS
catalog have MagErr_Auto values calculated via SExtractor (Bertin & Arnouts
1996, A&AS, 117, 393) as reported in the Jiang et al. (2014, ApJS, 213, 12)
catalogs.
SDSS_Spect_Object_ID
The SDSS spectroscopic object identification number (SpecObjID) of the SDSS
counterpart to the Chandra source.
Spect_Class
The optical spectroscopic class as indicated by the pipeline processing (for
spectra downloaded from existing databases) or determined by the authors
through visual inspection for sources targeted in our follow-up campaigns, if
available. The possible values are:
Value Meaning
QSO broad emission lines in spectra;
GALAXY narrow emission lines and/or absorption lines only;
STAR stellar spectrum.
Redshift
The spectroscopic redshift of the source.
Ref_Redshift
The source of the spectroscopic redshift, coded as follows:
0 = SDSS DR9 (Ahn et al., 2012, ApJS, 203, 21, CDS Cat. V/139)
1 = 2SLAQ (Croom et al., 2009, MNRAS, 392, 19)
2 = WiggleZ (Drinkwater et al., 2010, MNRAS, 401, 1429)
3 = DEEP2 (Newman et al., 2013, ApJS, 208, 5)
4 = SDSS spectrum re-fit/verified by the authors
5 = SDSS DR10 (Ahn et al., 2014, ApJS, 211, 17)
6 = Jiang et al. (2006, AJ, 131, 2788)
7 = WIYN HYDRA follow-up observations from 2012 Dec
8 = PRIMUS (Coil et al., 2011, ApJ, 741, 8)
9 = VLT ISAAC follow-up observations from 2013 Aug
10 = Keck NIRSPEC follow-up observations from 2013 Sep
11 = SDSS DR12 (Alam et al., 2015, ApJS, 219, 12)
12 = WIYN Hydra follow-up observations from 2013 Aug - Sep
13 = WIYN HYDRA follow-up observations from 2014 Jan
14 = WIYN HYDRA follow-up observations from 2014 Jun
15 = WIYN HYDRA follow-up observations from 2014 Jul
16 = WIYN HYDRA follow-up observations from 2014 Sep
17 = WIYN HYDRA follow-up observations from 2015 Jan
18 = Palomar DoubleSpec observations from 2014 Jul
19 = MMT Hectospec (Ross et al., 2012, ApJS, 199, 3)
20 = Palomar DoubleSpec observations from 2014 Dec
22 = 6dF (Jones et al., 2004, MNRAS, 355, 747 and 2009, MNRAS, 399, 683,
CDS Cat. VII/259)
23 = VVDS (Le Fevre et al., 2003, Proc. SPIE 4841, 1670 and
2005, A&A, 439, 845, CDS Cat. III/250; Garilli et al., 2008, A&A,
486, 683; Le Fevre et al., 2013, A&A, A559, 14)
WISE_Name
The J2000.0 position-based source designation (WISE JHHMMSS.ss+DDMMSS.s) of
the WISE counterpart to the Chandra source.
WISE_RA
The Right Ascension of the WISE counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.01 degrees (36 arcseconds) in the original table.
WISE_Dec
The Declination of the WISE counterpart to the Chandra source in the selected
equinox. This was given in J2000.0 decimal degrees to a precision of 0.01
degrees (36 arcseconds) in the original table.
WISE_RA_Error
The positional uncertainty of the WISE counterpart position in Right
Ascension, in arcseconds.
WISE_Dec_Error
The positional uncertainty of the WISE counterpart position in Declination,
in arcseconds.
WISE_CXO_Rel
The reliability from the Maximum Likelihood Estimate (MLE) of the WISE source
match to the Chandra source. The definition of this parameter used for
counterpart selection is discussed in Section 4 of the reference paper.
WISE_CXO_Offset
The angular distance between the Chandra source and its WISE counterpart, in
arcseconds.
W1_Mag
The W1 (3.4 um) magnitude of the WISE counterpart to the Chandra source. The
procedure by which the authors obtained the WISE magnitudes is discussed in
Section 4.3 of the reference paper.
W1_Mag_Error
The uncertainty in the corresponding magnitude of the WISE counterpart to the
Chandra source.
W1_Mag_SNR
The signal-to-noise ratio (SNR) of the WISE counterpart detection in the W1
band. Any WISE magnitudes with SNR < 2 are upper limits.
W2_Mag
The W2 (4.6 um) magnitude of the WISE counterpart to the Chandra source. The
procedure by which the authors obtained the WISE magnitudes is discussed in
Section 4.3 of the reference paper.
W2_Mag_Error
The uncertainty in the corresponding magnitude of the WISE counterpart to the
Chandra source.
W2_Mag_SNR
The signal-to-noise ratio (SNR) of the WISE counterpart detection in the W2
band. Any WISE magnitudes with SNR < 2 are upper limits.
W3_Mag
The W3 (12 um) magnitude of the WISE counterpart to the Chandra source. The
procedure by which the authors obtained the WISE magnitudes is discussed in
Section 4.3 of the reference paper.
W3_Mag_Error
The uncertainty in the corresponding magnitude of the WISE counterpart to the
Chandra source.
W3_Mag_SNR
The signal-to-noise ratio (SNR) of the WISE counterpart detection in the W3
band. Any WISE magnitudes with SNR < 2 are upper limits.
W4_Mag
The W4 (22 um) magnitude of the WISE counterpart to the Chandra source. The
procedure by which the authors obtained the WISE magnitudes is discussed in
Section 4.3 of the reference paper.
W4_Mag_Error
The uncertainty in the corresponding magnitude of the WISE counterpart to the
Chandra source.
W4_Mag_SNR
The signal-to-noise ratio (SNR) of the WISE counterpart detection in the W4
band. Any WISE magnitudes with SNR < 2 are upper limits.
WISE_Ext_Flag
This flag parameter is set to 'Y' to indicate that the WISE counterpart to
the Chandra source is extended, else is set to 'N'.
WISE_Rej_Flag
This flag parameter is set to 'Y' to indicate that the WISE counterpart was
found via MLE matching but was rejected due to failing photometry control
checks in every WISE band, else is set to 'N'.
UKIDSS_ID
The UKIDSS identification number of the infrared counterpart to the Chandra
source.
UKIDSS_RA
The Right Ascension of the UKIDSS counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
UKIDSS_Dec
The Declination of the UKIDSS counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
UKIDSS_CXO_Rel
The reliability from the Maximum Likelihood Estimate (MLE) of the UKIDSS
source match to the Chandra source: the highest of the UKIDSS Y, J, H and K
reliability values. The definition of this parameter used for counterpart
selection is discussed in Section 4 of the reference paper.
UKIDSS_CXO_Offset
The angular distance between the Chandra source and its UKIDSS counterpart,
in arcseconds.
Ymag
The Vega Y magnitude (1.02 um) of the UKIDSS counterpart to the Chandra
source.
Ymag_Error
The uncertainty in the corresponding magnitude of the UKIDSS counterpart to
the Chandra source.
Jmag
The Vega J magnitude of the UKIDSS counterpart to the Chandra source.
Jmag_Error
The uncertainty in the corresponding magnitude of the UKIDSS counterpart to
the Chandra source.
Hmag
The Vega H magnitude of the UKIDSS counterpart to the Chandra source.
Hmag_Error
The uncertainty in the corresponding magnitude of the UKIDSS counterpart to
the Chandra source.
Kmag
The Vega K magnitude of the UKIDSS counterpart to the Chandra source.
Kmag_Error
The uncertainty in the corresponding magnitude of the UKIDSS counterpart to
the Chandra source.
UKIDSS_Rej_Flag
This flag parameter is set to 'Y' to indicate that the UKIDSS counterpart was
found via MLE matching, but was rejected due to failing photometry control
checks, else is set to 'N'.
VHS_ID
The VHS identification number of the infrared counterpart to the Chandra
source.
VHS_RA
The Right Ascension of the VHS counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
VHS_Dec
The Declination of the VHS counterpart to the Chandra source in the selected
equinox. This was given in J2000.0 decimal degrees to a precision of 0.001
degrees (3.6 arcseconds) in the original table.
VHS_CXO_Rel
The reliability from the Maximum Likelihood Estimate (MLE) of the VHS source
match to the Chandra source: the highest of the VHS J, H and K reliability
values. The definition of this parameter used for counterpart selection is
discussed in Section 4 of the reference paper.
VHS_CXO_Offset
The angular distance between the Chandra source and its VHS counterpart, in
arcseconds.
VHS_Jmag
The Vega J magnitude of the VHS counterpart to the Chandra source.
VHS_Jmag_Error
The uncertainty in the corresponding magnitude of the VHS counterpart to the
Chandra source.
VHS_Hmag
The Vega H magnitude of the VHS counterpart to the Chandra source.
VHS_Hmag_Error
The uncertainty in the corresponding magnitude of the VHS counterpart to the
Chandra source.
VHS_Kmag
The Vega K magnitude of the VHS counterpart to the Chandra source.
VHS_Kmag_Error
The uncertainty in the corresponding magnitude of the VHS counterpart to the
Chandra source.
VHS_Rej_Flag
This flag parameter is set to 'Y' to indicate that the VHS counterpart was
found via MLE matching, but was rejected due to failing photometry control
checks, else is set to 'N'.
GALEX_ID
The GALEX object identification number (ObjID) of the GALEX counterpart to
the Chandra source.
GALEX_RA
The Right Ascension of the GALEX counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
GALEX_Dec
The Declination of the GALEX counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
GALEX_NUV_Error_Radius
The positional uncertainty of the GALEX NUV (1771-2831 Angstrom) counterpart
to the Chandra source, in arcseconds.
GALEX_FUV_Error_Radius
The positional uncertainty of the GALEX FUV (1344-1786 Angstrom) counterpart
to the Chandra source, in arcseconds.
GALEX_CXO_Rel
The reliability from the Maximum Likelihood Estimate (MLE) of the GALEX
source match to the Chandra source: the higher of the FUV and NUV reliability
values. The definition of this parameter used for counterpart selection is
discussed in Section 4 of the reference paper..
GALEX_CXO_Offset
The angular distance between the Chandra source and its GALEX counterpart, in
arcseconds.
NUV_Mag
The NUV (1771-2831 Angstrom) AB magnitude of the GALEX counterpart to the
Chandra source.
NUV_Mag_Error
The uncertainty in the corresponding magnitude of the GALEX counterpart to
the Chandra source.
FUV_Mag
The FUV (1344-1786 Angstrom) AB magnitude of the GALEX counterpart to the
Chandra source.
FUV_Mag_Error
The uncertainty in the corresponding magnitude of the GALEX counterpart to
the Chandra source.
FIRST_Name
The name of the FIRST counterpart to the Chandra source, viz., FIRST
JHHMMSS.s+DDMMSS.
FIRST_RA
The Right Ascension of the FIRST counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
FIRST_Dec
The Declination of the FIRST counterpart to the Chandra source in the
selected equinox. This was given in J2000.0 decimal degrees to a precision of
0.001 degrees (3.6 arcseconds) in the original table.
FIRST_CXO_Offset
The angular distance between the Chandra source and its FIRST counterpart, in
arcseconds.
Flux_20_cm
The integrated 1.4-GHz flux density of the FIRST counterpart to the Chandra
source, in mJy.
Flux_20_cm_Error
The uncertainty in the integrated 1.4-GHz flux density of the FIRST
counterpart to the Chandra source, in mJy. This was calculated by multiplying
the integrated flux density by the ratio of the RMS to the peak flux density.
Herschel_RA
The Right Ascension of the Herschel counterpart to the Chandra source in the
selected equinox taken from the HeRS survey (Viero et al. 2014, ApJS, 210,
22). This was given in J2000.0 decimal degrees to a precision of 0.01 degrees
(36 arcseconds) in the original table.
Herschel_Dec
The Declination of the Herschel counterpart to the Chandra source in the
selected equinox taken from the HeRS survey (Viero et al. 2014, ApJS, 210,
22). This was given in J2000.0 decimal degrees to a precision of 0.01 degrees
(36 arcseconds) in the original table.
Herschel_CXO_Offset
The angular distance between the Chandra source and its Herschel counterpart,
in arcseconds.
Flux_250_um
The 250-um flux density of the Herschel counterpart to the Chandra source, in
mJy.
Flux_250_um_Error
The uncertainty in the corresponding flux density of the Herschel counterpart
to the Chandra source, in mJy.
Flux_350_um
The 350-um flux density of the Herschel counterpart to the Chandra source, in
mJy.
Flux_350_um_Error
The uncertainty in the corresponding flux density of the Herschel counterpart
to the Chandra source, in mJy.
Flux_500_um
The 500-um flux density of the Herschel counterpart
to the Chandra source, in mJy.
Flux_500_um_Error
The uncertainty in the corresponding flux density of the Herschel counterpart
to the Chandra source, in mJy.
XMM_AO10_Prom_Match
This parameter contains a flag to indicate that a multi-wavelength
counterpart is promoted into this catalog: the multi-wavelength association
did not meet the MLE reliability threshold when matching to the Chandra
catalog, but did meet this requirement for the same X-ray source in the
XMM-Newton archival and AO10 catalog. The number indicates in which catalog
the promoted match is found, as follows:
Value Meaning
1 SDSS counterpart found but photometry rejected for failing quality
control checks;
2 SDSS;
3 redshift;
4 WISE counterpart found but rejected for failing quality control
checks;
5 WISE
6 UKIDSS
7 VHS
8 GALEX
XMM_AO13_Prom_Match
This parameter contains a flag to indicate that a multi-wavelength
counterpart is promoted into this catalog: the multi-wavelength association
did not meet the MLE reliability threshold when matching to the Chandra
catalog, but did meet this requirement for the same X-ray source in the XMM-
Newton AO13 catalog. The number indicates in which catalog the promoted match
is found, as follows:
Value Meaning
1 SDSS counterpart found but photometry rejected for failing quality
control checks;
2 SDSS;
3 redshift;
4 WISE counterpart found but rejected for failing quality control
checks;
5 WISE
6 UKIDSS
7 VHS
8 GALEX
Ctrpt_Coord_Flag
This parameter contains a flag which is set to 0 if the multi-wavelength
counterpart coordinates are consistent within 2 arcseconds (SDSS, UKIDSS,
VHS, FIRST) or 3 arcseconds (WISE, GALEX, Herschel); otherwise the flag value
is set to 1.
Class
The HEASARC Browse object classification of the source, based on the value of
the spect_class parameter.
Contact Person
Questions regarding the SDSSS82CXO database table can be addressed to the HEASARC Help Desk.Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:34:43 EDT
- HEASARC Director: Dr. Andy Ptak
- NASA Official: Dr. Andy Ptak
- Web Curator: J.D. Myers
- Last Modified: 16-Sep-2024