AEGISXDCXO - AEGIS-X Deep Survey Chandra X-Ray Point Source Catalog

Overview

This table is based on the results of deep Chandra imaging of the central region of the Extended Groth Strip, the AEGIS-X Deep (AEGIS-XD) survey. When combined with previous Chandra observations of a wider area of the strip, AEGIS-X Wide (AEGIS-XW), these provide data to a nominal exposure depth of 800ks in the three central ACIS-I fields, a region of approximately 0.29 deg². This is currently the third deepest X-ray survey in existence; a factor ~2-3 shallower than the Chandra Deep Fields (CDFs), but over an area ~3 times greater than each CDF. This table contains a catalog of 937 point sources detected in the deep Chandra observations, along with identifications of the X-ray sources from deep ground-based, Spitzer, GALEX, and Hubble Space Telescope imaging. Using a likelihood ratio analysis, the authors associate multiband counterparts for 929/937 of their X-ray sources, with an estimated 95% reliability,making the identification completeness approximately 94% in a statistical sense. Reliable spectroscopic redshifts for 353 of the X-ray sources are available predominantly from Keck (DEEP2/3) and MMT Hectospec, so the current spectroscopic completeness is ~38%. For the remainder of the X-ray sources, the authors compute photometric redshifts based on multiband photometry in up to 35 bands from the UV to mid-IR. Particular attention is given to the fact that the vast majority of the X-ray sources are active galactic nuclei and require hybrid templates. The photometric redshifts have a mean accuracy sigma = 0.04 and an outlier fraction of approximately 5%, reaching sigma = 0.03 with less than 4% outliers in the area covered by CANDELS.

The new AEGIS-XD Chandra data were taken at three nominal pointing positions, which the authors have designated AEGIS-1, AEGIS-2, and AEGIS-3. These observations were all taken in the time period 2007 December 11 to 2009 June 26 using the ACIS-I instrument. The centers of the 3 AEGIS fields correspond fairly closely to those of the EGS-3, EGS-4, and EGS-5 fields of Laird et al. (2009, ApJS, 180, 102).

The Rainbow Cosmological Surveys Database (http://rainbowx.fis.ucm.es/Rainbow_Database/Home.html; see Section 4 of the reference paper for more details) contains many multiwavelength photometric datasets giving information on optical and infrared sources in these fields. The characteristics of these datasets are given in Table 7 of the reference paper.

Catalog Bibcode

2015ApJS..220...10N

References

AEGIS-X: deep Chandra imaging of the central Groth Strip.
    Nandra K., Laird E.S., Aird J.A., Salvato M., Georgakakis A., Barro G.,
    Perez-Gonzalez P.G., Barmby P., Chary R.-R., Coil A., Cooper M.C.,
    Davis M., Dickinson M., Faber S.M., Fazio G.G., Guhathakurta P., Gwyn S.,
    Hsu L.-T., Huang J.-S., Ivison R.J., Koo D.C., Newman J.A., Rangel C.,
    Yamada T., Willmer C.
   <Astrophys. J. Suppl. Ser., 220, 10 (2015)>
   =2015ApJS..220...10N    (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in February 2016 based on the CDS catalog J/ApJS/220/10 files table11.dat, table12.dat, table13.dat, table14.dat and table15.dat.

Parameters

Source_Number
A unique master source identification number for each source in this catalog.

Name
The J2000.0 position-based IAU-Style Chandra X-ray source designation, viz., 'AEGISXD JHHMMSS.ss+DDMMSS.s', where the prefix stands for 'All-wavelength Extended Groth strip International Survey X-ray-Deep'.

RA
The Right Ascension of the X-ray source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees (0.0036 arcseconds) in the original table.

Dec
The Declination of the X-ray source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees (0.0036 arcseconds) in the original table.

LII
The Galactic Longitude of the X-ray source.

BII
The Galactic Latitude of the X-ray source.

Error_Radius
The positional error of the X-ray source, in arcseconds.

Off_Axis
The off-axis angle of the X-ray source, in arcminutes.

FB_Counts
The total (i.e., not background-subtracted) counts of the X-ray source in the full energy band (0.5 - 7 keV), extracted at the source position from within the 90% encircled energy fraction (EEF).

FB_Bck_Counts
The estimated background counts in the full energy band (0.5 - 7 keV) at the position of the X-ray source, scaled to the area that corresponds to the 90% encircled energy fraction (EEF).

SB_Counts
The total (i.e., not background-subtracted) counts of the X-ray source in the soft energy band (0.5 - 2 keV), extracted at the source position from within the 90% encircled energy fraction (EEF).

SB_Bck_Counts
The estimated background counts in the soft energy band (0.5 - 2 keV) at the position of the X-ray source, scaled to the area that corresponds to the 90% encircled energy fraction (EEF).

HB_Counts
The total (i.e., not background-subtracted) counts of the X-ray source in the hard energy band (2 - 7 keV), extracted at the source position from within the 90% encircled energy fraction (EEF).

HB_Bck_Counts
The estimated background counts in the hard energy band (2 - 7 keV) at the position of the X-ray source, scaled to the area that corresponds to the 90% encircled energy fraction (EEF).

UHB_Counts
The total (i.e., not background-subtracted) counts of the X-ray source in the ultra-hard energy band (4 - 7 keV), extracted at the source position from within the 90% encircled energy fraction (EEF).

UHB_Bck_Counts
The estimated background counts in the ultra-hard energy band (4 - 7 keV) at the position of the X-ray source, scaled to the area that corresponds to the 90% encircled energy fraction (EEF).

Detect_Bands
The spectral band(s) in which the X-ray source was detected with Poisson background fluctuation probability of < 4 x 10^-6. The letters correspond to the full band (F), soft band (S), hard band (H), and ultra-hard band (U).

FB_Flux
The 0.5-10 keV flux of the X-ray source, in units of erg s^-1 cm^-2, estimated using the Bayesian methodology of Laird et al. (2009, ApJS, 180, 102).

FB_Flux_Pos_Err
The upper 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

FB_Flux_Neg_Err
The lower 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

SB_Flux
The 0.5-2 keV flux of the X-ray source, in units of erg s^-1 cm^-2 cm^-2, estimated using the Bayesian methodology of Laird et al. (2009, ApJS, 180, 102).

SB_Flux_Pos_Err
The upper 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

SB_Flux_Neg_Err
The lower 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

HB_Flux
The 2-10 keV flux of the X-ray source, in units of erg s^-1 cm^-2, estimated using the Bayesian methodology of Laird et al. (2009, ApJS, 180, 102).

HB_Flux_Pos_Err
The upper 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

HB_Flux_Neg_Err
The lower 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

UHB_Flux
The 5-10 keV flux of the X-ray source, in units of erg s^-1 cm^-2, estimated using the Bayesian methodology of Laird et al. (2009, ApJS, 180, 102).

UHB_Flux_Pos_Err
The upper 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

UHB_Flux_Neg_Err
The lower 1-sigma error in the value of the corresponding flux parameter, in units of erg s^-1 cm^-2.

Hardness_Ratio
The hardness ratio determined using Bayesian methodology (BEHR: Park et al. 2006, ApJ, 652, 610) using the counts in the 0.5-2 and 2-7 keV spectral bands.

Hardness_Ratio_Pos_Err
The upper 1-sigma error in the value of the hardness ratio.

Hardness_Ratio_Neg_Err
The lower 1-sigma error in the value of the hardness ratio.

Xray_Phot_Quality_Flag
This flag parameter indicates the quality of the X-ray photometry, coded as follows:

    1 = the presence of a nearby source that may be contaminating the photometry;
    2 = another source was detected with the 90% EEF and that the photometry is
        likely heavily contaminated and the source position uncertain;
    0 = All other sources.

OIR_Source_Number
An index number used to identify files in online database of optical and IR counterparts.

Rainbow_Object_ID
The optical and IR counterpart identification in the Rainbow Cosmological Surveys Database (http://rainbowx.fis.ucm.es/Rainbow_Database/Home.html). See Section 4 of the reference paper for more details.

Rainbow_RA
The Right Ascension of the X-ray source in the selected equinox after registration to the Rainbow astrometry. This was given in J2000.0 decimal degrees to a precision of 10^-7 degrees (0.00036 arcseconds) in the original table.

Rainbow_Dec
The Declination of the X-ray source in the selected equinox after registration to the Rainbow astrometry. This was given in J2000.0 decimal degrees to a precision of 10^-7 degrees (0.00036 arcseconds) in the original table.

Ctrpart_RA
The Right Ascension of the optical and IR counterpart to the X-ray source. This was given in J2000.0 decimal degrees to a precision of 10^-7 degrees (0.00036 arcseconds) in the original table.

Ctrpart_Dec
The Declination of the optical and IR counterpart to the X-ray source. This was given in J2000.0 decimal degrees to a precision of 10^-7 degrees (0.00036 arcseconds) in the original table.

Ctrpart_Det_Survey
The counterpart detection survey, mainly "RAINBOW" and "SubaruR" along with "SubaruK", "PalomarJK", "MMT", "CFHTLS" or "none".

Ctrpart_Robustness
This flag parameter indicates the robustness of the counterpart, where 1=Secure and 0=Insecure or No counterpart.

Subaru_Rc_Mag
The SUBARU R_c (648.64 nm) AB magnitude of the optical/IR counterpart.

Subaru_Rc_Mag_Error
The uncertainty in the R_c magnitude of the optical/IR counterpart.

CFHTLS_IP_Mag
The CFHTLS i' (765.91 nm) AB magnitude of the optical/IR counterpart.

CFHTLS_IP_Mag_Error
The uncertainty in the i' magnitude of the optical/IR counterpart.

CFHTLS_Rp_Mag
The CFHTLS r' (623.41 nm) AB magnitude of the optical/IR counterpart.

CFHTLS_Rp_Mag_Error
The uncertainty in the r' magnitude of the optical/IR counterpart.

CFHTLS_Gp_Mag
The CFHTLS g' (483.37 nm) AB magnitude of the optical/IR counterpart.

CFHTLS_Gp_Mag_Error
The uncertainty in the g' magnitude of the optical/IR counterpart.

CFHTLS_Zp_Mag
The CFHTLS z' (882.09 nm) AB magnitude of the optical/IR counterpart.

CFHTLS_Zp_Mag_Error
The uncertainty in the z' magnitude of the optical/IR counterpart.

CFHTLS_Us_Mag
The CFHTLS u* (380.56 nm) AB magnitude of the optical/IR counterpart.

CFHTLS_Us_Mag_Error
The uncertainty in the u* magnitude of the optical/IR counterpart.

Mmt_IP_Mag
The MMT i' (777.05 nm) AB magnitude of the optical/IR counterpart.

Mmt_IP_Mag_Error
The uncertainty in the i' magnitude of the optical/IR counterpart.

Mmt_Gp_Mag
The MMT g' (476.35 nm) AB magnitude of the optical/IR counterpart.

Mmt_Gp_Mag_Error
The uncertainty in the g' magnitude of the optical/IR counterpart.

Mmt_Zp_Mag
The MMT z' (903.09 nm) AB magnitude of the optical/IR counterpart.

Mmt_Zp_Mag_Error
The uncertainty in the z' magnitude of the optical/IR counterpart.

Mmt_Up_Mag
The MMT u' (360.41 nm) AB magnitude of the optical/IR counterpart.

Mmt_Up_Mag_Error
The uncertainty in the u' magnitude of the optical/IR counterpart.

Cfhdeep_Bmag
The CFH DEEP B (440.20 nm) magnitude of the optical/IR counterpart.

Cfhdeep_Bmag_Error
The uncertainty in the B magnitude of the optical/IR counterpart.

Cfhdeep_Rmag
The CFH DEEP R (659.51 nm) magnitude of the optical/IR counterpart.

Cfhdeep_Rmag_Error
The uncertainty in the R magnitude of the optical/IR counterpart.

Cfhdeep_Imag
The CFH DEEP I (811.87 nm) magnitude of the optical/IR counterpart.

Cfhdeep_Imag_Error
The uncertainty in the I magnitude of the optical/IR counterpart.

Subaru_Ks_Mag
The Subaru MOIRCS K_s (2135.44 nm) magnitude of the optical/IR counterpart.

Subaru_Ks_Mag_Error
The uncertainty in the K_s magnitude of the optical/IR counterpart.

Caha_Jmag
The CAHA J (1202.97 nm) magnitude of the optical/IR counterpart.

Caha_Jmag_Error
The uncertainty in the CAHA J magnitude of the optical/IR counterpart.

Palomar_Jmag
The Palomar WIRC J (1243.50 nm) magnitude of the optical/IR counterpart.

Palomar_Jmag_Error
The uncertainty in the Palomar WIRC J magnitude of the optical/IR counterpart.

Palomar_Ks_Mag
The Palomar WIRC K_s (2135.30 nm) magnitude of the optical/IR counterpart.

Palomar_Ks_Mag_Error
The uncertainty in the Palomar K_s magnitude of the optical/IR counterpart.

Nicmos_Jmag
The NICMOS J F110W (1062.24 nm) magnitude of the optical/IR counterpart.

Nicmos_Jmag_Error
The uncertainty in the NICMOS J magnitude of the optical/IR counterpart.

Nicmos_Hmag
The NICMOS H F160W (1581.96 nm) magnitude of the optical/IR counterpart.

Nicmos_Hmag_Error
The uncertainty in the NICMOS H magnitude of the optical/IR counterpart.

Hstacs_Vmag
The HST/ACS V F606W (579.67 nm) magnitude of the optical/IR counterpart.

Hstacs_Vmag_Error
The uncertainty in the HST/ACS V magnitude of the optical/IR counterpart.

Hstacs_Imag
The HST/ACS I F814W (823.40 nm) magnitude of the optical/IR counterpart.

Hstacs_Imag_Error
The uncertainty in the HST/ACS I magnitude of the optical/IR counterpart.

Hstwfc3_F125_Mag
The HST/WFC3 F125 (1242.58 nm) magnitude of the optical/IR counterpart.

Hstwfc3_F125_Mag_Error
The uncertainty in the F125 magnitude of the optical/IR counterpart.

Hstwfc3_F160_Mag
The HST/WFC3 F160 (1532.47 nm) magnitude of the optical/IR counterpart.

Hstwfc3_F160_Mag_Error
The uncertainty in the F160 magnitude of the optical/IR counterpart.

Newfirm_J1_Mag
The NEWFIRM J₁ (1044.14 nm) magnitude of the optical/IR counterpart.

Newfirm_J1_Mag_Error
The uncertainty in the J₁ magnitude of the optical/IR counterpart.

Newfirm_J2_Mag
The NEWFIRM J₂ (1193.00 nm) magnitude of the optical/IR counterpart.

Newfirm_J2_Mag_Error
The uncertainty in the J₂ magnitude of the optical/IR counterpart.

Newfirm_J3_Mag
The NEWFIRM J₃ (1276.40 nm) magnitude of the optical/IR counterpart.

Newfirm_J3_Mag_Error
The uncertainty in the J₃ magnitude of the optical/IR counterpart.

Newfirm_H1_Mag
The NEWFIRM H₁ (1558.54 nm) magnitude of the optical/IR counterpart.

Newfirm_H1_Mag_Error
The uncertainty in the H₁ magnitude of the optical/IR counterpart.

Newfirm_H2_Mag
The NEWFIRM H₂ (1704.88 nm) magnitude of the optical/IR counterpart.

Newfirm_H2_Mag_Error
The uncertainty in the H₂ magnitude of the optical/IR counterpart.

Newfirm_Kmag
The NEWFIRM K (2164.39 nm) magnitude of the optical/IR counterpart.

Newfirm_Kmag_Error
The uncertainty in the K magnitude of the optical/IR counterpart.

IRAC_3p6_um_Mag
The Spitzer IRAC Band 1 (3541.66 nm) magnitude of the optical/IR counterpart.

IRAC_3p6_um_Mag_Error
The uncertainty in the IRAC Band 1 magnitude of the optical/IR counterpart.

IRAC_4p5_um_Mag
The Spitzer IRAC Band 2 (4482.62 nm) magnitude of the optical/IR counterpart.

IRAC_4p5_um_Mag_Error
The uncertainty in the IRAC Band 2 magnitude

IRAC_5p8_um_Mag
The Spitzer IRAC Band 3 (5645.72 nm) magnitude of the optical/IR counterpart.

IRAC_5p8_um_Mag_Error
The uncertainty in the IRAC Band 3 magnitude

IRAC_8p0_um_Mag
The Spitzer IRAC Band 4 (7826.48 nm) magnitude of the optical/IR counterpart.

IRAC_8p0_um_Mag_Error
The uncertainty in the IRAC Band 4 magnitude of the optical/IR counterpart.

GALEX_NUV_Mag
The GALEX NUV (152.81 nm) magnitude of the ultraviolet counterpart.

GALEX_NUV_Mag_Error
The uncertainty in the NUV magnitude of the ultraviolet counterpart.

GALEX_FUV_Mag
The GALEX FUV (227.11 nm) magnitude of the ultraviolet counterpart.

GALEX_FUV_Mag_Error
The uncertainty in the FUV magnitude of the ultraviolet counterpart.

Redshift
The spectroscopic redshift z_spec of the object, where available. Values of 0.000 correspond to spectroscopically confirmed stars.

Redshift_Confidence
The spectroscopic redshift confidence. The authors consider the spectroscopic redshift to be reliable when this value is 3 or greater.

Ref_Redshift
The spectroscopic redshift reference, coded as follows:

      0 = no z_spec_;
      1 = Keck, DEEP2+3; Davis et al. (2003, SPIE, 4834, 161),
          Cooper et al. (2011, J, ApJS, 193, 14),
          Cooper et al. (2012, MNRAS, 419, 3018),
          Newman et al. (2013, ApJS, 208, 5);
      2 = MMT; Coil et al. (2009, ApJ, 701, 1484) (first time the redshifts
          published);
      3 = CFRS; Lilly et al. (1995, CDS Cat. VII/225);
      4 = SDSS DR9; Ahn et al. 2012, CDS Cat. V/139);
      5 = LBG; Steidel et al. (2003, J, ApJ, 592, 728).

Num_Phot_Points
The number of photometric points available for the fit to derive the photometric redshift.

Phot_Redshift
The photometric redshift of the object, z_p1, defined as the primary peak of the redshift probability P(z) distribution.

Phot_Redshift_68pc_Min
The 68%-confidence lower value of the photometric redshift.

Phot_Redshift_68pc_Max
The 68%-confidence upper value of the photometric redshift.

Phot_Redshift_90pc_Min
The 90%-confidence lower value of the photometric redshift.

Phot_Redshift_90pc_Max
The 90%-confidence upper value of the photometric redshift.

Phot_Redshift_Pdf
The area under the curve of the photometric redshift probability distribution P(z) computed in the range z_p1 +/- 0.1(1 + z_p1), normalized to a percentage of the entire P(z).

Phot_Redshift_Bft
The best fitting template for the photometric redshift, coded as follows:

        1 -  31 = From the Salvato et al. (2009, ApJ, 690, 1250)
                   classification scheme;
      101 - 131 = From the Ilbert et al. (2009, ApJ, 690, 1236)
                   galaxy library

Alt_Phot_Redshift
The second best solution for the photometric redshift, z_p2, when P(z_p2) exceeds 5%, otherwise left as a null.

Alt_Phot_Redshift_Pdf
The area under the curve of the photometric redshift probability distribution P(z) for the second best redshift, computed in the range z_p2 +/- 0.1(1 + z_p2), normalized to a percentage of the entire P(z). This is given only if P(z_p2) exceeds 5%.

Alt_Phot_Redshift_Bft
The best fitting template for the second best photometric redshift, coded as follows:

        1 -  31 = From the Salvato et al. (2009, ApJ, 690, 1250)
                   classification scheme;
      101 - 131 = From the Ilbert et al. (2009, ApJ, 690, 1236)
                   galaxy library

This is given only if P(z_p2) exceeds 5%.

Contact Person

Questions regarding the AEGISXDCXO database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:24:08 EDT