XMMOMCDFS - XMM-Newton Optical Monitor Chandra Deep Field-South UV Catalog

Overview

The XMM-Newton X-ray observatory has performed repeated observations of the Chandra Deep Field-South (CDFS) in 33 epochs (2001 - 2010) through the XMM-CDFS Deep Survey (Comastri et al. 2011, A&A, 526, L9). During the X-ray observations, the XMM-Newton Optical Monitor (XMM-OM) targeted the central 17 x 17 arcmin² region of the X-ray field of view, providing simultaneous optical/UV coverage of the CDFS. The resulting set of data can be taken into account to build an XMM-OM catalog of the CDFS, filling the UV spectral coverage between the optical surveys and GALEX observations. This table contains the UV catalog of the XMM-CDFS Deep Survey. Its main purpose is to provide complementary UV average photometric measurements of known optical/UV sources in the CDFS, taking advantage of the unique characteristics of the survey. The data reduction is intended also to improve the standard source detection on individual observations, by cataloguing faint sources through the stacking of their exposure images. The authors reprocessed the XMM-OM data of the survey and stacked the exposures from consecutive observations using the standard SAS tools to process the data obtained during single observations. Average measurements of detections with SAS good quality flags from individual observations and from stacked images have been joined to compile the catalogue. Sources have been validated through the cross-identification within the ESO Imaging Survey (EIS: Arnouts et al. 2001, A&A, 379, 740) and COMBO-17 (Wolf et al. 2004, A&A, 421, 913; 2008, A&A, 492, 933) surveys.

Photometric data of 1129 CDFS sources are provided in the main catalog, and optical/UV/X-ray photometric and spectroscopic information from other surveys are also included. The stacking extends the detection limits by ~1 mag in the three UV bands, contributing 30% of the catalogued UV sources. The comparison with the available measurements in similar spectral bands confirms the validity of the XMM-OM calibration. The combined COMBO-17/X-ray classification of the "intermediate" sources (e.g. optically diluted and/or X-ray absorbed AGN) is also discussed in the reference paper.

Catalog Bibcode

2015A&A...574A..49A

References

The XMM Deep Survey in the CDF-S.
VIII. UV catalogue of the Optical Monitor observations.
    Antonucci M., Talavera A., Vagnetti F., Trevese D., Comastri A.,
    Paolillo M., Ranalli P., Vignali C.
    <Astron. Astrophys. 574, A49 (2015)>
    =2015A&A...574A..49A        (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in June 2015 based on the union of CDS Catalog J/ApJS/217/4/ files omcdfst7.dat (the 1,129 sources in the main catalog) and omcdfst8.dat (the 44 sources in the supplementary catalog).

HEASARC Implementation

This HEASARC table of 1,173 entries is the union of the main XMMOMCDFS catalog, which provides photometric measurements for 1,129 CDFS sources from individual observations and/or from the stacked images and includes optical/UV/X-ray photometric and spectroscopic information from other surveys, with the supplementary XMMOMCDFS catalog, which contains 44 alternative XMM-OM identifications for 38 EIS/COMBO-17 sources. Entries from the main catalog are identified by the value of 'main' for the source_sample parameter, while entries from the supplementary catalog are identified by the value of 'supp' for the source_sample parameter.

Parameters

Source_Sample
This parameter is set to 'main' for the 1,129 sources from the main XMMOMCDFS catalog, or to 'supp' for the 44 sources from the supplementary XMMOMCDFS catalog.

Source_Number
This is a reference sequential source number, arbitrarily assigned to the object. It is a unique identifier for the 1,129 sources from the main catalog (source_sample = 'main'). For the 44 sources in the supplementary catalog (source_sample = 'supp'), which are alternative XMM-OM identifications for 38 EIS/COMBO-17 sources, the combination of source_number and multiplicity_index is required in order to uniquely identify them.

Multiplicity_Index
This flag parameter is set to 'a' or 'b' for the first and second alternative XMM-OM identifications of 38 of the EIS/COMBO-17 sources (cross_id_flag = 3).

Name
The XMMOMCDFS source designation, being the concatenation of the 'XMMOMCDFS' prefix, the source number, and the multiplicity index (if non-blank).

RA
The Right Ascension of the object in the selected equinox, computed by averaging the mean coordinates of the detections in each UV band. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Dec
The Declination of the object in the selected equinox, computed by averaging the mean coordinates of the detections in each UV band. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

LII
The Galactic Longitude of the object.

BII
The Galactic Latitude of the object.

UVW2_Flag
This parameter indicates whether the source has been detected in the corresponding filter in individual observations (value of 'o') or in stacked images (value of 's').

UVW2_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVW2_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVW2_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

UVW2_Significance
The average significance of the detection of the object in the corresponding filter.

UVW2_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

UVW2_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

UVW2_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

UVW2_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

UVW2_Mag
The average AB magnitude of the object in the corresponding filter.

UVW2_Mag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

UVW2_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

UVM2_Flag
This parameter indicates whether the source has been detected in the corresponding band in individual observations (value of 'o') or in stacked images (value of 's').

UVM2_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVM2_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVM2_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

UVM2_Significance
The average significance of the detection of the object in the corresponding filter.

UVM2_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

UVM2_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

UVM2_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

UVM2_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

UVM2_Mag
The average AB magnitude of the object in the corresponding filter.

UVM2_Mag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

UVM2_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

UVW1_Flag
This parameter indicates whether the source has been detected in the corresponding band in individual observations (value of 'o') or in stacked images (value of 's').

UVW1_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVW1_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

UVW1_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

UVW1_Significance
The average significance of the detection of the object in the corresponding filter.

UVW1_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

UVW1_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

UVW1_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

UVW1_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

UVW1_Mag
The average AB magnitude of the object in the corresponding filter.

UVW1_Mag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

UVW1_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

Umag_Flag
This parameter indicates whether the source has been detected in the corresponding band in individual observations (value of 'o') or in stacked images (value of 's').

Umag_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table

Umag_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Umag_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

Umag_Significance
The average significance of the detection of the object in the corresponding filter.

Umag_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

Umag_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

Umag_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

Umag_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

Umag
The average AB magnitude of the object in the corresponding filter.

Umag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

Umag_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

Bmag_Flag
This parameter indicates whether the source has been detected in the corresponding band in individual observations (value of 'o') or in stacked images (value of 's').

Bmag_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Bmag_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Bmag_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

Bmag_Significance
The average significance of the detection of the object in the corresponding filter.

Bmag_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

Bmag_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

Bmag_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

Bmag_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

Bmag
The average AB magnitude of the object in the corresponding filter.

Bmag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

Bmag_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

Vmag_Flag
This parameter indicates whether the source has been detected in the corresponding band in individual observations (value of 'o') or in stacked images (value of 's').

Vmag_RA
The average Right Ascension of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Vmag_Dec
The average Declination of the detection of the object in the corresponding filter in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10^-6 degrees in the original table.

Vmag_Error_Radius
The 1-sigma mean positional uncertainty, in arcseconds, of the detection of the object in the corresponding filter.

Vmag_Significance
The average significance of the detection of the object in the corresponding filter.

Vmag_Count_Rate
The mean count rate of the object in the corresponding filter, in counts s^-1.

Vmag_Count_Rate_Error
The uncertainty in the mean count rate of the object in the corresponding filter, in counts s^-1.

Vmag_Flux
The mean flux density of the object in the corresponding filter (corresponding to the effective wavelength of that band), in erg s^-1 cm^-2 Angstrom^-1.

Vmag_Flux_Error
The uncertainty in the mean flux density of the object in the corresponding filter, in erg s^-1 cm^-2 Angstrom^-1.

Vmag
The average AB magnitude of the object in the corresponding filter.

Vmag_Error
The uncertainty in the average AB magnitude of the object in the corresponding filter.

Vmag_Number_Obs
The number of individual observations (or stacked images) in which the source has been detected (without bad quality flags) in the corresponding filter.

Eis_Name
The name of the ESO Imaging Survey (EIS) cross-identification of the OM source in the shortest wavelength band which was available, e.g., 'EIS JHHMMSS.ss-DDMMSS.s'.

Eis_Filter
The filter name of the shortest wavelength band for which an EIS cross-identification was obtained.

Combo_Name
The name of the COMBO-17 cross-identification of the OM source, e.g., 'WMK2004 nnnnn', using the '[WMK2004]' prefix for Wolf, Meisenheimer, Kleinheinrich (2004, A&A, 421, 913) and the source number nnnnn given therein.

Combo_Class
The COMBO-17 photometric classification, according to the following schema:

        G    = Galaxy
        S    = Star
        WD   = White dwarf
        Q    = AGN
        G/U  = Galaxy (Uncl!)
        G/S  = Galaxy (Star?)
        Q/G  = QSO (Gal?)
        S.O. = Strange Object

Cross_Id_Flag
The cross-identification flag parameter CIF defined in Section 2.3 of the reference paper and referring to the reliability of the identification within the EIS and the COMBO-17 surveys, as follows (where the values 1, 3, and 4 indicate the sources with no unique cross-identification, analogous to the notes related to the cross-correlations with the other CDF-S surveys):

          0 = Confirmed XMM-OM detection with reliable, unique EIS/COMBO-17
               cross-identification
          1 = Reliable XMM-OM counterpart of an EIS/COMBO-17 source with
               multiple XMM-OM cross-identifications
          2 = Confirmed UVW2/UVM2 detection without UVW1 and U counterparts
          3 = Ambiguous XMM-OM counterpart of an EIS/COMBO-17 source with
               multiple XMM-OM cross-identifications
          4 = Ambiguous EIS/COMBO-17 counterpart of an XMM-OM source with
               multiple EIS/COMBO-17 cross-identifications
          5 = Dubious UVW1 detection without U counterpart, or potentially
               wrong cross-identification in the EIS and/or COMBO-17 survey

GALEX_Source_Number
The GALEX source number of the cross-identification of the OM source.

CXO_Source_Number
The source number of the cross-identification of the OM source in the Chandra 4-Ms source catalog (available at the HEASARC as the CHANDFS4MS table) counterpart.

CXO_FB_Flux
The 0.5-8 keV (observed frame) flux of the Chandra 4-Ms source catalog counterpart of the OM source, in erg s^-1 cm^-2.

CXO_SB_Flux
The 0.5-2 keV (observed frame) flux of the Chandra 4-Ms source catalog counterpart of the OM source, in erg s^-1 cm^-2.

CXO_HB_Flux
The 2-8 keV (observed frame) flux of the Chandra 4-Ms source catalog counterpart of the OM source, in erg s^-1 cm^-2.

CXO_Photon_Index
The effective photon index of the Chandra 4-Ms source catalog counterpart of the OM source.

CXO_Class
The combined X-ray/optical classification of the source (see Section 3.2 of the reference paper for more details), coded as follows:

          G = Galaxy
          S = Star
          A = AGN

XMM_Source_Number
The source number of the cross-identification of the OM source in the XMM-Newton 2-10keV Point Source Catalog (available at the HEASARC as the XMMCDFS210 table) counterpart.

XMM_HB_Flux
The 2-10 keV (observed frame) flux of the XMM-Newton point source catalog counterpart of the OM source, in erg s^-1 cm^-2

Redshift
The estimated spectroscopic redshift of the source obtained from the Arizona CDFS Environment Survey (ACES: Cooper et al. 2012, MNRAS, 425, 2116) or from the ESO CDF-S Master Catalog (see reference list below).

Ref_Redshift
The coded reference for the estimate for the spectroscopic redshift as follows:

         A  = ACES, Cooper et al., 2012, MNRAS, 425, 2116
         L  = Le Fevre et al., 2005, A&A, 439, 845
         M  = Mignoli et al., 2005, A&A, 437, 883
         P  = Popesso et al., 2009, A&A, 494, 443,
              Balestra et al., 2010, A&A, 512, A12
         Si = Silverman et al., 2010, ApJS..191, 124
         Sz = Szokoly et al., 2004, ApJS, 155, 271
         V  = Vanzella et al., 2008, A&A, 478, 83

Log_UV_Luminosity
The logarithm of the specific luminosity L_UV (at 250 nm in the ultraviolet band) of the object, in erg s^-1 Hz^-1 (10^-7 W Hz^-1). The quoted value (also used in calculating Alpha_ox) refers to the total emission of the source, without extracting the nuclear component.

Log_Xray_Luminosity
The logarithm of the specific luminosity L_X (at 2 keV in the X-ray band) of the object, in erg s^-1 Hz^-1 (10^-7 W Hz^-1). The X-ray specific luminosities at 2 keV were computed from the Chandra 2-8 keV fluxes, by also applying a standard power-law k-correction (the values of the photon indexes are provided by the Chandra 4 Ms source catalog). If the 2-8 keV fluxes are given as upper limits, the corresponding estimates of the X-ray-to-optical index are upper limits, too.

Alpha_Ox
The X-ray-to-optical index, Alpha_ox, of the UV source with its X-ray counterpart from the Chandra 4 Ms source catalog, where Alpha_ox = log(L_X/L_UV) / log(nu_X / nu_UV) ~ 0.384 x log(L_X / L_UV).

Final_Class
The combined classification of the object, as follows (see Section 3.2 of the reference paper for more details):

         G = Galaxy
         S = Star
        WD = White dwarf
         Q = AGN
         I = Intermediate
         U = Uncertain/Unclassified

Notes
Notes concerning source cross-identifications. Ambiguous COMBO-17, GALEX, Chandra, XMM-Newton, or ACES cross-identifications are noted here. The sequential number of the alternative,discarded identification is reported in parentheses. Notice that ACES adopts the same sequential numbers as COMBO-17.

Class
The HEASARC Browse object classification, based on the value of the final_class parameter.

Contact Person

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

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:37:17 EDT