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ROS13HRXMM - ROSAT 13-hour Field XMM-Newton X-Ray Source Catalog

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Overview

This table contains the results of a deep X-ray survey conducted with XMM-Newton, centered on the UK ROSAT 13-hours deep field area. This region covers 0.18 square degrees, and is the first of the two areas covered with XMM-Newton as part of an extensive multi-wavelength survey designed to study the nature and evolution of the faint X-ray source population. This table contains the final catalog of 225 sources. Within the central 9 arcminutes, 68% of the source positions are accurate to 2 arcseconds, making optical follow-up relatively straightforward. The authors construct the N(>S) relation in four energy bands: 0.2-0.5, 0.5-2, 2-5 and 5-10 keV. In all but the highest energy band, they find that the source counts can be represented by a double power law with a bright-end slope consistent with the Euclidean case and a break around 10^-14 erg cm^-2 s^-1. Below this flux, the counts exhibit a flattening.

The 13-hours deep field is centered on the sky coordinates RA(J2000) = 13 34 37.1, Dec (J2000) = +37 53 02.2. The XMM-Newton observations were carried out in three separate revolutions during June 2001 for a total exposure time of 200ks. Approximately 40% of the total observation time was affected by high particle background flares, arising from soft protons hitting the detector. The data were therefore temporally filtered to remove these high-background periods. Filtering reduced the total useful exposure time from ~200 ks to ~120 ks.


Catalog Bibcode

2005MNRAS.362.1371L

References

XMM-Newton 13 hours deep field - I. X-ray sources.
    Loaring N.S., Dwelly T., Page M.J., Mason K., Mchardy I., Gunn K., Moss D.,
    Seymour N., Newsam A.M., Takata T., Sekguchi K., Sasseen T., Cordova F.
   <Mon. Not. R. Astron. Soc., 362, 1371-1395 (2005)>
   =2005MNRAS.362.1371L

Provenance

This table was created by the HEASARC in August 2007 based on CDS catalog J/MNRAS/362/1371 file table9.dat.

hb count

The best-fitting number of source counts for the X-ray source in the 5.0 - 10.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

Parameters

Source_Number
A running source number in order of increasing J2000.0 Right Ascension which uniquely identifies an X-ray source.

Name
The name for the X-ray source using the '[LDP2005] ' prefix (for Loaring, Dwelly, Page 2005) and the source number, as recommended by the CDS Dictionary of Nomenclature of Celestial Objects.

RA
The Right Ascension of the X-ray source in the selected equinox. The RA was given in J2000.0 coordinates to a precision of 0.01 seconds of time in the original table. The astrometry of the individual observations was corrected for small offsets between the pointings. A source list was constructed for each observation as described in Section 2.2 of the reference paper, and cross-correlated with the optical positions of the 214 sources found in the Chandra catalogue of McHardy et al. (2003, MNRAS, 342, 802) using the SAS task eposcor. The appropriate offsets in RA and Dec. were then applied to each of the individual events to tie the XMM-Newton data to the optical/Chandra/radio coordinate frame.

Dec
The Declination of the X-ray source in the selected equinox. The Declination was given in J2000.0 coordinates to a precision of 0.01 arcseconds in the original table. The astrometry of the individual observations was corrected for small offsets between the pointings. A source list was constructed for each observation as described in Section 2.2 of the reference paper, and cross-correlated with the optical positions of the 214 sources found in the Chandra catalogue of McHardy et al. (2003, MNRAS, 342, 802) using the SAS task eposcor. The appropriate offsets in RA and Dec. were then applied to each of the individual events to tie the XMM-Newton data to the optical/Chandra/radio coordinate frame.

LII
The Galactic Longitude of the X-ray source.

BII
The Galactic Latitude of the X-ray source.

Error_Radius
The one-sigma positional error of the X-ray source from EMLDETECT, in arcseconds.

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

Usb_Counts
The best-fitting number of source counts for the X-ray source in the 0.2 - 0.5 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

Usb_Counts_Error
The 1-sigma error to the best-fitting number of source counts for the X-ray source in the 0.2 - 0.5 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

SB_Counts
The best-fitting number of source counts for the X-ray source in the 0.5 - 2.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

SB_Counts_Error
The 1-sigma error to the best-fitting number of source counts for the X-ray source in the 0.5 - 2.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

MB_Counts
The best-fitting number of source counts for the X-ray source in the 2.0 - 5.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

MB_Counts_Error
The 1-sigma error to the best-fitting number of source counts for the X-ray source in the 2.0 - 5.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

HB_Counts
XMM Count in 5-10 keV Band

HB_Counts_Error
The 1-sigma error to the best-fitting number of source counts for the X-ray source in the 5.0 - 10.0 keV band, as output by EMLDETECT. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

Usb_Flux
The flux of the X-ray source in the 0.2 - 0.5 keV band, in erg cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted energy conversion factor for this band of 4.7775 cts per 10^-11 erg cm^-2. The conversion factors from count rates to flux were determined from the EPIC response matrices, over exactly the same energy ranges as those in which the images were constructed, assuming a power-law spectrum with photon index Gamma of 1.7 (a good average within this flux range). If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

Usb_Flux_Error
The 1-sigma error to the flux of the X-ray source in the 0.2 - 0.5 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

SB_Flux
The flux of the X-ray source in the 0.5 - 2.0 keV band, in erg cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted energy conversion factor for this band of 4.8905 cts per 10^-11 erg cm^-2. The conversion factors from count rates to flux were determined from the EPIC response matrices, over exactly the same energy ranges as those in which the images were constructed, assuming a power-law spectrum with photon index Gamma of 1.7 (a good average within this flux range). If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

SB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the 0.5 - 2.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

MB_Flux
The flux of the X-ray source in the 2.0 - 5.0 keV band, in erg cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted energy conversion factor for this band of 1.9605 cts per 10^-11 erg cm^-2. The conversion factors from count rates to flux were determined from the EPIC response matrices, over exactly the same energy ranges as those in which the images were constructed, assuming a power-law spectrum with photon index Gamma of 1.7 (a good average within this flux range). If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

MB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the 2.0 - 5.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

HB_Flux
The flux of the X-ray source in the 5.0 - 10.0 keV band, in erg cm^-2 s^-1, obtained from the corresponding counts in this band and an adopted energy conversion factor for this band of 0.5929 cts per 10^-11 erg cm^-2. The conversion factors from count rates to flux were determined from the EPIC response matrices, over exactly the same energy ranges as those in which the images were constructed, assuming a power-law spectrum with photon index Gamma of 1.7 (a good average within this flux range). If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

HB_Flux_Error
The 1-sigma error to the flux of the X-ray source in the 5.0 - 10.0 keV band, in erg cm^-2 s^-1. If in any energy band there are fewer counts at the source position in the image than in the background map, then the number of source counts (and the source flux) are recorded as zero for that band. In this case, the corresponding counts error (and flux error) parameter values represent the 1-sigma upper limit.

Flux
The flux of the X-ray source in the full 0.2 - 10.0 keV band, in erg cm^-2 s^-1, obtained from the sum of the individual band fluxes.

Flux_Error
The 1-sigma error to the flux of the X-ray source in the 0.2 - 10.0 keV band, in erg cm^-2 s^-1

Chandra_Source_Number
The catalog number of the Chandra source counterpart to the XMM-Newton source, taken from McHardy et al. (2003, MNRAS, 342, 802).

Alt_Name
The name of the Chandra source counterpart (McHardy et al. 2003, MNRAS, 342, 802) to the XMM-Newton source, using the '[MGN2003] ' prefix (for McHardy, Gunn, Newsam 2003) and the Chandra source number, as recommended by the CDS Dictionary of Nomenclature of Celestial Objects.

Offset
The offset in position between the XMM-Newton source and its Chandra counterpart, in arcseconds.


Contact Person

Questions regarding the ROS13HRXMM database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 27-Aug-2007