SXDSCAT - Subaru/XMM-Newton Deep Survey X-Ray Source List

Overview

This table contains the X-ray source catalog in the Subaru/XMM-Newton Deep Survey (SXDS). A continuous area of 1.14 deg² centered at R.A.= 02h 18m and Dec =- 05 degrees is mapped by seven pointings with XMM-Newton covering the 0.2 - 10 keV band. From the combined images of the EPIC pn and MOS cameras, the authors have detected 866, 1114, 645, and 136 sources with sensitivity limits of 6 x 10^-16, 8 x 10^-16, 3 x 10^-15, and 5 x 10^-15 ergs cm^-2 s^-1 in the 0.5 - 2, 0.5 - 4.5, 2 - 10, and 4.5 - 10 keV bands, respectively, with detection likelihood >=7 (corresponding to a confidence level of 99.91%). The catalog consists of 1245 sources in total, including 32 extended-source candidates. The averaged log N-log S relations are in good agreement with previous results, bridging the flux range between Chandra deep surveys and brighter surveys. The log N-log S relations show significant spatial variation among pointings on a scale of 0.2 deg². Analyzing the autocorrelation function, the authors detect significant clustering signals from the 0.5 - 2 keV band sample, which can be fit with a power-law form (theta/theta_c)^(-0.8) with a correlation length of theta_c of 5.9 (+1.0, -0.9) arcsec when the integral constraint term is included. In the 2 - 10 keV band, however, the clustering is not significant, with a 90% upper limit of theta_c < 1.5 arcsec.

Catalog Bibcode

2008ApJS..179..124U

References

The Subaru/XMM-Newton Deep Survey (SXDS). III. X-Ray Data

    Ueda Y., Watson M.G., Stewart I.M., Akiyama M., Schwope A.D., Lamer, G.,
    Ebrero J., Carrera F.J., Sekiguchi K., Yamada T., Simpson C., Hasinger, G.,
    Mateos S.
   <Astrophys. J. Suppl. 179, 124 (2008)>
   =2008ApJS..179..124U

Provenance

This table was created by the HEASARC in November 2008 based on an electronic version of Table 2 of the reference paper obtained from the Astrophysical Journal website.

Parameters

Source_Number
The SXDS source number, a running number in order of increasing J2000.0 right ascension which uniquely identifies the X-ray source.

Name
The name of the X-ray source in the style recommended by the Dictionary of Nomenclature of Celestial Objects, using the '[UWS2008] ' prefix (for Ueda, Watson, Stewart, 2008) and the X-ray source number. The HEASARC created these names, notice, as of the table creation date, in anticipation of action by the CDS.

RA
The Right Ascension of the X-ray source as determined by XMM-Newton, in the selected equinox. This was given to 10^-5 degrees (0.036 arcsec) of precision and in the J2000.0 equinox in the original table.

Dec
The Declination of the X-ray source as determined by XMM-Newton, in the selected equinox. This was given to 10^-5 degrees (0.036 arcsec) of precision and in the J2000.0 equinox 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 statistical error in the position of the X-ray source, in arcseconds, estimated through the maximum likelihood fit (the root sum square of the 1-sigma error in each direction).

USB_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the ultra-soft (0.3 -0.5 keV) band.

SB_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the soft (0.5 - 2 keV) band.

MB_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the medium (2 - 4.5 keV) band.

UHB_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the ultra-hard (4.5 - 10 keV) band.

XID_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the XID (0.5 - 4.5 keV) band.

HB_Detect_Likelihood
The maximum likelihood of the X-ray source detection in the hard (2 - 10 keV) band.

USB_Count_Rate
The vignetting-corrected count rate US of the X-ray source in the ultra-soft (0.3 - 0.5 keV) band, in ct/s.

USB_Count_Rate_Error
The 1-sigma uncertainty in the ultra-soft (0.3 - 0.5 keV) band count rate, in ct/s.

SB_Count_Rate
The vignetting-corrected count rate S of the X-ray source in the soft (0.5 - 2 keV) band, in ct/s.

SB_Count_Rate_Error
The 1-sigma uncertainty in the soft (0.5 - 2 keV) band count rate, in ct/s.

MB_Count_Rate
The vignetting-corrected count rate M of the X-ray source in the medium (2 - 4.5 keV) band count rate, in ct/s.

MB_Count_Rate_Error
The 1-sigma uncertainty in the medium (2 - 4.5 keV) band count rate, in ct/s.

UHB_Count_Rate
The vignetting-corrected count rate UH of the X-ray source in the ultra-hard (4.5 - 10 keV) band count rate, in ct/s.

UHB_Count_Rate_Error
The 1-sigma uncertainty in the ultra-hard (4.5 - 10 keV) band count rate (ct/s)

Hardness_Ratio_1
The hardness ratio HR1, defined as (S-US)/(S+US), where S and US are the soft and ultra-soft band count rates, respectively.

Hardness_Ratio_1_Error
The 1-sigma uncertainty in the hardness ratio HR1.

Hardness_Ratio_2
The hardness ratio HR2, defined as (M-S)/(M+S), where M and S are the medium and soft band count rates, respectively.

Hardness_Ratio_2_Error
The 1-sigma uncertainty in the hardness ratio HR2.

Hardness_Ratio_3
The hardness ratio HR3, defined as (UH-M)/(UH+M), where UH and M are the ultra-hard and medium band count rates, respectively.

Hardness_Ratio_3_Error
The 1-sigma uncertainty in the hardness ratio HR3.

Pointing_ID
The SXDS pointing ID in which the X-ray source was detected. The properties of these pointings are listed in Table 1 of the reference paper.

Off_Axis
The offset angle, in arcminutes, of the X-ray source from the mean optical axis of the corresponding pointing.

Exposure
The total pn-equivalent exposure for the X-ray source, i.e., the sum of pn, MOS1, and MOS2, at the source position, corrected for the vignetting in the 0.5 - 4.5 keV XID band, in seconds (s). The exposure is averaged over the source extraction region with a fixed encircled energy fraction (68%) of the PSF.

XID_Background_Rate
The background count rate in the 0.5 - 4.5 keV band at the source position, in ct/s/arcsec². The background rate is averaged over the source extraction region with a fixed encircled energy fraction (68%) of the PSF.

Source_Flag
This flag parameter is set to 'C' if the flux is determined by a multiple-source fit in order to take into account possible source confusion with nearby sources (see Section 3.2.3 of the reference paper).

Contact Person

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

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:35:42 EDT