ACDS V10.0 - Detailed Description of J/A+AS/136/81

ACDS V10.0 - Mon Jan 20 08:23:14 CET 2025

| # Detailed Description of J/A+AS/136/81 : A ROSAT PSPC X-Ray Survey of the SMC (Kahabka, 1999) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    J/A+AS/136/81       A ROSAT PSPC X-Ray Survey of the SMC    (Kahabka, 1999)
    ================================================================================
    A ROSAT PSPC X-Ray Survey of the Small Magellanic Cloud
           Kahabka P., Pietsch W., Filipovic M.D., Haberl F.
          <Astron. Astrophys. Suppl. Ser. 136, 81 (1999)>
          =1999A&AS..136...81K      (SIMBAD/NED BibCode)
    ================================================================================
    ADC_Keywords: X-ray sources ; Magellanic Clouds ; Surveys

    Keywords: catalogues - Magellanic Clouds - X-rays: stars - X-rays: galaxies -
              ISM: supernova remnants (SNRs)

    Description:
        We present the results of a systematic search for point-like and
        moderately extended soft (0.1-2.4keV) X-ray sources in a raster of
        nine pointings covering a field of 8.95deg2 and performed with the
        ROSAT PSPC between October 1991 and October 1993 in the direction of
        the Small Magellanic Cloud (SMC). We detect 248 objects which we
        include in the first version of our SMC catalogue of soft X-ray
        sources. We set up seven source classes defined by selections in the
        count rate, hardness ratio and source extent. We find five high
        luminosity super-soft sources (1E 0035.4-7230, 1E 0056.8-7146,
        RX J0048.4-7332, RX J0058.6-7146 and RX J0103-7254), one
        low-luminosity super-soft source RX J0059.6-7138 correlating with the
        planetary nebula L357, 51 candidate hard X-ray binaries including
        eight bright hard X-ray binary candidates, 19 supernova remnants
        (SNRs), 19 candidate foreground stars and 53 candidate background
        active galactic nuclei (and quasars). We give a likely classification
        for ~60% of the catalogued sources. The total count rate of the
        detected point-like and moderately extended sources in our catalogue
        is 6.9±0.3s^-1, comparable to the background subtracted total rate
        from the integrated field of ~6.1±0.1s^-1.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat       136      248   List of all 248 ROSAT sources found in the SMC

    See also:
        IX/11 : ROSAT Source Catalog (Voges+ 1994)

    Byte-by-byte Description of file:  table1.dat

       Bytes Format Units   Label     Explanations

       1-  3  I3    ---     Catalog   Source catalog sequential number
       6- 16  A11   ---     RX        Source ROSAT name (Cat. IX/11)
      19- 20  I2    h       RAh       Right ascension (J2000)
      22- 23  I2    min     RAm       Right ascension (J2000)
      25- 28  F4.1  s       RAs       Right ascension (J2000)
          31  A1    ---     DE-       Declination sign
      32- 33  I2    deg     DEd       Declination (J2000)
      35- 36  I2    arcmin  DEm       Declination (J2000)
      38- 39  I2    arcsec  DEs       Declination (J2000)
      42- 44  I3    arcsec  Pe        90% confidence positional uncertainty
      46- 52  F7.2  ct/ks   Crate     ? total count rate
      54- 58  F5.2  ct/ks   e_Crate   ? 1-sigma error of total count rate
      61- 65  F5.2  ---     HR1       ? soft hardness ratio HR1
      67- 71  F5.3  ---     e_HR1     ? 1-sigma error of soft hardness ratio HR1
      72- 77  F6.2  ---     HR2       ? hard hardness ratio HR2
      78- 83  F6.2  ---     e_HR2     ? 1-sigma error of hard hardness ratio HR2
      86- 88  I3    arcsec  EXT       ? source extent
      90- 94  I5    ---     LH        ? likelihood ratio of existence
      97- 98  I2    arcmin  Offax     off-axis angle of source
     100-101  I2    ---     WW        ? Source number of Einstein identification
                                        Wang & Wu, 1992ApJS...78..391W
     103-104  I2    arcsec DistEinst  ? Distance to Einstein source
     106-110  A5    ---     SpType    Spectral type of Simbad star
     113-116  F4.1  ---     Mag       ? Magnitude of Simbad identified star
     118-119  I2    arcsec  DistSim   ? Distance to Simbad star
     121-124  A4    ---     Class     Source classification (1)
     126-127  A2    ---     Class1    Refined source classification (2)
     129-136  A8    ---     Note      Note on source classification

    Note (1): A: background AGN or quasar
              B: hard X-ray binary
             Bl: luminous hard X-ray binary
             Bw: weak hard X-ray binary
              D: (possible) artifact
              F: foreground star
              R: supernova remnant or extended structure
              S: super-soft source
             Sl: luminous super-soft source
             Sw: weak super-soft source
    Note (2): AB: class A or B (see Note 1)
               H: HII region

    Acknowledgements: Peter Kahabka ptk@astro.uva.nl

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    (End)                                         Patricia Bauer [CDS]   18-Dec-1998