ACDS V10.0 - Detailed Description of J/A+A/373/63

ACDS V10.0 - Mon Jan 20 05:22:10 CET 2025

| # Detailed Description of J/A+A/373/63 : M31 second ROSAT PSPC survey (Supper+, 2001) |

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+A/373/63        M31 second ROSAT PSPC survey             (Supper+, 2001)
    ================================================================================
    The second ROSAT PSPC survey of M31 and the complete ROSAT PSPC source list.
        Supper R., Hasinger G., Lewin W.H.G., Magnier E.A., van Paradijs J.,
        Pietsch W., Read A.M., Truemper J.
       <Astron. Astrophys. 373, 63 (2001)>
       =2001A&A...373...63S
    ================================================================================
    ADC_Keywords: Galaxies, nearby ; X-ray sources ; Surveys

    Keywords: galaxies: fundamental parameters - galaxies: individual: M31 -
              galaxies: spiral - X-rays: galaxies

    Abstract:
        This paper reports the results of the analysis of the second ROSAT
        PSPC survey of M 31 performed in summer 1992. We compare our results
        with those of the first survey, already published in Supper et al.
        (1997, Cat. J/A+A/317/328). Within the ~10.7deg2 field of view,
        396 individual X-ray sources are detected in the second survey data,
        of which 164 are new detections. When combined with the first survey,
        this result in a total of 560 X-ray sources in the field of M 31.
        Their (0.1keV-2.0keV) fluxes range from 7x10-15erg/cm2/s to
        7.6x10-12erg/cm2/s, and of these 560 sources, 55 are tentatively
        identified with foreground stars, 33 with globular clusters, 16 with
        supernova remnants, and 10 with radio sources and galaxies (including
        M 32). A comparison with the results of the Einstein M 31 survey
        reveals 491 newly detected sources, 11 long term variable sources, and
        7 possible transient sources. Comparing the two ROSAT surveys, we come
        up with 34 long term variable sources and 8 transient candidates.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table5.dat       102      396   All X-ray sources found with the ROSAT PSPC
                                  during the second M31 survey
    × table6.dat       124      560   All X-ray sources coming out of a merge of the
                                  source lists from the first and second M31 survey
    × table7.dat        63       69   Identification list of a correlation between the
                                  ROSAT PSPC catalog and the X-ray source list of
                                  TF91 (Trinchieri & Fabbiano, 1991ApJ...382...82T)
                                  obtained from observations with the Einstein
                                  satellite
    × table8.dat        68      114   Table of all optical and radio identifications

    See also:
               II/144 : Brightest stars in the field of M31 (Berkhuijsen+ 1988)
               IX/30  : Second ROSAT PSPC Catalog (ROSAT, 2000)
               IX/13  : The 2E Catalogue (Harris+ 1994)
       J/ApJS/118/177 : JHK photometry of M31 spiral arm (Kodaira+, 1998)
       J/ApJ/504/113  : F175W and F275W photometry of M31 and M32 (Brown+, 1998)
       J/ApJ/324/172  : M31 UBVR photometry (Hodge+, 1988)
       J/A+A/278/36   : M 31 new OB associations (Magnier+ 1993)
       J/A+A/317/328  : ROSAT PSPC survey of M 31 (Supper+ 1997)

    Byte-by-byte Description of file:  table5.dat

       Bytes Format Units     Label   Explanations

           1  A1    ---       n_SII   [*] *: Bulge source
       2-  4  I3    ---       SII     Source number (second survey)
           6  I1    h         RAh     Right ascension (J2000)
       8-  9  I2    min       RAm     Right ascension (J2000)
      11- 14  F4.1  s         RAs     Right ascension (J2000)
          16  A1    ---       DE-     Declination sign (J2000)
      17- 18  I2    deg       DEd     Declination (J2000)
      20- 21  I2    arcmin    DEm     Declination (J2000)
      23- 24  I2    arcsec    DEs     Declination (J2000)
      26- 27  I2    arcsec    e_Pos   1 sigma position error
          29  I1    ---       Qual    [1,4] Quality class (1=best, 4=worst)
      31- 37  F7.1  ---       LH      Likelihood of detection
          39  A1    ---       l_RB    Limit flag on RB
      40- 45  F6.2  ct/ks     RB      Count rate 0.1-2.0keV
      47- 50  F4.2  ct/ks     e_RB    ? 1 sigma error in RB
          53  A1    ---       l_RS    Limit flag on RS
      54- 58  F5.2  ct/ks     RS      Count rate 0.1-0.4keV
      60- 63  F4.2  ct/ks     e_RS    ? 1 sigma error in RS
          65  A1    ---       l_RH    Limit flag on RH
      66- 71  F6.2  ct/ks     RH      Count rate 0.5-2.0keV
      73- 76  F4.2  ct/ks     e_RH    ? 1 sigma error in RH
          79  A1    ---       l_RH1   Limit flag on RH1
      80- 84  F5.2  ct/ks     RH1     Count rate 0.5-0.9keV
      86- 89  F4.2  ct/ks     e_RH1   ? 1 sigma error in RH1
          91  A1    ---       l_RH2   Limit flag on RH2
      92- 97  F6.2  ct/ks     RH2     Count rate 0.9-2.0keV
      99-102  F4.2  ct/ks     e_RH2   ? 1 sigma error in RH2

    Byte-by-byte Description of file:  table6.dat

       Bytes Format Units    Label   Explanations

       1-  2  A2    ---      Class   Note (1)
       3- 17  A15   ---      RXJ     RXJ source number
          18  A1    ---      f_RXJ   Source also correlated with Einstein (table 7)
      20- 22  I3    ---      SII     ? Number in this second survey
      24- 26  I3    ---     [SHP97]  ? Source number (first survey) (2)
          28  A1    ---      Marker  [+-] Marker of data identification (3)
          30  I1    h        RAh     Right ascension (J2000)
      32- 33  I2    min      RAm     Right ascension (J2000)
      35- 38  F4.1  s        RAs     Right ascension (J2000)
          40  A1    ---      DE-     Declination sign (J2000)
      41- 42  I2    deg      DEd     Declination (J2000)
      44- 45  I2    arcmin   DEm     Declination (J2000)
      47- 48  I2    arcsec   DEs     Declination (J2000)
      50- 51  I2    arcsec   e_Pos   1 sigma position error
          53  I1    ---      Qual    Quality class (1=best, 4=worst)
      55- 61  F7.1  ---      LH      Likelihood of detection
          63  A1    ---      l_RB    Limit flag on RB
      64- 69  F6.2  ct/ks    RB      Count rate 0.1-2.0 keV
      71- 74  F4.2  ct/ks    e_RB    ? 1 sigma error in RB
          76  A1    ---      l_RS    Limit flag on RS
      77- 81  F5.2  ct/ks    RS      Count rate 0.1-0.4 keV
      83- 86  F4.2  ct/ks    e_RS    ? 1 sigma error in RS
          88  A1    ---      l_RH    Limit flag on RH
      89- 94  F6.2  ct/ks    RH      Count rate 0.5-2.0 keV
      96- 99  F4.2  ct/ks    e_RH    ? 1 sigma error in RH
         101  A1    ---      l_RH1   Limit flag on RH1
     102-106  F5.2  ct/ks    RH1     Count rate 0.5-0.9 keV
     108-111  F4.2  ct/ks    e_RH1   ? 1 sigma error in RH1
         113  A1    ---      l_RH2   Limit flag on RH2
     114-119  F6.2  ct/ks    RH2     Count rate 0.9-2.0 keV
     121-124  F4.2  ct/ks    e_RH2   ? 1 sigma error in RH2

    Note (1): Notes:
           a: Foreground star
           b: Galaxy
           c: Supersoft source candidate
           d: Globular cluster
           e: SNR
           *: Bulge source
           ~: Variable source (ref. Table2, 3 and footnote in Sect. 4.1.1)
           +: Source with uncertain count rate
    Note (2): SI number is listed if source was seen during the first survey
         (number as listed in S97, Supper et al., Cat. J/A+A/317/328).
         No number means source was *not* seen in the first survey
         (only seen in the second).
    Note (3): Markers are:
        '+' = Source was seen in both surveys and listed data are
              from the first survey.
        '-' = Source was seen in both surveys and listed data are
              from the second survey.
      blank = Source was *only* seen in the first survey, listed data
              are being from there.

    Byte-by-byte Description of file:  table7.dat

       Bytes Format Units     Label      Explanations

           1  A1    ---       n_RXJ      [*] Bulge source
       2- 16  A15   ---       RXJ        RXJ source number
      18- 22  F5.2  10-16W/m2 FR         ROSAT Flux (1)
      24- 27  F4.2  10-16W/m2 e_FR       1 sigma error in FR
      29- 31  I3    ---       E          Einstein source number (2)
      33- 37  F5.2  10-16W/m2 FE         Einstein Flux (1)
      39- 42  F4.2  10-16W/m2 e_FE       1 sigma error in FE
      44- 47  F4.1  arcsec    Dist       Absolute distance between correlating
                                          sources
      49- 52  F4.2  ---       DistRel    Relative distance between correlating
                                          sources (3)
      54- 58  F5.2  ---       FRat       Flux ratio: FR / FE
      60- 63  F4.2  ---       e_FRat     1 sigma error in FRat

    Note (1): Model of TF91 (Trinchieri & Fabbiano, 1991ApJ...382...82T):
         Thermal Bremsstrahlung kT=5keV, NH=7x1020/cm2
         in the 0.2-4.0 keV energy band.
    Note (2): According to the source list of TF91, Trinchieri & Fabbiano,
         1991ApJ...382...82T.
    Note (3): In sigma of the geometrical combined position error of each source.

    Byte-by-byte Description of file:  table8.dat

       Bytes Format Units     Label     Explanations

       1- 15  A15   ---       RXJ       ROSAT designation
      17- 27  A11   ---       Class     Object classification
      29- 58  A30   ---       Id        Optical identifications (1)
      60- 63  F4.1  arcsec    Dist      Distance between X-ray and optical sources
      65- 68  F4.2  arcsec    e_Dist    rms uncertainty on Dist

    Note (1): Identifications:
                BA87: Battistini et al., 1987A&AS...67..447B, Bol NNN
                BA93: Battistini et al., 1993A&A...272...77B, NBol NNN
                BW93: Braun & Walterbos, 1993A&AS...98..327B, [WB92a] NNNA
                DO80: D'Odorico et al., 1980A&AS...40...67D, DDB M 31 NN
                HA94: Haiman et al., 1994A&A...286..725H, Cat. II/208
                MA94a: Magnier et al., 1994, A&AS, submitted
                MA95: Magnier et al., 1995, Cat. J/A+AS/114/215, [MPV95] N-NNN

    Acknowledgements: Rodrigo Supper ros@mpe.mpg.de

    ================================================================================
    (End)                   Rodrigo Supper [MPE],  Patricia Bauer [CDS]  22-Jun-2001