ACDS V10.0 - Detailed Description of J/MNRAS/311/456

ACDS V10.0 - Sun Jan 19 12:35:23 CET 2025

| # Detailed Description of J/MNRAS/311/456 : RIXOS source catalogue (Mason+, 2000) |

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/MNRAS/311/456     RIXOS source catalogue                   (Mason+, 2000)
    ================================================================================
    The ROSAT International X-ray/Optical Survey (RIXOS): source catalogue
        Mason K.O., Carrera F.J., Hasinger G., Andernach H.,
        Aragon-Salamanca A., Barcons X., Bower R., Brandt W.N.,
        Branduardi-Raymont G., Burgos-Martin J., Cabrera-Guerra F., Carballo R.,
        Castander F., Ellis R.S., Gonzalez-Serrano J.I., Martinez-Gonzalez E.,
        Martin-Mirones J.M., McMahon R.G., Mittaz J.P.D., Nicholson K.L.,
        Page M.J., Perez-Fournon I., Puchnarewicz E.M., Romero-Colmenero E.,
        Schwope A.D., Vila B., Watson M.G., Wonnacott D.
      <Mon. Not. R. Astron. Soc. 311, 456 (2000)>
      =2000MNRAS.311..456M
    ================================================================================
    ADC_Keywords: X-ray sources ; Surveys

    Mission_Name: ROSAT

    Keywords: surveys - stars: late-type - galaxies: active -
              galaxies: clusters: general - quasars: general - X-rays: general

    Description:
        We describe the ROSAT International X-ray/Optical Survey
        (RIXOS), a medium-sensitivity survey and optical identification
        of X-ray sources discovered in ROSAT high Galactic latitude
        fields (|b|>280) and observed with the Position Sensitive Proportional
        Counter (PSPC) detector. We presents a catalogue of the RIXOS sources
        and their optical identifications.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × rixos.dat        188      404   RIXOS Source Catalogue (table2 of paper)
    × table1.dat        86       82   ROSAT fields used in the RIXOS survey
    × table3.dat        54       58   Catalogue of identifications of RIXOS sources

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

       Bytes Format Units     Label   Explanations

       1-  3  A3    ---       ---     [RXJ]
       4- 18  A15   ---       RXJ     Source designation, derived from the J2000
                                       coordinates of the X-ray centroid
      20- 22  I3    arcsec    r90     ? X-ray 90% confidence positional radius
      24- 25  I2    h         RAh     Right ascension (J2000) (1)
      27- 28  I2    min       RAm     Right ascension (J2000) (1)
      30- 34  F5.2  s         RAs     Right ascension (J2000) (1)
          36  A1    ---       DE-     Declination sign (J2000) (1)
      37- 38  I2    deg       DEd     Declination (J2000) (1)
      40- 41  I2    arcmin    DEm     Declination (J2000) (1)
      43- 46  F4.1  arcsec    DEs     Declination (J2000) (1)
      48- 52  F5.1  10-17W/m2 SX      ? X-ray flux (0.5-2.0 keV) derived from the
                                        measured count rate assuming a spectral
                                        slope of {alpha}=-1. (2)
      54- 58  F5.1  10-17W/m2 SX2     ? X-ray flux (0.5-2.0 keV) derived from the
                                        best fit spectral slope and (with the
                                        exception of stellar IDs) after correcting
                                        for Galactic absorption
      60- 64  F5.1  ct/ks     XCR     ? X-ray count rate per 1000s.
      66- 68  F3.1  ct/ks     e_XCR   ? rms uncertainty on XCR
      70- 73  I4    ct        MLC     ? Tolal X-ray counts based on maximum
                                        likelihood fits
      75- 78  F4.1  ---       SI      ? X-ray spectral index (3)
      80- 82  F3.1  ---       e_SI    ? rms uncertainty on SI
          84  A1    ---       n_Mag   Magnitude considered (4)
      85- 89  F5.2  mag       Mag     ? Magnitude of the optical counterpart (or
                                        the brightest galaxy for clusters)
      91- 95  F5.1  ---       SIopt   ? Slope of the optical continuum (5)
          97  A1    ---       u_ID    uncertainty flag on ID
      99-106  A8    ---       ID      Category of optical ID  (6)
     107-114  A8    ---       Type    ID subtype.
         118  A1    ---       u_z     Uncertainty flag on z
     120-124  F5.3  ---       z       ? Redshift of extragalactic counterparts
     126-172  A47   ---      EmLines  Emission lines observed in AGN and ELG IDs
     174-175  I2    1000km/s  FWHM    ? FWHM of the emission line followed by "*",
                                        rounded down to the nearest integer (7)
         176  A1    ---       u_FWHM  rms uncertainty on FWHM
     178-180  A3    ---       Note    [NIC ] Note (8)
     182-188  A7    ---       RIXOS   RIXOS Field (ID) and Source ID (SID) for
                                       cross reference to other RIXOS papers

    Note (1): J2000 coordinates of the optical counterpart if it is a single object.
              For clusters and unidentified sources the X-ray centroid is given.
    Note (2): Flux used to define membership in the catalogue.

    Note (3): X-ray spectral index defined such that
           FX{prop.to}E{alpha}X_^
        and derived by fitting three colour X-ray data assuming Galactic
        absorption (except for stellar IDs).
        See Mittaz et al. (1999MNRAS.308..233M) for details.
    Note (4): the origin of the magnitude is:
        C - from other catalogues (see Table 3);
        E - from APM measurements of POSS-E plates;
        O - from APM measurements of POSS-O plates;
        R - from R-band CCD images;
        V - from V-band CCD images;
        S - slit magnitudes derived by folding the spectrum through and
             R-band response.
        The typical accuracy of the slit magnitudes is about 30% (see
        Puchnarewicz et al., 1996MNRAS.281.1243P).
    Note (5): Uncertainties in the slope are about 50% and dominated by
        systematic effects. See Puchnarewicz et al. (1996MNRAS.281.1243P).
    Note (6): The number in parenthesis following the category "Clus" indicates
        the number of cluster galaxies whose redshifts have been measured.
    Note (7): Preference is given to the H{beta} or MgII lines when they are
        available and well defined. Otherwise the best defined permitted line
        in the spectrum is used. More complete details of emission line
        measurements are given in Puchnarewicz et al (1997MNRAS.291..177P).
    Note (8): Signifies that there is a catalogue cross-reference in table 3 (C),
        an additional note in section 3.2 (N), or that there is a CCD image
        of the field in Fig. 4 (I).

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

       Bytes Format Units    Label     Explanations

           1  A1    ---      n_RIXOS   [*] *: RIXOS3 sample
       3-  5  I3    ---      RIXOS     RIXOS field ID
       7- 13  A7    ---      ROR       ROSAT observation request number
      15- 19  F5.2 10+20cm-2 NH        Galactic absorbing column in the direction
                                       of the field centre derived from Stark et al.
                                       (1992ApJS...79...77S) in 1020atoms/cm2
      21- 25  I5    s        ExpTime   Total ROSAT exposure time used for the
                                        detection
      27- 31  I5    s        SpeTime   ? ROSAT exposure time used for the spectral
                                         analysis
          32  A1    ---      Note      [abc] Note about the original data (1)
      34- 35  I2    h        RAh       Field center right ascension (J2000)
      37- 38  I2    min      RAm       Field center right ascension (J2000)
      40- 41  I2    s        RAs       [0/60] Field center right ascension (J2000)
          43  A1    ---      DE-       Field center declination sign (J2000)
      44- 45  I2    deg      DEd       Field center declination (J2000)
      47- 48  I2    arcmin   DEm       Field center declination (J2000)
      50- 51  I2    arcsec   DEs       [0/60] Field center declination (J2000)
      53- 56  F4.2  arcmin   Rad       Excluded radius around the target
      58- 59  I2    ---      Ntot      Total number of RIXOS sources in the field
      61- 62  I2    ---      Nid       Number of secure identifications in field
          64  I1    ---      Np        Number of probable identifications
      66- 86  A21   ---      Target    Name of the ROSAT target

    Note (1): the following symbols are used:
       a = No ROSAT public data available at the time of the spectral analysis
       b = Detection image coadded from several individual images. The ROR
           number given correspond to the single longest exposure, that was
           also used for the spectral analysis.
       c = No spectral analysis performed because no sources were detected in
           this field above the survey flux limit

    Byte-by-byte Description of file:  table3.dat

       Bytes Format Units   Label     Explanations

       1-  3  A3    ---     ---       [RXJ]
       4- 18  A15   ---     RXJ       RIXOS source name
      20- 54  A35   ---     Names     Identification in other catalogues

    Acknowledgements: Francisco J. Carrera fjc@mssl.ucl.ac.uk

    History:
      * 07-Feb-2000: Original version (communicated by Francisco J. Carrera)
           In this version, the source RXJ111809.9+212554 (RIXOS 123_84)
           was inadvertently omitted at CDS
      * 22-Nov-2013: the missing source RIXOS 123_84 was added.
    ================================================================================
    (End)                                          Patricia Bauer [CDS]  07-Feb-2000