ACDS V10.0 - Detailed Description of J/ApJS/117/319

ACDS V10.0 - Sun Jan 19 12:35:22 CET 2025

| # Detailed Description of J/ApJS/117/319 : Northern RASS X-ray sources catalog (Appenzeller+ 1998) |

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/ApJS/117/319      Northern RASS X-ray sources catalog     (Appenzeller+ 1998)
    ================================================================================
    Identification of a complete sample of northern ROSAT All-Sky Survey X-ray
    sources. III. The catalog.
           Appenzeller I., Thiering I., Zickgraf F.-J., Krautter J., Voges W.,
           Chavarria C., Kneer R., Mujica R., Pakull M., Rosso C., Ruzicka F.,
           Serrano A., Ziegler B.
          <Astrophys. J. Suppl. Ser. 117, 319 (1998)>
          =1998ApJS..117..319A
    ================================================================================
    ADC_Keywords: Radio sources ; Photometry

    Mission_Name: ROSAT

    Keywords: galaxies: active - galaxies: clusters: general - surveys -
              X-rays: galaxies - X-rays: general - X-rays: stars

    Abstract:
        We present a catalog of optical identifications of a representative
        sample of northern ({delta})>-9°) ROSAT All-Sky Survey (RASS)
        sources. A full identification has been carried out for a count-rate-
        and area-limited complete RASS subsample comprising 674 sources. All
        sources are within six study areas outside the galactic plane
        (|b|>19.6°), one area being near the north Galactic pole and one
        near the north ecliptic pole.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat       151      674   Count-rate- and area-limited X-ray
                                      complete subsample
    × table2.dat       151       70   Additional sources outside the count-rate- and
                                      Area-limited subsample
    × notes.dat         80      452   Individual notes

    See also:
          IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
        VIII/14 : 87GB Catalog of radio sources (Gregory et al., 1991)

    Byte-by-byte Description of file:  table1.dat  table2.dat

       Bytes Format Units      Label     Explanations

       1-  4  A4    ---        Seq       Internal designation for the X-ray sources
                                          in the six study areas (1)
       6- 16  A11   ---        RXJ       RXJ designation
      18- 19  I2    h          RAh       X-source right ascension (J2000)
      21- 22  I2    min        RAm       X-source right ascension (J2000)
      24- 27  F4.1  s          RAs       X-source right ascension (J2000)
          29  A1    ---        DE-       X-source declination sign (J2000)
      30- 31  I2    deg        DEd       X-source declination (J2000)
      33- 34  I2    arcmin     DEm       X-source declination (J2000)
      36- 37  I2    arcsec     DEs       X-source declination (J2000)
      39- 44  F6.3  ct/s       CRate     Net X-ray source count rate (2)
      46- 50  F5.3  ct/s       e_CRate   rms uncertainty on CountRate
      52- 57  F6.2  ---        HR1       Hardness ratio HR1 (3)
      59- 63  F5.2  ---        e_HR1     rms uncertainty on HR1
      65- 69  F5.2  ---        HR2       Hardness ratio HR2 (3)
      71- 75  F5.2  --         e_HR2     rms uncertainty on HR2
      77- 81  F5.1  10-13mW/m2 FX        X-ray flux
      83- 85  I3    arcsec     DRA       ? RA(X)-RA(O) (4)
      87- 89  I3    arcsec     DDE       ? DE(X)-DE(O) (4)
          91  I1    ---        Q         [1-4] Identification quality index (5)
      93- 99  A7    ---        Class     Classification of the optical
                                          counterpart (6)
     101-107  A7    ---        SpType    Spectral type for stellar sources
     109-113  F5.3  ---        z         ? Redshift for extragalactic sources
     115-119  F5.2  mag        Vmag      ? V magnitude
     121-125  F5.2  mag        B-V       ? B-V colour index
     127-131  F5.2  ---        XV        ? XV index (log(fX/fV) (7)
     133-136  I4    mJy        F4.85GHz  ? Radio flux at 4.85GHz (6cm) for sources
                                            within 0°<DE<+75°, from Gregory
                                            and Condon (1991, Cat. VIII/14)
     138-149  A12   ----       Name      designation of the (main) optical
                                          counterpart, if known (8)
         151  A1    ---        Rem       [R] remark detailed in file notes.dat

    Note (1): The letters A through F refer to study areas I, II, III, IV, V and VI.

    Note (2): Net X-ray source count rate as derived after superposition of all
               ROSAT scan stripes and correction for vignetting and dead time.
    Note (3): HR1=(B-A)/(B+A) and HR2=(D-C)/(D+C)
           A: integrated counts in the energy range 0.11-0.41keV
           B: integrated counts in the energy range 0.52-2.01keV.
           C: integrated counts in the energy range 0.52-0.90keV.
           D: integrated counts in the energy range 0.91-2.01keV.
    Note (4): No values for extended objects (such as clusters), double stars
          and other cases where no accurate position could be determined.
    Note (5): the quality index takes the values:
           1: reliable identifications based on our own observations
           2: reliable informations with a known object based on literature data
           3: likely but uncertain identifications
           4: case in which no plausible optical counterpart could be found
    Note (6): For multiple (maximum 3) counterparts, the entries are listed in
        order of likelihood or assumed relative contribution to the total
        X-ray flux and are separated by a colon.
          st: normal star (i.e., an unresolved objects showing a stellar
               absorption spectrum, including late-type stars showing
               chromospheric emission lines, such as dMe stars).
          ES: (hot) emission-line star (unresolved objects showing a blue
               continuum, with or without absorption lines, and unshifted
               emission lines. Most objects classified ES show typical CV
               spectra).
          WD: white dwarf (star showing absorption lines with FWHM>1500km/s).
         WDA: white dwarf with Balmer lines only.
          S1: Seyfert 1 galaxy (galaxy with an unresolved nucleus showing a
               Seyfert-type spectrum with broad (>2000km/s) permitted lines and
               with MB>-23.5).
         S15..S19: Seyfert galaxy of type 1.5-1.9
         NL1: Narrow-line Seyfert 1 galaxy (spectrum showing line ratios
               typical of Seyfert 1 but with lower FWHM of permitted lines).
          S2: Seyfert 2 galaxy
          LI: LINER
         QSO: quasi-stellar object (unresolved or resolved object with
               MB<-23.5 showing a Seyfert 1 spectrum).
         BLL: BL Lac object
           G: (single) galaxy
         Gin: interacting galaxy pair
          Gr: radio galaxy
         GSB: starburst galaxy
           C: cluster or group of galaxies
    Note (7): Decadic logarithm of the ratio of the X-ray flux and the visual flux

    Note (8): For stars, the entry numbers in the most common star catalogs
        are listed. For other objects, the corresponding designations and
        abbreviations listed in the NED and SIMBAD databases are given. In a
        few cases of very long designations, the names have been shortened or
        truncated. Since in all these cases coordinate information is given in
        the table, this should not result in ambiguities. The full
        designations can be obtained from the NED. Although in the Remarks
        (Sect. 3, below) NRAO VLA Sky Survey (NVSS) (Condon et al., 1998, Cat.
        J/AJ/115/1693) data are quoted for some sources, no NVSS
        designations are used since the final version of the NVSS catalog is
        still listed as "in preparation."--------------------------------------------------------------------------------

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

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

       Bytes Format Units   Label     Explanations

       1-  4  A4    ---     Seq       Sequential number
       6- 80  A75   ---     Note      Text of the note

    History:
      * 24-Sep-1998: From ApJS electronic version
      * 28-Nov-2000: In agreement with the author
        (I.Appenzeller@lsw.uni-heidelberg.de), the designations of the optical
        counterparts (column "Name") were corrected for sources "Seq"
        - table1: A038 A095 E003 B186 B142 C089 C090 B045
        - table2: A140 E215 E276

    References:
       Zickgraf et al., Paper I.            1998AN....319...42Z
       Zickgraf et al., Paper II.           1997A&AS..123..103Z
       Zickgraf et al., Paper V.            1997A&A...323L..21Z
       Zickgraf et al., Paper VI.           1998A&A...339..457Z
    ================================================================================
    (End)                           James Marcout, Patricia Bauer [CDS]  24-Sep-1998