ACDS V10.0 - Detailed Description of J/ApJS/133/1

ACDS V10.0 - Tue Dec 17 21:38:32 CET 2024

| # Detailed Description of J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 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/ApJS/133/1        GIS catalog project : source catalog     (Ueda+, 2001)
    ================================================================================
    The ASCA Medium Sensitivity Survey (the GIS catalog project): source catalog.
        Ueda Y., Ishisaki Y., Takahashi T., Makishima K., Ohashi T.
       <Astrophys. J. Suppl. Ser. 133, 1 (2001)>
       =2001ApJS..133....1U
    ================================================================================
    ADC_Keywords: Galaxy catalogs ; X-ray sources ;

    Mission_Name: ASCA

    Keywords: catalogs - diffuse radiation - galaxies: active - X-rays: galaxies -
              X-rays: general

    Abstract:
        We present the first X-ray source catalog of the ASCA Medium
        Sensitivity Survey (AMSS, or the GIS catalog project), constructed
        from data at Galactic latitudes |b|>10° observed between 1993 May
        and 1996 December. The catalog utilizes 368 combined fields and
        contains 1343 sources with the detection significance above 5{sigma}
        either in the survey bands of 0.7-7keV, 2-10keV, or 0.7-2keV,
        including target sources. For each source, the ASCA source name,
        position, a 90% error radius, count rates in the three bands,
        detection significances, fluxes, and a hardness ratio are provided.
        With extensive simulations, we carefully evaluate the data quality of
        the catalog. Results from cross-correlation with other existing
        catalogs are briefly summarized.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat       104      505   The field list of the AMSS
    × table2.dat       130     1343   The source list of the AMSS

    See also:
       J/ApJ/518/656  : ASCA Large Sky Survey (Ueda+, 1999)
       J/ApJS/161/185 : GIS catalog project : source catalog II (Ueda+, 2005)

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

       Bytes Format Units       Label     Explanations

       1-  3  I3    ---         Field     Field identification
           5  A1    ---         f_Field   [a] Indicates not used in Section 4
                                              statistical analysis
       7- 10  F4.1  10+20/cm2   NH        Galactic hydrogen column density (1)
      12- 19  I8    ---         Seq       Sequence Number
      21- 38  A18   ---         Target    Target name
      40- 46  F7.3  deg         RAdeg     Average right ascension pointing (J2000)
      48- 54  F7.3  deg         DEdeg     Average declination pointing (J2000)
      56- 58  I3    deg         Roll      Roll angle (2)
      60- 69  A10  "YYYY/MM/DD" Obs1.Date  Date observation began
      71- 72  I2    h           Obs1.h    Hour observation began
      74- 75  I2    min         Obs1.m    Minute observation began
      77- 86  A10  "YYYY/MM/DD" Obs2.Date  Date observation ended
      88- 89  I2    h           Obs2.h    Hour observation ended
      91- 92  I2    min         Obs2.m    Minute observation ended
      94- 98  F5.1  ks          Exp       Exposure time
     100-103  F4.2  ct/s        CR        Mean count rate of GIS2 and GIS3 including
                                           the background

    Note (1): Estimated from the HI map by Dickey & Lockman (1990ARA&A..28..215D).

    Note (2): Defined as that of detector-y axis measured in clockwise direction
              from the north.

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

       Bytes Format Units     Label    Explanations

       1-  4  A4    ---       ---      [1AXG]
       6- 17  A12   ---       1AXG     Source name (JHHMMSS+DDMM)
      19- 26  F8.4  deg       RAdeg    Right ascension (J2000)
      28- 35  F8.4  deg       DEdeg    Declination (J2000)
      37- 40  F4.2  arcmin    PosErr   The 90% error radius (1)
      42- 46  F5.1  ct/ks     SigF     The 0.7-7 keV {sigma} detection significance
      48- 52  F5.1  ct/ks     SigH     The 2-10 keV {sigma} detection significance
      54- 58  F5.1  ct/ks     SigS     The 0.7-2 keV {sigma} detection significance
      60- 64  F5.1  ct/ks     CRF      The 0.7-7 keV count rate (2)
      66- 70  F5.1  ct/ks     CRH      The 2-10 keV count rate (2)
      72- 76  F5.1  ct/ks     CRS      The 0.7-2 keV count rate (2)
      78- 82  F5.1  ct/ks     CRFc     The corrected 0.7-7 keV count rate (3)
      84- 88  F5.1  ct/ks     CRHc     The corrected 2-10 keV count rate (3)
      90- 94  F5.1  ct/ks     CRSc     The corrected 0.7-2 keV count rate (3)
      96-100  F5.1  10-16W/m2 FluxF    The 0.7-7keV flux in 10-13erg/s/cm2 (4)
     102-106  F5.1  10-16W/m2 FluxH    The 2-10keV flux in 10-13erg/s/cm2 (4)
     108-112  F5.1  10-16W/m2 FluxS    The 0.7-2keV flux in 10-13erg/s/cm2 (4)
     114-118  F5.2  ---       HR       Hardness ratio (5)
     120-123  F4.2  ---       e_HR     Uncertainty in HR
     125-127  I3    ---       Field    Field identification
         129  A1    ---       f_Field  Indicates the target source

    Note (1): Including both the statistical and systematic errors. See text
              (section 3.3) for details.
    Note (2): Vignetting-corrected count rate at the reference position in the XRT
              coordinate (8.5' offset) integrated within a radius of 5.9'.  Not
              corrected for Galactic absorption.
    Note (3): Corrected for Galactic absorption, estimated from
               Dickey & Lockman (1990ARA&A..28..215D)
    Note (4): Corrected for Galactic absorption. Converted from the observed count
              rate in the same band, by assuming a power law with Galactic
              absorption, with the best-fit photon index derived from the observed
              hardness ratio Ratio (see section 2.4).
    Note (5): Ratio = (H-S)/(H+S), where H and S represent the count rate corrected
              for Galactic absorption in the 2-10keV and 0.7-2keV bands,
              respectively.

    History:
        From electronic version of the journal
      * 14-Oct-2001: table1.dat, record #376: target name RD_J13434
        corrected into RX_J13434+0001
    ================================================================================
    (End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    24-Apr-2001