ACDS V10.0 - Detailed Description of J/ApJS/161/185

ACDS V10.0 - Mon Feb 03 15:01:56 CET 2025

| # Detailed Description of J/ApJS/161/185 : GIS catalog project : source catalog II (Ueda+, 2005) |

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/161/185        GIS catalog project : source catalog II      (Ueda+, 2005)
    ================================================================================
    The ASCA medium sensitivity survey (The GIS catalog project): source catalog II.
        Ueda Y., Ishisaki Y., Takahashi T., Makishima K., Ohashi T.
       <Astrophys. J. Suppl. Ser., 161, 185-223 (2005)>
       =2005ApJS..161..185U
    ================================================================================
    ADC_Keywords: Galaxy catalogs ; X-ray sources

    Mission_Name: ASCA

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

    Abstract:
        In succession to the first ASCA Medium Sensitivity Survey catalog
        (AMSS-I), we present the second X-ray source catalog (AMSS-II),
        constructed from the Gas Imaging Spectrometer (GIS) data covering
        Galactic latitudes |b|>10° observed between 1997 January and 2000
        May. The AMSS-II catalog uses 306 fields and contains a total of 1190
        sources detected with significance of >5{sigma} in either the 0.7-7,
        2-10, or 0.7-2keV band. The AMSS-I and AMSS-II catalogs list a total
        of 2533 sources from an area of 278°2 and provides a unique
        database of X-ray sources in the flux range of
        10-13-10-11ergs/cm2/s (0.7-10keV). We summarize statistical
        properties of a complete X-ray sample consisting of 1969 serendipitous
        selected from AMSS-I and AMSS-II.

    Description:
        We apply the same analysis technique, data screening, and field
        selection as done for AMSS-I to the GIS data of |b|>10° observed
        between 1997 January 1 and 2000 May 1.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table1.dat       108      355   The field list of AMSS-II
    × table2.dat       132     1190   The source list of AMSS-II
    × table4.dat        59       85   The list of duplicated sources in the AMSS-I and
                                  AMSS-II catalogs

    See also:
      J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999)
      J/ApJS/133/1  : GIS catalog project : source catalog (Ueda+, 2001)

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

       Bytes Format Units      Label     Explanations

       1-  6  A6    ---        Field     Field identification (II-NNN)
           8  A1    ---        f_Field   [a] Indicates that the field is not used
                                             in Section 4 statistical analysis
      10- 13  F4.1  10+20/cm2  NH        Galactic hydrogen column density (1)
      15- 22  I8    ---        Seq       Sequence Number
      24- 43  A20   ---        Target    Target name
      45- 51  F7.3  deg        RAdeg     Average right ascension pointing (J2000)
      53- 59  F7.3  deg        DEdeg     Average declination pointing (J2000)
      61- 63  I3    deg        Roll      Roll angle (2)
      65- 74  A10 "YYYY/MM/DD" Obs1.Date  Date of beginning of observation
      76- 77  I2    h          Obs1.h    Hour observation began
      79- 80  I2    min        Obs1.m    Minute observation began
      82- 91  A10 "YYYY/MM/DD" Obs2.Date  Date of end of observation
      93- 94  I2    h          Obs2.h    Hour observation ended
      96- 97  I2    min        Obs2.m    Minute observation ended
      99-103  F5.1  ks         ExpTime   Exposure time
     105-108  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 (1AXG JHHMMSS+DDMM in Simbad)
      19- 26  F8.4  deg     RAdeg     Right ascension (J2000)
      28- 35  F8.4  deg     DEdeg     Declination (J2000)
      37- 40  F4.2  arcmin  e_pos     The 90% error radius (1)
      42- 46  F5.1  ---     SigF      Full 0.7-7keV {sigma} detection significance
      48- 52  F5.1  ---     SigH      Hard 2-10keV {sigma} detection significance
      54- 58  F5.1  ---     SigS      Soft 0.7-2keV {sigma} detection significance
      60- 64  F5.1  ct/ks   CRF       Full 0.7-7keV count rate (2)
      66- 70  F5.1  ct/ks   CRH       Hard 2-10keV count rate (2)
      72- 76  F5.1  ct/ks   CRS       Soft 0.7-2keV count rate (2)
      78- 82  F5.1  ct/ks   CRFc      Corrected full 0.7-7keV count rate (3)
      84- 88  F5.1  ct/ks   CRHc      Corrected hard 2-10keV count rate (3)
      90- 94  F5.1  ct/ks   CRSc      Corrected soft 0.7-2keV count rate (3)
      96-100  F5.1 10-16W/m2 FluxF    Full 0.7-7keV flux in 10-13ergs/s/cm2 (4)
     102-106  F5.1 10-16W/m2 FluxH    Hard 2-10keV flux in 10-13ergs/s/cm2 (4)
     108-112  F5.1 10-16W/m2 FluxS    Soft 0.7-2keV flux in 10-13ergs/s/cm2 (4)
     114-118  F5.2  ---     HR        Hardness ratio (5)
     120-123  F4.2  ---     e_HR      Uncertainty in HR
     125-130  A6    ---     Field     Field identification (II-NNN)
         132  A1    ---     f_Field   [*] Indicates the target source

    Note (1): Including both the statistical and systematic errors. See text
              (section 3.3 of Paper I, J/ApJS/133/1) 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 of Paper I, J/ApJS/133/1).
    Note (5): HR=(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.

    Byte-by-byte Description of file:  table4.dat

       Bytes Format Units     Label     Explanations

       1-  4  A4    ---       ---       [1AXG]
       6- 17  A12   ---       1AXG      Source name
      19- 24  A6    ---       Field     Field identification (I-NNN)
      26- 29  A4    ---       ---       [1AXG]
      31- 42  A12   ---       1AXGb     Source name
      44- 49  A6    ---       Fieldb    Field identification (I-NNN or II-NNN)
      51- 54  F4.2  arcmin    Sep       Angular separation of the two positions
      56- 59  F4.2  arcmin    e_Sep     The combined 90% positional error in Sep

    History:
        From electronic version of the journal

    References:
      Ueda et al., Paper I     2001ApJS..133....1U, Cat. J/ApJS/133/1
    ================================================================================
    (End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    14-Jun-2006