ACDS V10.0 - Detailed Description of VIII/82

ACDS V10.0 - Sun Jan 19 11:26:26 CET 2025

| # Detailed Description of VIII/82 : 2nd Epoch Molonglo Galactic Plane Survey (MGPS-2) (Murphy+, 2007) |

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.

    VIII/82    2nd Epoch Molonglo Galactic Plane Survey (MGPS-2)   (Murphy+, 2007)
    ================================================================================
    The 2nd Epoch Molonglo Galactic Plane Survey (MGPS-2), Version 15 August 2007.
        Murphy T., Mauch T., Green A., Hunstead R.W., Piestrzynska B.,
        Kels A.P., Sztajer P.
       <Mon. Not. R. Astron. Soc. 382, 382 (2007)>
       =2007MNRAS.382..382M
    ================================================================================
    ADC_Keywords: Galactic plane ; Radio sources ; Surveys ; Radio continuum

    Keywords: catalogues - surveys - methods: data analysis - radio continuum: ISM -
              Galaxy: general

    Description:
        The MGPS-2 (second epoch Molonglo Galactic Plane Survey) was carried
        out with the Molonglo Observatory Synthesis Telescope at a frequency
        of 843MHz and with a restoring beam of 45"x45"csd|{delta}|, making
        it he highest resolution large scale radio survey of the southern
        Galactic plane. It covers the range |b|<10° and 245<l<365°;
        it is the Galactic counterpart to the SUMSS (Cat. VIII/81) which covers
        the southern sky ({delta}<-30°, |b|>10°).

        This catalogue (15-Aug-2007) consists of 48850 compact sources, made
        by fitting elliptical gaussians in the MGPS-2 mosaics to a limiting
        peak brightness of 10mJy/beam. We used a custom method (described in
        the associated publication) to remove extended sources from the
        catalogue. Positions in the catalogue are accurate to 1-2".

        See http://www.astrop.physics.usyd.edu.au/mosaics for access to the
        mosaic images.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × mgpscat.dat      179    48850   The MGPS-2 Catalog, Version 1.0 (2007-08-15)

    See also:
        VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)
        http://www.physics.usyd.edu.au/ioa/Main/MGPS2 : the MGPS-2 Home Page

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

       Bytes Format Units    Label     Explanations

       1-  4  A4    ---      ---       [MGPS]
       6- 19  A14   ---      MGPS      MGPS designation (JHHMMSS-DDMMSS)
      21- 31  F11.7 deg      GLON      Galactic longitude (degrees)
      33- 43  F11.7 deg      GLAT      Galactic latitude (degrees)
      45- 46  I2    h        RAh       Right Ascension J2000 (hours)
      48- 49  I2    min      RAm       Right Ascension J2000 (minutes)
      51- 55  F5.2  s        RAs       Right Ascension J2000 (seconds)
          58  A1    ---      DE-       Declination J2000 (sign)
      59- 60  I2    deg      DEd       Declination J2000 (degrees)
      62- 63  I2    arcmin   DEm       Declination J2000 (minutes)
      65- 69  F5.2  arcsec   DEs       Declination J2000 (seconds)
      71- 74  F4.1  arcsec   e_RAs     rms uncertainty in Right Ascension (1)
      76- 79  F4.1  arcsec   e_DEs     rms uncertainty in Declination (1)
      83- 89  F7.1  mJy      Sp        Peak brightness at 843MHz (in mJy/beam)
      91- 96  F6.1  mJy      e_Sp      Uncertainty on Sp
      99-106  F8.1  mJy      St        Total flux density at 843MHz
     108-113  F6.1  mJy      e_St      Uncertainty on St
     116-121  F6.1  arcsec   MajAxis   Fitted major axis
     123-127  F5.1  arcsec   MinAxis   Fitted minor axis
     129-133  F5.1  deg      PA        Fitted major axis position angle (N to E)
     136-141  F6.1  arcsec   dMajAxis  Fitted major axis after deconvolution (2)
     143-147  F5.1  arcsec   dMinAxis  Fitted minor axis after deconvolution (2)
     149-153  F5.1  deg      dPA       ? Fitted major axis position angle
                                         after deconvolution
     156-163  A8    ---      Mosaic    Mosaic in which the source appears (3)
         165  I1    ---      Nm        Number of mosaics with the source (4)
     167-172  F6.1  pix      Xpos      Position of the source on quoted mosaic (4)
     174-179  F6.1  pix      Ypos      Position of the source on quoted mosaic (4)

    Note (1): Positional uncertainties are calculated from the quadratic
         sum of the MOST calibration using Equations (1) and (2) of the paper.
    Note (2): If the fitted major axis size exceeds the beam size by more than
         2.33{sigma}({theta}M), the major axis size after deconvolution from
         the MOST beam is given in arcseconds.
    Note (3): The naming scheme for MGPS-2 mosaics is JHHMMMDD indicating the
         J2000 RA and Dec of the mosaic centre. The original mosaics are
         available online at http://www.astrop.physics.usyd.edu.au/mosaics
         In the case of duplicate matches the mosaic name quoted is that used
         for the fit which is chosen to be included in the catalogue.
    Note (4): When the source appears in  more than one image, the source
         parameters are those of the most reliable fit.

    Nomenclature Notes:
        MGPS-2 sources should be referred by their truncated position
        MGPS JHHMMSS-DDMMSS

    Acknowledgements:
        Tara Murphy, tara(at)physics.usyd.edu.au
    ================================================================================
    (End)                                        Patricia Vannier [CDS]  17-Aug-2007