MGPS2 - Molonglo Galactic Plane Survey 2nd Epoch Compact Source Catalog
This version of the catalog (15-Aug-2007) consists of 48850 compact sources, made by fitting elliptical Gaussians in the MGPS-2 mosaics to a limiting peak brightness of 10 mJy/beam. The authors used a custom method (described in the associated reference publication) to remove extended sources from the catalog. Positions in the catalog are accurate to 1" - 2". The authors have carried out an analysis of the compact source density across the Galactic plane and find that the source density is not statistically higher than the density expected from the extragalactic source density alone.
See http://www.astrop.physics.usyd.edu.au/mosaics for access to the MGPS-2 mosaic images.
The Molonglo Galactic Plane Survey (MGPS-2): Compact Source Catalogue Murphy, T., Mauch, T., Green, A., Hunstead, R. W., Piestrzynski, B., Kels, A.P., Sztajer, P. 2007, MNRAS, Volume 382, p. 382 (2007MNRAS.382..382M)
The MGPS-2 source designation (MGPS JHHMMSS-DDMMSS) provided by the authors, using the IAU-recommended position-based method.
The Right Ascension of the radio source in the selected equinox. This was given in J2000 coordinates to a precision of 0.01 seconds of time in the original table.
The Declination of the radio source in the selected equinox. This was given in J2000 coordinates to a precision of 0.1 arcseconds in the original table.
The Galactic Longitude of the radio source.
The Galactic Latitude of the radio source.
The uncertainty in the Right Ascension of the radio source, in arcseconds, calculated from the quadratic sum of the MOST Right Ascension calibration uncertainty and equation (1) of the reference paper.
The uncertainty in the Declination of the radio source, in arcseconds, calculated from the quadratic sum of the MOST Declination calibration uncertainty and equation (2) of the reference paper.
The 843 MHz (36 cm) peak brightness of the source, in units of mJy/beam, calculated as described in Section 5.3 of the reference paper.
The 1-sigma uncertainty in the radio source peak brightness at 843 MHz, in mJy/beam, calculated as described in Section 5.3 of the reference paper.
The total flux density of the radio source at 843 MHz, in mJy.
The uncertainty in the total flux density of the radio source at 843 MHz, in mJy, calculated from the equations described by Condon (1997, PASP, 109, 166).
The fitted size of the major axis of the radio source, in arcseconds.
The fitted size of the minor axis of the radio source, in arcseconds.
The fitted major axis position angle of the radio source, in degrees east of north. Most unresolved sources would have PA values close to 0 or 180 degrees, since the MOST elliptical beam has a position angle PA = 0 degrees.
The major axis of the source after deconvolution from the MOST beam, in arcseconds. This parameter is given if the fitted major axis size exceeds the beam size by more than 2.33 times the sigma of the fitted major axis size.
The minor axis of the source after deconvolution from the MOST beam, in arcseconds. If the major axis is resolved, the minor axis is subsequently checked using the same criterion, viz., this parameter is filled if the fitted minor axis size exceeds the beam size by more than 2.33 times the sigma of the fitted minor axis size, and the deconvolved size is given.
The deconvolved position angle of the source, in degrees east from north. This parameter is given if the major axis is resolved.
The name of the mosaic in which the radio source appears. The naming scheme for MGPS-2 mosaics is JHHMMMDD indicating the J2000 RA and Dec of the mosaic center, e.g., J0712M32. The original mosaics are available online at http://www.astrop.physics.usyd.edu.au/mosaics. In the case where a radio source appears in two mosaics (due to overlap), the mosaic name quoted is the one for which the fitted parameters are included in the catalog.
The number of mosaics in which the source appears. Sometimes a source can appear in multiple mosaics because of a small overlap region used to ensure all sources are properly imaged and not truncated. The source parameters which appear in the catalog are those for the most reliable fit.
The x-pixel position of the radio source in the quoted mosaic.
The y-pixel position of the radio source in the quoted mosaic.