MGPS2 ivo://nasa.heasarc/mgps2 NASA/GSFC HEASARC Murphy et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the Molonglo Galactic Plane Survey 2nd Epoch (MGPS-2) Compact Source Catalog. The MGPS-2 was carried out with the Molonglo Observatory Synthesis Telescope (MOST) at a frequency of 843 MHz and with a restoring beam of 45" x 45" cosec |(delta)|, where delta is the declination, making it the highest resolution large-scale radio survey of the southern Galactic plane to date. It covers the range |b| < 10 degrees and 245 < l < 365 degrees, where l and b are the Galactic longitude and latitude, and is the Galactic counterpart to the SUMSS (<a href="https://cdsarc.cds.unistra.fr/ftp/cats/VIII/81B">CDS Cat. VIII/81B</a>) Catalog which covers that portion of the southern sky with delta < -30 degrees, |b| > 10 degrees. 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. This HEASARC table was created in January 2008 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/382/382">CDS catalog J/MNRAS/382/382</a> file mgpscat.dat. This is a service provided by NASA HEASARC . 2007MNRAS.382..382M https://heasarc.gsfc.nasa.gov/W3Browse/all/mgps2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=mgps2& GET text/xml 180 99999 true 198.05708333 -72.80563889 0.05 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=mgps2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_mgps2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.05 Radio public mgps2 Molonglo Galactic Plane Survey 2nd Epoch Compact Source Catalog name Catalog Source Designation (MGPS JHHMMSS-DDMMSS) meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux_36_cm Peak Brightness at 843MHz (mJy/beam) mJy/beam phot.flux.density;em.radio.750-1500MHz double nullable flux_36_cm_error Uncertainty in Peak Brightness at 843MHz mJy/beam stat.error;phot.flux.density;em.radio.750-1500MHz double nullable int_flux_36_cm Total Flux Density at 843MHz (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable int_flux_36_cm_error Uncertainty in Total Flux Density at 843MHz mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable fit_minor_axis Fitted Minor Axis (arcsec) arcsec phys.angSize.sminAxis double nullable minor_axis Fitted Minor Axis After Deconvolution (arcsec) arcsec phys.angSize.sminAxis;meta.modelled double nullable mosaic_name Mosaic in Which the Source Appears meta.id;obs.image char nullable ra_error RMS Uncertainty in Right Ascension (arcsec) arcsec stat.error;pos.eq.ra;meta.main double nullable fit_position_angle Fitted Major Axis Position Angle (N to E) degree pos.posAng double nullable dec_error RMS Uncertainty in Declination (arcsec) arcsec stat.error;pos.eq.dec;meta.main double nullable x_pixel Position of the Source on Quoted Mosaic pixel pos.cartesian.x;instr.pixel double nullable major_axis Fitted Major Axis After Deconvolution (arcsec) arcsec phys.angSize.smajAxis;meta.modelled double nullable number_mosaics Number of Mosaics with the Source meta.number;obs.image short nullable position_angle Fitted Major Axis Position Angle After Deconvolution (degree) degree pos.posAng;meta.modelled double nullable bii Galactic Latitude degree pos.galactic.lat double nullable y_pixel Position of the Source on Quoted Mosaic pixel pos.cartesian.y;instr.pixel double nullable lii Galactic Longitude degree pos.galactic.lon double nullable fit_major_axis Fitted Major Axis (arcsec) arcsec phys.angSize.smajAxis double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable