GMRTLHCAT2 ivo://nasa.heasarc/gmrtlhcat2 NASA/GSFC HEASARC Garn et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains a source catalog based on further observations of the Lockman Hole field, made with the Giant Metrewave Radio Telescope at 610 MHz with an angular resolution of 6 x 5 arcsec<sup>2</sup>. These complement this group's earlier observations of the central ~ 5 deg<sup>2</sup> of the Lockman Hole (Garn et al. 2008, MNRAS, 387, 1037, the HEASARC Browse table GMRTLHCAT) by covering a further ~ 8 deg<sup>2</sup> area, with an rms noise down to ~ 80 microJansky/beam (µJy/beam). A catalog of 4934 radio sources in both the inner and outer regions of the Lockman Hole is presented in this table. The earlier survey had 12 pointings covering ~ 5 square degrees in the center of the Lockman Hole, and herein a further 26 pointings in the outer parts of the Lockman Hole are added, to cover a total of ~ 14 square degrees. To match the earlier survey, the images were made with a resolution of 6" x 5", at a position angle of +45 degrees. The majority of the new pointings have an rms noise of ~80 µJy/beam before the primary beam correction, but the noise in the west - particularly near the very bright source 3C244.1 - is worse. This table was created by the HEASARC in February 2012 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/BASI/38.103">CDS Catalog J/BASI/38.103</a> file gmrtlh2.cat. This is a service provided by NASA HEASARC . 2010BASI...38..103G https://heasarc.gsfc.nasa.gov/W3Browse/all/gmrtlhcat2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=gmrtlhcat2& GET text/xml 180 99999 true 161.67995833 55.58638889 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=gmrtlhcat2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_gmrtlhcat2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public gmrtlhcat2 Giant Metrewave Radio Telescope Lockman Hole 610-MHz Radio Sourc name IAU Designation of Source (GMRTLH JHHMMSS.s+DDMMSS) meta.id;meta.main char nullable ra Centroid Right Ascension degree pos.eq.ra;meta.main double nullable dec Centroid Declination degree pos.eq.dec;meta.main double nullable flux_610_mhz Peak Pixel Brightness (in mJy/beam) mJy/beam phot.flux.density;em.radio.400-750MHz double nullable rms_610_mhz Local RMS Noise (in mJy/beam) mJy/beam stat.error;phot.flux.density;em.radio.400-750MHz double nullable int_flux_610_mhz Integrated Flux at 610MHz mJy phot.flux.density;em.radio.400-750MHz double nullable int_flux_610_mhz_error Error for Integrated Flux mJy stat.error;phot.flux.density;em.radio.400-750MHz double nullable sextractor_db_flag Source Extractor Flag [0123] meta.code.qual short nullable bii Centroid Galactic Latitude degree pos.galactic.lat double nullable lii Centroid Galactic Longitude degree pos.galactic.lon double nullable centroid_y_pixel Centroid Y Pixel Location (Nearest Pixel) pos.cartesian.y;instr.pixel int nullable centroid_x_pixel Centroid X Pixel Location (Nearest Pixel) pos.cartesian.x;instr.pixel int 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