ivo://astron.nl/apertif_lockman/q/source_catalogASTRONApertif Team2025-02-24T08:51:26Michael Sipior

Oude Hoogeveensedijk 4, 7991PD Dwingeloo, the Netherlands

vo@astron.nlastronomical databases — surveys — catalogs — radioApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/https://vo.astron.nl/tableinfo/apertif_lockman.source_catalogSurvey Images and CatalogsResearchWSRTApertifRadioapertif_lockmanApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/apertif_lockman.source_catalogApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/namemeta.id;meta.maincharnullablerathe right ascension of the source (for the equinox of the image)degpos.eq.ra;meta.mainfloatindexednullablee_rathe error on the right ascension of the sourcedegpos.eq.ra;stat.errorfloatnullabledecthe declination of the source (for the equinox of the image)degpos.eq.dec;meta.mainfloatindexednullablee_decthe 1-sigma error on the declination of the sourcedegpos.eq.dec;stat.errorfloatnullabletotal_fluxthe total, integrated Stokes I flux density of the source at the reference frequencymJyfloatnullablee_total_fluxthe 1-sigma error on the total flux density of the sourcemJyfloatnullablepeak_fluxthe peak Stokes I flux density per beam of the sourcemJy/beamfloatnullablee_peak_fluxthe 1-sigma error on the peak flux density per beam of the sourcemJy/beamfloatnullableisl_rmsthe average background rms value of the islandmJy/beamfloatnullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.codecharnullable