LoTSS-DR3 Gausivo://astron.nl/lotss_dr3/q/gaus_coneASTRONShimwell, T. W.Hardcastle, M. J.Tasse, C.Drabent, A.Botteon, A.Williams, W. L.Best, P.N.Röttgering, H. J. A.Brüggen, M.Brunetti, G.Callingham, J. R.Chyży, K. T.Conway, J. E.De Gasperin, F.Haverkorn, M.Horellou, C.Jackson, N.Miley, G. K.Morabito, L. K.Morganti, R.O'Sullivan, S. P.Schwarz, D. J.Smith, D. J. B.van Weeren, R. J.Vedantham, H. K.White, G. J.Ahmadi, A.Alegre, L.Arias, M.Asabere, B.Bahr-Kalus, B.Barkus, B.Bilicki, M.Böhme, L.Brentjens, M.Brienza, M.Bomans, D. J.Bonafede, A.Bonato, M.Bonnassieux, E.Boxelaar, J. M.Camera, S.Cassano, R.Chilufya, J.Cianfaglione, M.Croston, J. H.Cuciti, V.Dabhade, P.De Rubeis, E.de Jong, J. M. G. H. J.Dallacasa, D.Dettmar, R. J.Duncan, K. J.Di Gennaro, G.Edler, H. W.Groeneveld, C.Gürkan, G.Hajduk, M.Hale, C. L.Heesen, V.Hoang, D. N.Hoeft, M.Holties, H.Horton, M. A.Iacobelli, M.Jamrozy, M.Jarvis, M. J.Jelic, V.Kadler, M.Kondapally, R.Kunert-Bajraszewska, M.Loose, M.Magliocchetti, M.Małek, K.Manzano, C.McKean, J. P.Mevius, M.Mingo, B.Miskolczi, A.Misra, A.Moldón, J.Nair, D.G.Nakoneczny, S. J.Orru, E.Pashapour-Ahmadabadi, M.Pasini, T.Petley, J.Pierce, J. C. S.Prandoni, I.Rafferty, D.Rajpurohit, K.Riseley, C.J.Roberts, I. D.Sethi, S.Shulevski, A.Stein, M.Stuardi, C.Sweijen, F.ter Veen, S.Timmerman, R.Vaccari, M.Wijnholds, S.https://repository.surfsara.nl/api/objects/collection/lotss-dr3/thumbnail2026-02-22T22:56:09Michael Sipior

Oude Hoogeveensedijk 4, 7991PD Dwingeloo, the Netherlands

vo@astron.nlradio continuum: general, techniques: image processing In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution. This service queries the Stokes I continuum mosaic gaussian component catalogue.Shimwell et al. 2026https://vo.astron.nl/lotss_dr3/q/gaus_cone/infoSurveyResearchserved-byThe VO @ ASTRON TAP serviceLicensed under CC-BY-SAhttps://vo.astron.nl/lotss_dr3/q/gaus_cone/scs.xml?GETapplication/x-votable+xmlRARight Ascension (ICRS decimal)degpos.eq.rarealDECDeclination (ICRS decimal)degpos.eq.decrealSRSearch radiusdegrealRESPONSEFORMATFile format requested for output.meta.code.mimecharMAXRECMaximum number of records returned. Pass 0 to retrieve service parameters.integerVERBExhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.integer180100000true150.045.00.001https://vo.astron.nl/lotss_dr3/q/gaus_cone/availabilityhttps://vo.astron.nl/lotss_dr3/q/gaus_cone/capabilitieshttps://vo.astron.nl/lotss_dr3/q/gaus_cone/tableMetadatahttps://vo.astron.nl/tapLOFARLOFAR.HBA6/660,664,670,676,680,686,690,703,712,719,723,735,739,750,755,899,914,932,936,940,945,958,2050,2063,2067,2078,2083,2094,2098,2109,2114,2125,2129,2142,2145,2158,2162,2167,2178,2189,2193,2199,2203,2209,2215,2219,2236,2252,2257,2268,2272,2284,2288,2293,2298,2306,2311,2315,2325,2331,2343,2346,2358,2378,2405,2408,2437,2441,2447,2452,2467,2571,2576,2581,2587,2599,2602,2617,2623,2630,2634,2645,2648,2662,2693,2696,2707,2724,2728,4853,4857,4863,4948,4952,4959,4964,4970,4978,4989,4995,5007,5014,5027,5044,5048,5054,5060,5064,5069,5073,5085,5091,5100,5105,5115,5203,5221,5225,5236,5240,5245,5269,5272,5279,5284,5288,5295,5299,5310,5313,5327,5331,5341,5346,5357,5361,5372,5380,5384,5396,5400,5406,5409,5419,5426,5435,5442,5452,5457,5468,5472,5477,5481,5495,5498,5511,5527,5530,5537,5548,5558,5560,5577,5583,5587,5597,5608,5614,5618,5628,5635,5650,5662,5668,5682,5687,5691,5698,5707,5712,5717,5723,5734,5747,5758,5761,5772,5785,5792,5797,5802,5807,5814,5823-5824,5829,5832,5848,5854,5857,5874,5879,5883,5894,5898,5903,5907,5917,5923,5933,5937,5948,5959,5963,5974,5978,5996,6005,6009,6016,6028,6032,6037,6041,6055,6058,6063,6070,6079,6085,6090,6100,6106,6115,6125,6129,6139,6197,6200,6207,6213,6217,6223,6227,6237,6243,6255,6259,6339,6349,6353,6365,6369,6384,6391,6395,6401,6414,6418,6430,6434,6439,6460,6466,6471,6475,6486,6501,6505,6516,6520,6529,6537,6544,6550,6554,6595,6607,6609,6615,6641,6647,7177,7186,7197,7204,7208,7214,7216,7228,7233,7239,7254,7264,7269,7273,7285,7288,7303,7307,7317,7322,7334,7347,7358,7366,7370,7375,7377,7389,7395,7407,7409,7419,7433,7443,7454,7460,7464,7474,7484,7491,7501,7511,7521,7532,7537,7556,7566,7568,7580,7586,7591,7595,7616,7680,7685,7746,7757,7767,7770,9046,9050,9062,9066,9078,9082,9107,9119,9125,9129,9135,9139,9158,9172,9176,9188,9192,9197,9204,9212,9301,9305,9317,9321,9331,9367,9370,9382,9386,9397,9401,9413,9417,9428,9432,9444,9450,9460,9464,9469,9478,9482,9487,9491,9501,9513,9519,9523,9533,9540,9549,9559,9569,9580,9584,9589,9595,9602,9614,9618,9623,9627,9645,9657,9670,9674,9732,9736,9743,9747,9757,9763,9774,9779,9790,9793,9804,9809,9820,9826,9831,9835,9846,9850,9855,9858,9869,9884,9889,9899,9904,9909,9914,9929,9939,9957,9960,9967,9969,9981,9984,9989,9995,10020,10034,10116,10120,10123,10130,10139,10151,10167,10170,10216,10261,10265,10277,10281,10293,10297,10313,10325,10329,10341,10345,10357,10360,10367,10373,10377,10388,10392,10404,10410,10420,10426,10436,10440,10450,10468,10472,10477,10481,10491,10505,10511,10513,10527,10531,10542,10546,10551,10561,10574,10578,10583,10604,10608,10613,10617,10632,10636,10641,10645,10651,10658,10662,10678,10682,10687,10692,10698,10708,10712,10719,10724,10734,10738,10748,10758,10765,10772,10782,10787,10798,10802,10812,10817,10823,10841,10849,10855,10858,10870,10879,10891,10898,10908,10917,10923,10934,10943,10955,10960,10963,10974,10980,10989,11003,11008,11017,11027,11038,11044,11053,11063,11074,11083,11090,11097,11111,11115,11125,11129,11139,11148,11152,11158,11170,11177,11184,11187,11199,11206,11210,11221,11224,11231,11236,11246,11250,11262,11270,11279,11284,11294,11299,11320,11323,11330,11340,11345,11356,11362,11371,11376,11385,11393,11405,11415,11419,11425,11436,11446,11450,11461,11466,11477,11481,11487,11492,11496,11502,11507,11518,11520,11526,11542,11546,11552,11555,11572,11576,11581,11587,11620,11630,11634,11652,11663,11665,11671,11682,11693,11697,11776,11785,11791,11798,11811,11821,11828,11837,11848,11858,11868,11873,11883,11890,11905,11918,11921,11927,11938,11948,11953,12032,12621,12625,12638,12641,12652,12656,12668,12759,13314,13324,13328,13335,13339,13344,13351,13355,13367,13371,13387,13394,13406,13415,13419,13433,13447,13451,13463,13467,13479,13495,13499,13509,13515,13526,13530,13545,13570,13580,13584,13589,13593,13600,13607,13610,13845,14888,14895,14979,14989,14993,14999,15003,15010,15020,15030,15045,15050,19453,19710,19774,19790,19796,19800,19806,19810,19822,19826,19839,19854,19858,19870,19874,19886,19890,19903,19906,19919,19923,19934,19939,19950,19954,19965,20030,20046,20050,20062,20066,20078,20082,20095,20110,20114,20126,20129,20142,20146,20156,20162,20172,20177,20187,20192,20199,20203,20222,20226,20239,20243,20254,20259,20270,20274,20286,20290,20300,20304,20317,20320,20332,20337,20343,20347,20354,20366,20370,20380,20386,20396,20400,20406,20416,20423,20427,20438,20457,20464,20470,28117,28121,28149,28415,28502,28506,28511,28518,28522,28527,28531,28543,28559,28563,28579,28597,28600,28611,28622,28627,28637,28642,28653,28657,28663,32598,32602,32614,32629,32633,32668,32677,32681,32694,32698,32703-32704,32709,32712,32724,32728,32734,32742,32760,3276656800.6 58884.81.78448 2.49827https://vo.astron.nl/lotss_dr3/q/gaus_cone/coverageRadiolotss_dr3 In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.lotss_dr3.main_gausses In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoubletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma error on the total flux density of the sourcemJystat.error;phot.flux.density;em.radiodoublenullablepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamphot.flux.density;em.radiodoublenullablee_peak_fluxThe 1-sigma error on the peak flux density per beam of the sourcemJy/beamstat.error;phot.flux.density;em.radiodoublenullablemajaxThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_majThe 1-sigma error on the FWHM of the major axis of the sourcearcsecstat.error;phys.angsizedoublenullableminaxThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_minThe 1-sigma error on the FWHM of the minor axis of the sourcearcsecstat.error;phys.angsizedoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_paThe 1-sigma error on the position angle of the major axis of the sourcedegstat.error;pos.posangdoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_majThe 1-sigma error on the FWHM of the deconvolved major axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_dc_paThe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegstat.error;pos.posangdoublenullableisl_total_fluxThe total, integrated Stokes I flux density of the islandmJyphot.flux.density;em.radiodoublenullablee_isl_total_fluxThe 1-sigma error on the integrated Stokes I flux density of the islandmJystat.error;phot.flux.density;em.radiodoublenullableisl_rmsThe average background rms value of the islandmJy/beaminstr.det.noisedoublenullables_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.code;src.morphcharnullablehealpixThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullableresolutionThe angular resolution of the mosaic imagearcsecpos.angResolution;phys.angSizedoublenullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablegaus_idID of the fitted Gaussian.meta.idintwave_idWavelet scale from which the source was extractedmeta.idintxposnX image coordinate of the sourcepixpos.cartesian.xdoublee_xposnError in X image coordinate of the sourcepixstat.error;pos.cartesian.xdoubleyposnY image coordinate of the sourcepixpos.cartesian.ydoublee_yposnError in Y image coordinate of the sourcepixstat.error;pos.cartesian.ydoublewave_isl_rmsThe average background rms value of the island in the waveletJy/beaminstr.background;stat.rmsdoublewave_isl_meanThe average background mean value of the islandJy/beaminstr.background;stat.meandouble