LoTSS-DR2 Sourceivo://astron.nl/lotss_dr2/q/src_coneASTRONShimwell, T. W.Hardcastle, M. J.Tasse, C.Best, P. N.Röttgering, H. J. A.Williams, W. L.Botteon, A.Drabent, A.Mechev, A.Shulevski, A.van Weeren, R. J.Bester, L.Brüggen, M.Brunetti, G.Callingham, J. R.Chyży, K.T.Conway, J. E.Dijkema, T. J.Duncan, K.de Gasperin, F.Hale, C. L.Haverkorn, M.Hugo, B.Jackson, N.Mevius, M.Miley, G. K.Morabito, L. K.Morganti, R.Offringa, A.Oonk, J. B. R.Rafferty, D.Sabater, J.Smith, D. J. B.Schwarz, D. J.Smirnov, O.O’Sullivan, S. P.Vedantham, H.White, G. J.Albert, J. G.Alegre, L.Asabere, B.Bacon, D. J.Bonafede, A.Bonnassieux, E.Brienza, M.Bilicki, M.Bonato, M.Calistro Rivera, G.Cassano, R.Cochrane, R.Croston, J. H.Cuciti, V.Dallacasa, D.Danezi, A.Dettmar, R. J.Di Gennaro, G.Edler, H. W.Enßlin, T. A.Emig, K. L.Franzen, T. M. O.Garc\’ia-Vergara, C.Grange, Y. G.Gürkan, G.Hajduk, M.Heald, G.Heesen, V.Hoang, D. N.Hoeft, M.Horellou, C.Iacobelli, M.Jamrozy, M.Jelić, V.Kondapally, R.Kukreti, P.Kunert-Bajraszewska, M.Magliocchetti, M.Mahatma, V.Małek, K.Mandal, S.Massaro, F.Meyer-Zhao, Z.Mingo, B.Mostert, R. I. J.Nair, D. G.Nakoneczny, S. J.Nikiel-Wroczyński, B.Orrú, E.Pajdosz-Śmierciak, U.Pasini, T.Prandoni, I.van Piggelen, H. E.Rajpurohit, K.Retana-Montenegro, E.Riseley, C. J.Rowlinson, A.Saxena, A.Schrijvers, C.Sweijen, F.Siewert, T. M.Timmerman, R.Vaccari, M.Vink, J.West, J. L.Wołowska, A.Zhang, X.Zheng, J.https://repository.surfsara.nl/api/objects/collection/lotss-dr2/thumbnail2024-05-30T10:56:59Michael Sipior

Oude Hoogeveensedijk 4, 7991PD Dwingeloo, the Netherlands

vo@astron.nlradio continuum: general, techniques: image processing In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset. This service queries the Stokes I continuum mosaic source catalogue.2022A&A...659A...1Shttps://vo.astron.nl/lotss_dr2/q/src_cone/infoSurveyResearchserved-byThe VO @ ASTRON TAP serviceLicensed under CC-BY-SAhttps://vo.astron.nl/lotss_dr2/q/src_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_dr2/q/src_cone/availabilityhttps://vo.astron.nl/lotss_dr2/q/src_cone/capabilitieshttps://vo.astron.nl/lotss_dr2/q/src_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 58884.87.95129e-26 1.1132e-25https://vo.astron.nl/lotss_dr2/q/src_cone/coverageRadiolotss_dr2 In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.lotss_dr2.main_sources In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.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.decdoublepeak_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.radiodoublenullabletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma on the total flux density of the sourcemJystat.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.angsizedoublenullabledc_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.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_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_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.morphcharnullablemosaic_idThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablenumber_pointingsNumber of pointings that are mosaiced at the position of the source.meta.numberintmasked_fractionThe fraction of the source that is in the CLEAN maskdoublenullable