Table information for 'lotss_dr3.mosaics'

General

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: 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.

For a list of all services and tables belonging to this table's resource, see Information on resource 'lotss_dr3/q'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference Shimwell et al. 2026 either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:lotss_dr3_mosaics,
  year=2026,
  title={Untitled Resource},
  author={Shimwell, T. W. and Hardcastle, M. J. and Tasse, C. and Drabent, A. and Botteon, A. and Williams, W. L. and Best, P.N. and Röttgering, H. J. A. and Brüggen, M. and Brunetti, G. and Callingham, J. R. and Chyży, K. T. and Conway, J. E. and De Gasperin, F. and Haverkorn, M. and Horellou, C. and Jackson, N. and Miley, G. K. and Morabito, L. K. and Morganti, R. and O'Sullivan, S. P. and Schwarz, D. J. and Smith, D. J. B. and van Weeren, R. J. and Vedantham, H. K. and White, G. J. and Ahmadi, A. and Alegre, L. and Arias, M. and Asabere, B. and Bahr-Kalus, B. and Barkus, B. and Bilicki, M. and Böhme, L. and Brentjens, M. and Brienza, M. and Bomans, D. J. and Bonafede, A. and Bonato, M. and Bonnassieux, E. and Boxelaar, J. M. and Camera, S. and Cassano, R. and Chilufya, J. and Cianfaglione, M. and Croston, J. H. and Cuciti, V. and Dabhade, P. and De Rubeis, E. and de Jong, J. M. G. H. J. and Dallacasa, D. and Dettmar, R. J. and Duncan, K. J. and Di Gennaro, G. and Edler, H. W. and Groeneveld, C. and Gürkan, G. and Hajduk, M. and Hale, C. L. and Heesen, V. and Hoang, D. N. and Hoeft, M. and Holties, H. and Horton, M. A. and Iacobelli, M. and Jamrozy, M. and Jarvis, M. J. and Jelic, V. and Kadler, M. and Kondapally, R. and Kunert-Bajraszewska, M. and Loose, M. and Magliocchetti, M. and Małek, K. and Manzano, C. and {McKean}, J. P. and Mevius, M. and Mingo, B. and Miskolczi, A. and Misra, A. and Moldón, J. and Nair, D.G. and Nakoneczny, S. J. and Orru, E. and Pashapour-Ahmadabadi, M. and Pasini, T. and Petley, J. and Pierce, J. C. S. and Prandoni, I. and Rafferty, D. and Rajpurohit, K. and Riseley, C.J. and Roberts, I. D. and Sethi, S. and Shulevski, A. and Stein, M. and Stuardi, C. and Sweijen, F. and ter Veen, S. and Timmerman, R. and Vaccari, M. and Wijnholds, S.},
  url={https://vo.astron.nl/tableinfo/lotss_dr3.mosaics},
  howpublished={{VO} resource provided by the The VO @ {ASTRON}}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
accref Product key Access key for the data N/A N/A
owner Owner Owner of the data N/A N/A
embargo Embargo ends Date the data will become/became public a N/A
mime Type MIME type of the file served N/A meta.code.mime
accsize File size Size of the data in bytes byte VOX:Image_FileSize
centerAlpha Ctr. RA Approximate center of image, RA deg POS_EQ_RA_MAIN
centerDelta Ctr. Dec Approximate center of image, Dec deg POS_EQ_DEC_MAIN
imageTitle Title Synthetic name of the image N/A VOX:Image_Title
instId Instrument Identifier of the originating instrument N/A INST_ID
dateObs Obs. date Epoch at midpoint of observation d VOX:Image_MJDateObs
nAxes #axes Number of axes in data N/A VOX:Image_Naxes
pixelSize Axes Lengths Number of pixels along each of the axes pix VOX:Image_Naxis
pixelScale Scales The pixel scale on each image axis deg/pix VOX:Image_Scale
refFrame Ref. Frame Coordinate system reference frame N/A VOX:STC_CoordRefFrame
wcs_equinox Equinox Equinox of the given coordinates yr VOX:STC_CoordEquinox
wcs_projection Proj. FITS WCS projection type N/A VOX:WCS_CoordProjection
wcs_refPixel Ref. pixel WCS reference pixel pix VOX:WCS_CoordRefPixel
wcs_refValues Ref. values World coordinates at WCS reference pixel deg VOX:WCS_CoordRefValue
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pix VOX:WCS_CDMatrix
bandpassId Bandpass Freeform name of the bandpass used N/A VOX:BandPass_ID
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A VOX:BandPass_Unit
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m VOX:BandPass_RefValue
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_HiLimit
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_LoLimit
pixflags P. Flags Flags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display only N/A VOX:Image_PixFlags
coverage Coverage Field covered by the image deg N/A
mosaic_id Mosaic ID The name of the mosaic. N/A meta.id;meta.main
related_products Related products Link related products for the observation N/A meta.ref.url
lofar_obsids LOFAR ObsID(s) ObsID(s) of the LOFAR observation(s) used for imaging the central pointing. N/A meta.id;obs
record_id Record ID Surf Data Repository record ID. N/A meta.bib
md5 md5 checksum md5 checksum of the file N/A meta.fits;meta.number
dateFirstObs Date first obs. Epoch of first observation d time.epoch;time.start
dateLastObs Date last obs. Epoch of last observation d time.epoch;time.end
dateAllObs Date all obs. Epoch of all observations N/A time.epoch

Columns that are parts of indices are marked like this.

Other

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VOResource

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Copyright and such:

LoTSS Data Release 3 is licensed under the Creative Commons Attribution Share-Alike 3.0 License

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