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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00010227naa a2201141 4500
001oai:research.chalmers.se:e47a8bff-1cc8-4cb5-89dd-c8f18a93c5f4
003SwePub
008221125s2022 | |||||||||||000 ||eng|
0247 a https://research.chalmers.se/publication/5333522 URI
0247 a https://doi.org/10.1051/0004-6361/2022440072 DOI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Adams, E. A. K.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
2451 0a First release of Apertif imaging survey data
264 c 2022-11-04
264 1b EDP Sciences,c 2022
338 a electronic2 rdacarrier
520 a Context. Apertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope, providing forty instantaneous beams over 300 MHz of bandwidth. A dedicated survey program utilizing this upgrade started on 1 July 2019, with the last observations taken on 28 February 2022. The imaging survey component provides radio continuum, polarization, and spectral line data. Aims. Public release of data is critical for maximizing the legacy of a survey. Toward that end, we describe the release of data products from the first year of survey operations, through 30 June 2020. In particular, we focus on defining quality control metrics for the processed data products. Methods. The Apertif imaging pipeline, Apercal, automatically produces non-primary beam corrected continuum images, polarization images and cubes, and uncleaned spectral line and dirty beam cubes for each beam of an Apertif imaging observation. For this release, processed data products are considered on a beam-by-beam basis within an observation. We validate the continuum images by using metrics that identify deviations from Gaussian noise in the residual images. If the continuum image passes validation, we release all processed data products for a given beam. We apply further validation to the polarization and line data products and provide flags indicating the quality of those data products. Results. We release all raw observational data from the first year of survey observations, for a total of 221 observations of 160 independent target fields, covering approximately one thousand square degrees of sky. Images and cubes are released on a per beam basis, and 3374 beams (of 7640 considered) are released. The median noise in the continuum images is 41.4 uJy beam(-1), with a slightly lower median noise of 36.9 uJy beam(-1) in the Stokes V polarization image. The median angular resolution is 11.6 ''/sin delta. The median noise for all line cubes, with a spectral resolution of 36.6 kHz, is 1.6 mJy beam(-1), corresponding to a 3-sigma H i column density sensitivity of 1.8 x 10(20) atoms cm(-2) over 20 km s(-1) (for a median angular resolution of 24 '' x 15 ''). Line cubes at lower frequency have slightly higher noise values, consistent with the global RFI environment and overall Apertif system performance. We also provide primary beam images for each individual Apertif compound beam. The data are made accessible using a Virtual Observatory interface and can be queried using a variety of standard tools.
650 7a TEKNIK OCH TEKNOLOGIERx Naturresursteknikx Fjärranalysteknik0 (SwePub)207032 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Environmental Engineeringx Remote Sensing0 (SwePub)207032 hsv//eng
650 7a NATURVETENSKAPx Data- och informationsvetenskapx Datorseende och robotik0 (SwePub)102072 hsv//swe
650 7a NATURAL SCIENCESx Computer and Information Sciencesx Computer Vision and Robotics0 (SwePub)102072 hsv//eng
650 7a TEKNIK OCH TEKNOLOGIERx Medicinteknikx Medicinsk bildbehandling0 (SwePub)206032 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Medical Engineeringx Medical Image Processing0 (SwePub)206032 hsv//eng
653 a radio lines
653 a galaxies
653 a galaxies
653 a surveys
653 a radio continuum
653 a ISM
653 a polarization
653 a galaxies
7001 a Adebahr, B.u Ruhr-Universität Bochum4 aut
7001 a de Blok, W. J. G.u Netherlands Institute for Radio Astronomy (ASTRON),University of Cape Town4 aut
7001 a Denes, H.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Hess, K. M.u Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA),Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a van der Hulst, J. M.4 aut
7001 a Kutkin, A.u Russian Academy of Sciences,Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Lucero, D. M.u Virginia Polytechnic Institute and State University (Virginia Tech)4 aut
7001 a Morganti, R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Moss, V. A.u Commonwealth Scientific and Industrial Research Organisation (CSIRO),Netherlands Institute for Radio Astronomy (ASTRON),The University of Sydney4 aut
7001 a Oosterloo, T. A.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Orru, E.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Schulz, R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a van Amesfoort, A. S.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Berger, A.u Ruhr-Universität Bochum4 aut
7001 a Boersma, O. M.u Universiteit Van Amsterdam,University of Amsterdam4 aut
7001 a Bouwhuis, M.u National Institute for Subatomic Physics (NIKHEF)4 aut
7001 a van den Brink, R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a van Cappellen, W. A.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Connor, L.u Universiteit Van Amsterdam,University of Amsterdam,California Institute of Technology (Caltech)4 aut
7001 a Coolen, A. H. W. M.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Damstra, S.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a van Diepen, G. N. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Dijkema, T. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Ebbendorf, N.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Grange, Y. G.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a de Goei, R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Gunst, A. W.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Holties, H. A.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Hut, B.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Ivashina, Marianna,d 1975u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)ivashina
7001 a Jozsa, G. I. G.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Rhodes University4 aut
7001 a van Leeuwen, J.u Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Van Amsterdam,University of Amsterdam4 aut
7001 a Loose, G. M.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Maan, Y.u Tata Institute of Fundamental Research,Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Mancini, M.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Mika, A.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Mulder, H.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Norden, M. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Offringa, A. R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Oostrum, L. C.u Universiteit Van Amsterdam,University of Amsterdam,Netherlands Institute for Radio Astronomy (ASTRON),Netherlands eScience Center4 aut
7001 a Pastor-Marazuela, Iu Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Van Amsterdam,University of Amsterdam4 aut
7001 a Pisano, D. J.u West Virginia University,University of Cape Town4 aut
7001 a Ponomareva, A. A.u University Of Oxford4 aut
7001 a Romein, J. W.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Ruiter, M.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Schoenmakers, A. P.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a van der Schuur, D.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Sluman, J. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Smits, R.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Stuurwold, K. J. C.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Verstappen, J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Vilchez, N. P. E.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Vohl, D.u Universiteit Van Amsterdam,University of Amsterdam,Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Wierenga, K. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Wijnholds, S. J.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Woestenburg, E. E. M.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Zanting, A. W.u Netherlands Institute for Radio Astronomy (ASTRON)4 aut
7001 a Ziemke, J.u Netherlands Institute for Radio Astronomy (ASTRON),Universitetet i Oslo,University of Oslo4 aut
7102 a Netherlands Institute for Radio Astronomy (ASTRON)b Ruhr-Universität Bochum4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 667q 667x 0004-6361x 1432-0746
8564 u https://research.chalmers.se/publication/533352/file/533352_Fulltext.pdfx primaryx freey FULLTEXT
8564 8u https://research.chalmers.se/publication/533352
8564 8u https://doi.org/10.1051/0004-6361/202244007

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