The LOFAR Two-metre Sky Survey

Shimwell, T. W.; Hardcastle, M. J.; Tasse, C.; Best, P. N.; Röttgering, H. J. A.; Williams, W. L.; Botteon, A.; Drabent, A.; Mechev, A. P.; Shulevski, A.; Weeren, R. J. van; Bester, Hertzog L.; Brüggen, M.; Brunetti, G.; Callingham, J. R.; Chyży, K. T.; Conway, J. E.; Dijkema, Tammo Jan; Duncan, K. J.; Gasperin, F. de; Hale, Catherine; Haverkorn, M.; Hugo, B.; Jackson, N.; Mevius, M.; Miley, G. K.; Morabito, L. K.; Morganti, R.; Offringa, A. R.; Oonk, J. B. R.; Rafferty, D. A.; Sabater, J.; Smith, D. J. B.; Schwarz, Dominik J.; Smirnov, O.; O’Sullivan, S. P.; Vedantham, H. K.; White, G. J.; Albert, Joshua G.; Alegre, L.; Asabere, Bernard Duah; Bacon, David; Bonafede, A.; Bonnassieux, E.; Brienza, M.; Bilicki, Maciej; Bonato, Matteo; Rivera, G. Calistro; Cassano, R.; Cochrane, R. K.; Croston, J. H.; Cuciti, V.; Dallacasa, D.; Danezi, A.; Dettmar, R.‐J.; Gennaro, G. Di; Edler, H. W.; Enßlin, T. A.; Emig, K. L.; Franzen, T. M. O.; García-Vergara, Cristina; Grange, Y. G.; Gürkan, G.; Hajduk, M.; Heald, G.; Heesen, V.; Hoang, D. N.; Hoeft, M.; Horellou, C.; Iacobelli, M.; Jamrozy, M.; Jelić, Vibor; Kondapally, R.; Kukreti, Pranav; Kunert‐Bajraszewska, M.; Magliocchetti, M.; Mahatma, V. H.; Małek, K.; Mandal, S.; Massaro, F.; Meyer-Zhao, Zheng; Mingo, B.; Mostert, R. I. J.; Nair, Dhanya G.; Nakoneczny, Szymon J.; Nikiel-Wroczyński, B.; Orrú, E.; Pajdosz-Śmierciak, Urszula; Pasini, T.; Prandoni, I.; Piggelen, H. E. van; Rajpurohit, K.; Retana-Montenegro, E.; Riseley, C. J.; Rowlinson, A.; Saxena, Aayush; Schrijvers, C.; Sweijen, Frits; Siewert, Thilo M.; Timmerman, R.; Vaccari, M.; Vink, Jacco; West, Jennifer; Wołowska, Aleksandra; Zhang, Xiaoyuan; Zheng, Jian

doi:10.1051/0004-6361/202142484

articleAstronomy and AstrophysicsJan 3, 2022DIAMOND OA

The LOFAR Two-metre Sky Survey

TWT. W. Shimwell MJM. J. Hardcastle CTC. Tasse PNP. N. Best HJH. J. A. Röttgering

Leiden University · Netherlands Institute for Radio Astronomy · +55 more institutions

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Abstract

In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey 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 3451 h (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 4 396 228 radio sources is derived from our total intensity (Stokes I ) maps, where the majority of these have never been detected at…

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Topics & keywords

Topics

Keywords

LOFAR
Physics
Spectral index
Sky
Optics
Sky brightness
Brightness
Remote sensing

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