{"paper":{"title":"The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. P. Mechev, B. Mingo, C. Tasse, D. J. B. Smith, D. J. Schwarz, D. Nisbet, G. G\\\"urkan, G. J. White, G. K. Miley, H. J. A. R\\\"ottgering, I. Prandoni, J. H. Croston, J. R. Callingham, J. Sabater, Kenneth J Duncan, K. T. Chy\\.zy, L. Alegre, L. Morabito, M. Hoeft, M. J. Hardcastle, M. J. Jarvis, P. N. Best, R. Cochrane, R. J. van Weeren, R. Kondapally, T. W. Shimwell, W. L. Williams","submitted_at":"2018-11-19T19:05:28Z","abstract_excerpt":"The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of radio continuum observations over the HETDEX Spring Field (10h45m00s $<$ right ascension $<$ 15h30m00s and 45$^\\circ$00$'$00$'$ $<$ declination $<$ 57$^\\circ$00$'$00$''$) with a median sensitivity of 71$\\mu$Jy/beam and a resolution of 6$''$. In this paper we present photometric redshifts (photo-$z$) for 94.4% of optical sources over this region that are detected in the Panoramic Survey Telescope and Rapid Response Syste"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07928","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}