{"paper":{"title":"Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Gangopadhyay, A. M. Tatarnikov, A. Pastorello, A. Reguitti, A. V. Filippenko, C.-C. Lin, C. McCully, C. P. Guti\\'errez, D. A. Howell, D. Hiramatsu, D. V. Oparin, E. A. Barsukova, E. A. Magnier, E. A. Malygin, E. Cappellaro, E. Kankare, E. Padilla Gonzalez, G. Terreran, G. Valerin, H. F. Stevance, H. Gao, H. Lin, H.-W. Ge, I. Salmaso, J. Burke, J.-J. Zhang, J. Mo, K. C. Chambers, K. C. Patra, K. E. Atapin, K. Matilainen, K. Misra, K. W. Smith, L. Galbany, L. Tartaglia, L. Xiao, M. D. Stritzinger, M. E. Huber, M. Fraser, M. Fulton, M. Newsome, N. A. Maslennikova, N. Elias-Rosa, N. Emami, N. I. Shatsky, O. V. Vozyakova, P. A. Mazzali, P. J. Vallely, P. L. Kelly, P. Lundqvist, R. Byrne, R. Dastidar, R. I. Uklein, R. Kotak, R. Wainscoat, S. Benetti, S. Bose, S. G. Zheltoukhov, S. J. Smartt, S. Moran, S.-Y. Yan, T. G. Brink, T. J. L. de Boer, T. Kravtsov, T. M. Reynolds, T.-M. Zhang, V. P. Goranskij, V. Yu. Lander, W.-L. Chen, W. Zheng, X.-F. Wang, X.-H. Zhang, Y. Yang, Y.-Z. Cai, Z.-T. Li, Z.-W. Ou","submitted_at":"2022-07-02T04:21:22Z","abstract_excerpt":"We present an observational study of the luminous red nova (LRN) AT\\,2021biy in the nearby galaxy NGC\\,4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from $\\sim 231$\\,days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT\\,2021biy shows a short-duration blue peak, with a bolometric luminosity of $\\sim 1.6 \\times 10^{41}$\\,erg\\,s$^{-1}$, followed by the longest plateau among LRNe to date, with a duration of 2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.00734","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2207.00734/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}