{"paper":{"title":"Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. J. Castro-Tirado, A. K. Ror, A. Krylov, A. Moskvitin, A. Pozanenko, A. Tatarnikov, A. Tursynkan, A. Volnova, A. Volvach, B. Grossan, D. Berdikhan, E. Abdikamalov, E. Klunko, G. C. Anupama, K. Baigarin, L. Elenin, L. Volvach, M. Krugov, M. Zheltobryukhov, N. Pankov, O. A. Burkhonov, P. Beniamini, P. Minaev, R. Gill, R. Gupta, R. Inasaridze, R. S\\'anchez-Ram\\'irez, S.A. Ehgamberdiev, S. Antier, S. Barway, S. Belkin, S. B. Pandey, S. Zheltoukhov, T. Komesh, V. Bhalerao, V. Rumyantsev, V. Swain, Z. Abdullayev, Z. Maksut","submitted_at":"2026-06-03T08:24:51Z","abstract_excerpt":"We present a multi-wavelength analysis of the long-duration gamma-ray burst GRB 230328B. Fermi/GBM observations reveal a typical Type II burst with a duration of about 22 s. Using a photometric redshift of about 1.5 derived from the host galaxy, we find that the burst energetics, with an isotropic-equivalent energy of about 6.4*10^52 erg, are consistent with established empirical correlations for long gamma-ray bursts. The optical, X-ray, and radio afterglow exhibits a complex temporal evolution, featuring an early onset bump followed by a pronounced late-time achromatic rebrightening at about"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04585","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.04585/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"}