{"paper":{"title":"Extensive Spectroscopy and Photometry of the Type IIP Supernova 2013ej","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Ordasi, A. Pal, A. P. Nagy, A. Szing, A. V. Filippenko, B. I. Biro, C. A. Gibson, C. Akerlof, E. Szegedi-Elek, F. V. Ferrante, G. Dhungana, G. H. Marion, G. Marschalko, I. Shivvers, J. C. Wheeler, J. Kelemen, J. M. Silverman, J. Vinko, K. I. Clubb, K. Sarneczky, K. Tak\\'ats, K. Vida, L. Moln\\'ar, M. L. Graham, O. D. Fox, P. Kelly, P. Sz\\'ekely, R. Kehoe, R. Szakats, S. B. Cenko, T. Borkovits, T. Hegedus, T. Szalai, W. H. Lee, W. Zheng","submitted_at":"2015-09-05T17:38:04Z","abstract_excerpt":"We present extensive optical ($UBVRI$, $g'r'i'z'$, and open CCD) and near-infrared ($ZYJH$) photometry for the very nearby Type IIP SN ~2013ej extending from +1 to +461 days after shock breakout, estimated to be MJD $56496.9\\pm0.3$. Substantial time series ultraviolet and optical spectroscopy obtained from +8 to +135 days are also presented. Considering well-observed SNe IIP from the literature, we derive $UBVRIJHK$ bolometric calibrations from $UBVRI$ and unfiltered measurements that potentially reach 2\\% precision with a $B-V$ color-dependent correction. We observe moderately strong Si II $\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.01721","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":""},"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"}