{"paper":{"title":"Early ultraviolet emission in the Type Ia supernova LSQ12gdj: No evidence for ongoing shock interaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Campillay, A. Gal-Yam, B. Schaefer, B. Schmidt, B. Tucker, C. Baltay, C. Burns, C. Contreras, C. Gonzalez, C. Inserra, C. Lidman, D. Rabinowitz, D. R. Young, E. Hadjiyska, E. Hsiao, E. S. Walker, F. Taddia, F. Yuan, J. Parrent, J. Sollerman, K. Krisciunas, K. Maguire, M. Childress, M. Fraser, M. L. Graham, M. M. Phillips, M. Stritzinger, M. Sullivan, N. Ellman, N. Morrell, N. Scott, O. Yaron, P. E. Nugent, P. J. Brown, R. A. Scalzo, R. McKinnon, S. J. Smartt, S. Taubenberger, S. Valenti, U. Feindt","submitted_at":"2014-04-03T16:43:17Z","abstract_excerpt":"We present photospheric-phase observations of LSQ12gdj, a slowly-declining, UV-bright Type Ia supernova. Classified well before maximum light, LSQ12gdj has extinction-corrected absolute magnitude $M_B = -19.8$, and pre-maximum spectroscopic evolution similar to SN 1991T and the super-Chandrasekhar-mass SN 2007if. We use ultraviolet photometry from Swift, ground-based optical photometry, and corrections from a near-infrared photometric template to construct the bolometric (1600-23800 \\AA) light curve out to 45 days past $B$-band maximum light. We estimate that LSQ12gdj produced $0.96 \\pm 0.07$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1002","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"}