{"paper":{"title":"Discovery and Early Multi-Wavelength Measurements of the Energetic Type Ic Supernova PTF12gzk: A Massive-Star Explosion in a Dwarf Host Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alexei V. Filippenko, Andrew Vanderburg, Aryeh L. Fortinsky, Assaf Horesh, Avet Harutyunyan, Avishay Gal-Yam, Ben Dilday, D. Andrew Howell, David Bersier, David J. Sand, Derek B. Fox, Douglas C. Leonard, Elena Pian, Emma S. Walker, Eran O. Ofek, Iair Arcavi, Ilan Manulis, J. Chuck Horst, Jeffrey M. Silverman, Joseph W. Richards, Joshua S. Bloom, Juliette C. Becker, Kelsey I. Clubb, Kinchen J. Searcy, Luis A. Gonzalez, Mansi M. Kasliwal, Mark Sullivan, Maryam Modjaz, Matthew A. Malkan, Melissa L. Graham, Michael Bottom, Myunshin Im, Nathaniel R. Ross, Nathan Smith, Nicholas A. Moskovitz, Ofer Yaron, Paolo A. Mazzali, Peter E. Nugent, Peter J. Brown, Philip S. Muirhead, Richard C. Dixon, Robert M. Quimby, Sagi Ben-Ami, S. Bradley Cenko, Shrinivas R. Kulkarni, Thomas Matheson, Weidong Li, Yiseul Jeon","submitted_at":"2012-08-29T12:54:17Z","abstract_excerpt":"We present the discovery and extensive early-time observations of the Type Ic supernova (SN) PTF12gzk. Our finely sampled light curves show a rise of 0.8mag within 2.5hr. Power-law fits [f(t)\\sim(t-t_0)^n] to these data constrain the explosion date to within one day. We cannot rule out the expected quadratic fireball model, but higher values of n are possible as well for larger areas in the fit parameter space. Our bolometric light curve and a dense spectral sequence are used to estimate the physical parameters of the exploding star and of the explosion. We show that the photometric evolution "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5900","kind":"arxiv","version":3},"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"}