{"paper":{"title":"On the progenitor of the Type IIP SN 2013ej in M74","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.CO","authors_text":"Alastair Bruce, Andy Lawrence, Avishay Gal-Yam, Cosimo Inserra, David R. Young, Fang Yuan, Justyn R. Maund, Morgan Fraser, Rubina Kotak, Stefano Benetti, Stefano Valenti, Stephen J. Smartt, Ting-Wan Chen","submitted_at":"2013-09-17T11:55:23Z","abstract_excerpt":"We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival {\\it Hubble Space Telescope} + ACS images. We find a source coincident with the SN in the {\\it F814W}-filter, however the position of the progenitor candidate in contemporaneous {\\it F435W} and {\\it F555W}-filters is significantly offset. We conclude that the \"progenitor candidate\" is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument onboard {\\it HST} taken when t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4268","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":""},"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"}