{"paper":{"title":"Type Ia SN 2019ein: New Insights into the Similarities and diversities among High-Velocity SNe Ia","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Daisaku Nogami, Daisuke Kuroda, Fumiya Imazato, Haruki Sugiyama, Hidekazu Hanayama, Hiroki Kimura, Hiroki Onozato, Hiroshi Akitaya, Hiroyuki Maehara, Ji-an Jiang, Jun Takahashi, Katsuhiro Murata, Kazuhiro Sekiguchi, Kazuki Shiraishi, Kazuya Matsubayashi, Keiichi Maeda, Keisuke Isogai, Kengo Takagi, Kenta Taguchi, Koji Kawabata, Kota Iida, Kumiko Morihana, Mahito Sasada, Masaaki Otsuka, Masafumi Niwano, Masaki Takayama, Masaru Kino, Masayuki Yamanaka, Miho Kawabata, Miyako Tozuka, Motoki Oeda, Noriyuki Katoh, Ryo Adachi, Ryohei Hosokawa, Seiko Takagi, Takashi Horiuchi, Takashi Nagao, Tatsuharu Ono, Tatsuya Nakaoka, Tomoki Saito, Umut Burgaz","submitted_at":"2019-08-08T10:24:53Z","abstract_excerpt":"We present optical observations of type Ia supernova (SN) 2019ein, starting at 2 days after the estimated explosion date. The spectra and the light curves show that SN 2019ein belongs to the High-Velocity (HV) and Bload Line groups with relatively rapid decline in the light curves (Delta m15(B) = 1.36 +- 0.02 mag) and the short rise time (15.37 +- 0.55 days). The Si II 6355 velocity, associated with a photospheric component but not with a detached high-velocity feature, reached ~ 20,000 km s-1 at 12 days before the B-band maximum. The line velocity however decreased very rapidly and smoothly t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03001","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.03001/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"}