{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IO57WYF6H4QMSRDHEGQ6MGXWTI","short_pith_number":"pith:IO57WYF6","canonical_record":{"source":{"id":"1510.02084","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:32:29Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"3c880dc0a5bb7926ea278fda157e19d9dbde031bb593e1a4dfd7c850b305a78e","abstract_canon_sha256":"041e0bc65af7f7c210336363cb89ae98925cad581d0aa39afc0db054c23f3cc2"},"schema_version":"1.0"},"canonical_sha256":"43bbfb60be3f20c9446721a1e61af69a143e634770c944166436952eda3bee17","source":{"kind":"arxiv","id":"1510.02084","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02084","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02084v1","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02084","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"IO57WYF6H4QM","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IO57WYF6H4QMSRDH","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IO57WYF6","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IO57WYF6H4QMSRDHEGQ6MGXWTI","target":"record","payload":{"canonical_record":{"source":{"id":"1510.02084","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:32:29Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"3c880dc0a5bb7926ea278fda157e19d9dbde031bb593e1a4dfd7c850b305a78e","abstract_canon_sha256":"041e0bc65af7f7c210336363cb89ae98925cad581d0aa39afc0db054c23f3cc2"},"schema_version":"1.0"},"canonical_sha256":"43bbfb60be3f20c9446721a1e61af69a143e634770c944166436952eda3bee17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:48.539625Z","signature_b64":"fyXHHX5itlDD5Gp2wKpABHONg0hpjWo4EpKsIVXNXbE/xrsos6cRTyivQznOWZIHTBJ1zTu0HYp9dqaKeYpnBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43bbfb60be3f20c9446721a1e61af69a143e634770c944166436952eda3bee17","last_reissued_at":"2026-05-18T01:30:48.539184Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:48.539184Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.02084","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sSRzs4ixD+qyyWtCU0XkrqfuERPXAW4qmk8kh4QAjEAEKm4S4p2VbFafBM2BWqdIXQQ2a0ib1//lUGHpqoT0CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:13:59.831129Z"},"content_sha256":"887434a634881009b1a2397333d1af79ef1055b124e10932397dfe80709be9d1","schema_version":"1.0","event_id":"sha256:887434a634881009b1a2397333d1af79ef1055b124e10932397dfe80709be9d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IO57WYF6H4QMSRDHEGQ6MGXWTI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Very Early Light Curve of SN 2015F in NGC 2442: A Possible Detection of Shock-Heated Cooling Emission and Constraints on SN Ia Progenitor System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Changsu Choi, Hyun-Il Sung, Jae-Woo Kim, Libert A. G. Monard, Myungshin Im, Shuhrat A. Ehgamberdiev, Sung-Chul Yoon","submitted_at":"2015-10-07T07:32:29Z","abstract_excerpt":"The main progenitor candidate of Type Ia supernovae (SNe Ia) is white dwarfs in binary systems where the companion star is another white dwarf (double degenerate system) or a less evolved non-degenerate star with R* >~ 0.1 Rsun (single degenerate system), but no direct observational evidence exists that tells which progenitor system is more common. Recent studies suggest that the light curve of a supernova shortly after its explosion can be used to set a limit on the progenitor size, R*. Here, we report a high cadence monitoring observation of SN 2015F, a normal SN Ia, in the galaxy NGC 2442 s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02084","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0oZQmBVNAqWl2LWTNYU2ptFgC7shXJtNUfmJdXcL0s7n2llkT0xhlzMjJ5tiK97tIPVy+Uxx1g5Ya7qFaUeUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:13:59.831910Z"},"content_sha256":"5ccfa73e0503d010e1211ccee43c839586035be3d0e3fd848a123a75736e5ef2","schema_version":"1.0","event_id":"sha256:5ccfa73e0503d010e1211ccee43c839586035be3d0e3fd848a123a75736e5ef2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/bundle.json","state_url":"https://pith.science/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T20:13:59Z","links":{"resolver":"https://pith.science/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI","bundle":"https://pith.science/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/bundle.json","state":"https://pith.science/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IO57WYF6H4QMSRDHEGQ6MGXWTI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IO57WYF6H4QMSRDHEGQ6MGXWTI","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"041e0bc65af7f7c210336363cb89ae98925cad581d0aa39afc0db054c23f3cc2","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:32:29Z","title_canon_sha256":"3c880dc0a5bb7926ea278fda157e19d9dbde031bb593e1a4dfd7c850b305a78e"},"schema_version":"1.0","source":{"id":"1510.02084","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02084","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02084v1","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02084","created_at":"2026-05-18T01:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"IO57WYF6H4QM","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IO57WYF6H4QMSRDH","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IO57WYF6","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:5ccfa73e0503d010e1211ccee43c839586035be3d0e3fd848a123a75736e5ef2","target":"graph","created_at":"2026-05-18T01:30:48Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The main progenitor candidate of Type Ia supernovae (SNe Ia) is white dwarfs in binary systems where the companion star is another white dwarf (double degenerate system) or a less evolved non-degenerate star with R* >~ 0.1 Rsun (single degenerate system), but no direct observational evidence exists that tells which progenitor system is more common. Recent studies suggest that the light curve of a supernova shortly after its explosion can be used to set a limit on the progenitor size, R*. Here, we report a high cadence monitoring observation of SN 2015F, a normal SN Ia, in the galaxy NGC 2442 s","authors_text":"Changsu Choi, Hyun-Il Sung, Jae-Woo Kim, Libert A. G. Monard, Myungshin Im, Shuhrat A. Ehgamberdiev, Sung-Chul Yoon","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:32:29Z","title":"The Very Early Light Curve of SN 2015F in NGC 2442: A Possible Detection of Shock-Heated Cooling Emission and Constraints on SN Ia Progenitor System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02084","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:887434a634881009b1a2397333d1af79ef1055b124e10932397dfe80709be9d1","target":"record","created_at":"2026-05-18T01:30:48Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"041e0bc65af7f7c210336363cb89ae98925cad581d0aa39afc0db054c23f3cc2","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:32:29Z","title_canon_sha256":"3c880dc0a5bb7926ea278fda157e19d9dbde031bb593e1a4dfd7c850b305a78e"},"schema_version":"1.0","source":{"id":"1510.02084","kind":"arxiv","version":1}},"canonical_sha256":"43bbfb60be3f20c9446721a1e61af69a143e634770c944166436952eda3bee17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43bbfb60be3f20c9446721a1e61af69a143e634770c944166436952eda3bee17","first_computed_at":"2026-05-18T01:30:48.539184Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:48.539184Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fyXHHX5itlDD5Gp2wKpABHONg0hpjWo4EpKsIVXNXbE/xrsos6cRTyivQznOWZIHTBJ1zTu0HYp9dqaKeYpnBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:48.539625Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.02084","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:887434a634881009b1a2397333d1af79ef1055b124e10932397dfe80709be9d1","sha256:5ccfa73e0503d010e1211ccee43c839586035be3d0e3fd848a123a75736e5ef2"],"state_sha256":"f9a6c67ba211350ee9c9d45b6218dba66676d4ad8aef1591556474d01d2da550"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HrBeBofUg/+s93oJcIWxNkPE/byItrVDhmDbDeZBLvGs0+9RRw+wyOpSCS9syh/FQGAQXDDYVcCTYvSW+VRCCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:13:59.835939Z","bundle_sha256":"3f0bbec03ef2a2386dee8998e9b60399b4248ff15a60b8425a7b808e40c05913"}}