{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CEOUL7XKCXG5A2NSX7FQMFZVV6","short_pith_number":"pith:CEOUL7XK","canonical_record":{"source":{"id":"1801.03040","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-09T17:15:53Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"25e03bab0d6276ab6592e642bae06fb3726a57ac6364722b4b50b9ac3e8ef01a","abstract_canon_sha256":"1ae865deed2f3361c7769929768a590090eca1980fcef79298d7c12e59522050"},"schema_version":"1.0"},"canonical_sha256":"111d45feea15cdd069b2bfcb061735afa00238b07e294255be4baf8d343cf63d","source":{"kind":"arxiv","id":"1801.03040","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03040","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03040v1","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03040","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"pith_short_12","alias_value":"CEOUL7XKCXG5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CEOUL7XKCXG5A2NS","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CEOUL7XK","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CEOUL7XKCXG5A2NSX7FQMFZVV6","target":"record","payload":{"canonical_record":{"source":{"id":"1801.03040","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-09T17:15:53Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"25e03bab0d6276ab6592e642bae06fb3726a57ac6364722b4b50b9ac3e8ef01a","abstract_canon_sha256":"1ae865deed2f3361c7769929768a590090eca1980fcef79298d7c12e59522050"},"schema_version":"1.0"},"canonical_sha256":"111d45feea15cdd069b2bfcb061735afa00238b07e294255be4baf8d343cf63d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:15.292673Z","signature_b64":"kSwARmGxA7nd9ERMAr6Dg/5wlgCVy1VZpHKgJTOOstIAqVeeHaHt0PiIUALUrgz6g32n9M0LvFM29CPCL4vVAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"111d45feea15cdd069b2bfcb061735afa00238b07e294255be4baf8d343cf63d","last_reissued_at":"2026-05-18T00:25:15.291998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:15.291998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.03040","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":"2026-05-18T00:25:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5ytyejAaVbSyCyN1giSSW1WptR9ZLGCRdM+0LrF9ovKegB2hAVGQgek57VNLNON91U1fcHHzjwM8PY5xVUaDCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:50:18.734623Z"},"content_sha256":"48a0b5c857b226a4af316b4c3c11ad4d241e3b3cbf29798bd40c2386b6834a52","schema_version":"1.0","event_id":"sha256:48a0b5c857b226a4af316b4c3c11ad4d241e3b3cbf29798bd40c2386b6834a52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CEOUL7XKCXG5A2NSX7FQMFZVV6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SNhunt151: an explosive event inside a dense cocoon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. J. Drake, A. Morales-Garoffolo, A. Pastorello, A. V. Filippenko, D. A. Howell, E. Cappellaro, E. Kankare, F. Ciabattari, G. Pignata, G. Terreran, J. Isern, L. Tartaglia, L. Tomasella, M. Turatto, N. Elias-Rosa, P. Ochner, S. Benetti, S. C. Howerton, S. G. Djorgovski, S. Geier, S. Leonini, S. Valenti, T. Kangas","submitted_at":"2018-01-09T17:15:53Z","abstract_excerpt":"SNhunt151 was initially classified as a supernova (SN) impostor (nonterminal outburst of a massive star). It exhibited a slow increase in luminosity, lasting about 450 d, followed by a major brightening that reaches M_V ~ -18 mag. No source is detected to M_V > -13 mag in archival images at the position of SNhunt151 before the slow rise. Low-to-mid-resolution optical spectra obtained during the pronounced brightening show very little evolution, being dominated at all times by multicomponent Balmer emission lines, a signature of interaction between the material ejected in the new outburst and t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03040","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":"2026-05-18T00:25:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"51m3Kj90Nnq4DKRTL0/eTSiHRXm/DHyOtMLcs31D3CDT9HO3BY5i0SKe0r4C5P4bxpx+xP5Qu1r9snLFBwUVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:50:18.735032Z"},"content_sha256":"3c9f4c810ad89c77f25867e71b81e77a1ce9b2b7c37462b23eb87b79a7715fc6","schema_version":"1.0","event_id":"sha256:3c9f4c810ad89c77f25867e71b81e77a1ce9b2b7c37462b23eb87b79a7715fc6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/bundle.json","state_url":"https://pith.science/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/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":"2026-05-29T21:50:18Z","links":{"resolver":"https://pith.science/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6","bundle":"https://pith.science/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/bundle.json","state":"https://pith.science/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CEOUL7XKCXG5A2NSX7FQMFZVV6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CEOUL7XKCXG5A2NSX7FQMFZVV6","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":"1ae865deed2f3361c7769929768a590090eca1980fcef79298d7c12e59522050","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-09T17:15:53Z","title_canon_sha256":"25e03bab0d6276ab6592e642bae06fb3726a57ac6364722b4b50b9ac3e8ef01a"},"schema_version":"1.0","source":{"id":"1801.03040","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03040","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03040v1","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03040","created_at":"2026-05-18T00:25:15Z"},{"alias_kind":"pith_short_12","alias_value":"CEOUL7XKCXG5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CEOUL7XKCXG5A2NS","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CEOUL7XK","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:3c9f4c810ad89c77f25867e71b81e77a1ce9b2b7c37462b23eb87b79a7715fc6","target":"graph","created_at":"2026-05-18T00:25:15Z","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":"SNhunt151 was initially classified as a supernova (SN) impostor (nonterminal outburst of a massive star). It exhibited a slow increase in luminosity, lasting about 450 d, followed by a major brightening that reaches M_V ~ -18 mag. No source is detected to M_V > -13 mag in archival images at the position of SNhunt151 before the slow rise. Low-to-mid-resolution optical spectra obtained during the pronounced brightening show very little evolution, being dominated at all times by multicomponent Balmer emission lines, a signature of interaction between the material ejected in the new outburst and t","authors_text":"A. J. Drake, A. Morales-Garoffolo, A. Pastorello, A. V. Filippenko, D. A. Howell, E. Cappellaro, E. Kankare, F. Ciabattari, G. Pignata, G. Terreran, J. Isern, L. Tartaglia, L. Tomasella, M. Turatto, N. Elias-Rosa, P. Ochner, S. Benetti, S. C. Howerton, S. G. Djorgovski, S. Geier, S. Leonini, S. Valenti, T. Kangas","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-09T17:15:53Z","title":"SNhunt151: an explosive event inside a dense cocoon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03040","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":"sha256:48a0b5c857b226a4af316b4c3c11ad4d241e3b3cbf29798bd40c2386b6834a52","target":"record","created_at":"2026-05-18T00:25:15Z","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":"1ae865deed2f3361c7769929768a590090eca1980fcef79298d7c12e59522050","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-09T17:15:53Z","title_canon_sha256":"25e03bab0d6276ab6592e642bae06fb3726a57ac6364722b4b50b9ac3e8ef01a"},"schema_version":"1.0","source":{"id":"1801.03040","kind":"arxiv","version":1}},"canonical_sha256":"111d45feea15cdd069b2bfcb061735afa00238b07e294255be4baf8d343cf63d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"111d45feea15cdd069b2bfcb061735afa00238b07e294255be4baf8d343cf63d","first_computed_at":"2026-05-18T00:25:15.291998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:25:15.291998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kSwARmGxA7nd9ERMAr6Dg/5wlgCVy1VZpHKgJTOOstIAqVeeHaHt0PiIUALUrgz6g32n9M0LvFM29CPCL4vVAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:25:15.292673Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03040","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48a0b5c857b226a4af316b4c3c11ad4d241e3b3cbf29798bd40c2386b6834a52","sha256:3c9f4c810ad89c77f25867e71b81e77a1ce9b2b7c37462b23eb87b79a7715fc6"],"state_sha256":"2316d66394625832f63b1ff49a38a0261a675bd0687e227c37951926acb3dea1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GEMDVlrepIQZBL05Yv9MvarXfWhJpFGqb5fNNIb+73eQDlXHxQ00jS+karrQ973JHpgbWuaD69syHCAe/mzzCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T21:50:18.737409Z","bundle_sha256":"4ef5fd977c37aa9b6f2899df0dada59e03487982a7d05bbce37f197cc7c0ca25"}}