{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:4DMQEDYB3NA2ECY5DN7KUNUJQS","short_pith_number":"pith:4DMQEDYB","canonical_record":{"source":{"id":"1203.0006","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-29T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"dabef11c4ee8e07e55a17ce62f4d12993cdb43e0518fe50b7927804668c384eb","abstract_canon_sha256":"6ef65c995f6f87388a8e2dabc7bcb2da94b7629e78250a48c57e58c6ad8f258c"},"schema_version":"1.0"},"canonical_sha256":"e0d9020f01db41a20b1d1b7eaa368984a02989eb87ca711be1dffdeab3bd3f59","source":{"kind":"arxiv","id":"1203.0006","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0006","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0006v1","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0006","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"pith_short_12","alias_value":"4DMQEDYB3NA2","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4DMQEDYB3NA2ECY5","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4DMQEDYB","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:4DMQEDYB3NA2ECY5DN7KUNUJQS","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0006","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-29T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"dabef11c4ee8e07e55a17ce62f4d12993cdb43e0518fe50b7927804668c384eb","abstract_canon_sha256":"6ef65c995f6f87388a8e2dabc7bcb2da94b7629e78250a48c57e58c6ad8f258c"},"schema_version":"1.0"},"canonical_sha256":"e0d9020f01db41a20b1d1b7eaa368984a02989eb87ca711be1dffdeab3bd3f59","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:18.148086Z","signature_b64":"kEyYhWHgHm8kvxFK6e6Qw4Zcjb8OkVygF4YbNsTzuzyV+EaZrV6izWH9+XgpykDS7sLLEcwIBVT1Gn/g0LteDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e0d9020f01db41a20b1d1b7eaa368984a02989eb87ca711be1dffdeab3bd3f59","last_reissued_at":"2026-05-18T01:58:18.147406Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:18.147406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0006","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":"2026-05-18T01:58:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IaTfR2EKqOc62dSqXyLsEUo0a1eA3+GZ7yhRO+8JOTkgXDZ/HrGoaRcVWRN4htxnU09BSK5XEcMMHMd/QPlRBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:25:56.887308Z"},"content_sha256":"ee83ca75c96a49713bde549919251262e9d2a40eea96454f252a1fce69cd68b5","schema_version":"1.0","event_id":"sha256:ee83ca75c96a49713bde549919251262e9d2a40eea96454f252a1fce69cd68b5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:4DMQEDYB3NA2ECY5DN7KUNUJQS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Late-Time Optical Emission From Core-Collapse Supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"D. Milisavljevic, M. Turatto, P. Challis, R. Chevalier, R. Fesen, R. Kirshner","submitted_at":"2012-02-29T21:00:02Z","abstract_excerpt":"Ground-based optical spectra and Hubble Space Telescope images of ten core-collapse supernovae (CCSNe) obtained several years to decades after outburst are analyzed with the aim of understanding the general properties of their late-time emissions. New observations of SN 1957D, 1970G, 1980K, and 1993J are included as part of the study. Blueshifted line emissions in oxygen and/or hydrogen with conspicuous line substructure are a common and long-lasting phenomenon in the late-time spectra. Followed through multiple epochs, changes in the relative strengths and velocity widths of the emission line"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0006","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":"2026-05-18T01:58:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qYw9gseAmhqh124Q/kk7Qg7MRzWuO0A8u3rq2GHZ3m5iP9iOxHUO7MlNjvrHuZmYDT5RLOvF5a1CixGuattMBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:25:56.887666Z"},"content_sha256":"8f6c0f3ef815c08a1d5dd6abee89e86d25e1acd8e0d69cd58cb8896a98999106","schema_version":"1.0","event_id":"sha256:8f6c0f3ef815c08a1d5dd6abee89e86d25e1acd8e0d69cd58cb8896a98999106"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/bundle.json","state_url":"https://pith.science/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/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":"2026-05-28T03:25:56Z","links":{"resolver":"https://pith.science/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS","bundle":"https://pith.science/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/bundle.json","state":"https://pith.science/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4DMQEDYB3NA2ECY5DN7KUNUJQS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:4DMQEDYB3NA2ECY5DN7KUNUJQS","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":"6ef65c995f6f87388a8e2dabc7bcb2da94b7629e78250a48c57e58c6ad8f258c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-29T21:00:02Z","title_canon_sha256":"dabef11c4ee8e07e55a17ce62f4d12993cdb43e0518fe50b7927804668c384eb"},"schema_version":"1.0","source":{"id":"1203.0006","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0006","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0006v1","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0006","created_at":"2026-05-18T01:58:18Z"},{"alias_kind":"pith_short_12","alias_value":"4DMQEDYB3NA2","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4DMQEDYB3NA2ECY5","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4DMQEDYB","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:8f6c0f3ef815c08a1d5dd6abee89e86d25e1acd8e0d69cd58cb8896a98999106","target":"graph","created_at":"2026-05-18T01:58:18Z","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":"Ground-based optical spectra and Hubble Space Telescope images of ten core-collapse supernovae (CCSNe) obtained several years to decades after outburst are analyzed with the aim of understanding the general properties of their late-time emissions. New observations of SN 1957D, 1970G, 1980K, and 1993J are included as part of the study. Blueshifted line emissions in oxygen and/or hydrogen with conspicuous line substructure are a common and long-lasting phenomenon in the late-time spectra. Followed through multiple epochs, changes in the relative strengths and velocity widths of the emission line","authors_text":"D. Milisavljevic, M. Turatto, P. Challis, R. Chevalier, R. Fesen, R. Kirshner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-29T21:00:02Z","title":"Late-Time Optical Emission From Core-Collapse Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0006","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:ee83ca75c96a49713bde549919251262e9d2a40eea96454f252a1fce69cd68b5","target":"record","created_at":"2026-05-18T01:58:18Z","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":"6ef65c995f6f87388a8e2dabc7bcb2da94b7629e78250a48c57e58c6ad8f258c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-29T21:00:02Z","title_canon_sha256":"dabef11c4ee8e07e55a17ce62f4d12993cdb43e0518fe50b7927804668c384eb"},"schema_version":"1.0","source":{"id":"1203.0006","kind":"arxiv","version":1}},"canonical_sha256":"e0d9020f01db41a20b1d1b7eaa368984a02989eb87ca711be1dffdeab3bd3f59","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0d9020f01db41a20b1d1b7eaa368984a02989eb87ca711be1dffdeab3bd3f59","first_computed_at":"2026-05-18T01:58:18.147406Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:18.147406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kEyYhWHgHm8kvxFK6e6Qw4Zcjb8OkVygF4YbNsTzuzyV+EaZrV6izWH9+XgpykDS7sLLEcwIBVT1Gn/g0LteDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:18.148086Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0006","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee83ca75c96a49713bde549919251262e9d2a40eea96454f252a1fce69cd68b5","sha256:8f6c0f3ef815c08a1d5dd6abee89e86d25e1acd8e0d69cd58cb8896a98999106"],"state_sha256":"db57d41842e6991ba30d066a6e6f1f9f7721258fffc5a6694f0cdefda73d3307"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L1IRh1hjidHKSO7Bg8FId9UnQx6bNwaLUjJHnG3nNYgyqP9S5D2yXuevq/IBZWeXdSp7n4vnZPBOkdROBq0iDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:25:56.889525Z","bundle_sha256":"8ff5c99ab70b5d574695ea3eb45a69d44f4f8638853dd25f1c9832e65b4718fd"}}