{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:Y22SADTDPT2HQVIL7PSX6UWU3X","short_pith_number":"pith:Y22SADTD","canonical_record":{"source":{"id":"astro-ph/0006264","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-06-19T23:40:01Z","cross_cats_sorted":[],"title_canon_sha256":"695b7313662318438066f54329848a094c638011298802f19dab319dcfc43ae3","abstract_canon_sha256":"3800e7cdbc3972d25797ce792e5de5bd8982264326901e35a4d8a33fb827802b"},"schema_version":"1.0"},"canonical_sha256":"c6b5200e637cf478550bfbe57f52d4ddf9bffdc5573b141b56f1ba39bff3f785","source":{"kind":"arxiv","id":"astro-ph/0006264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0006264","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0006264v1","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0006264","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_12","alias_value":"Y22SADTDPT2H","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_16","alias_value":"Y22SADTDPT2HQVIL","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_8","alias_value":"Y22SADTD","created_at":"2026-07-04T16:16:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:Y22SADTDPT2HQVIL7PSX6UWU3X","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0006264","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-06-19T23:40:01Z","cross_cats_sorted":[],"title_canon_sha256":"695b7313662318438066f54329848a094c638011298802f19dab319dcfc43ae3","abstract_canon_sha256":"3800e7cdbc3972d25797ce792e5de5bd8982264326901e35a4d8a33fb827802b"},"schema_version":"1.0"},"canonical_sha256":"c6b5200e637cf478550bfbe57f52d4ddf9bffdc5573b141b56f1ba39bff3f785","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:16:48.922755Z","signature_b64":"5XFm4lW79Qdn+jGM+RdRBURDJA8fsxt1DXBqfxxtaHf8Vh8QNaZInLFPI9dtm50i03NfKEqyIZelsdGKCcj5AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6b5200e637cf478550bfbe57f52d4ddf9bffdc5573b141b56f1ba39bff3f785","last_reissued_at":"2026-07-04T16:16:48.922307Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:16:48.922307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0006264","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":"2026-07-04T16:16:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S7DKT6rHNzsnyHtFfzDZNEf7DvvWuEi40iruo+bp2NHBp3RepX5+7DDO6zMdQTlRDLScWohOrw2CHymoL2vyCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:10:07.440425Z"},"content_sha256":"b66d3fbe166e15688086e5e372fa57d6a6bd47ee3350ce7741438e7abdeffc78","schema_version":"1.0","event_id":"sha256:b66d3fbe166e15688086e5e372fa57d6a6bd47ee3350ce7741438e7abdeffc78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:Y22SADTDPT2HQVIL7PSX6UWU3X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detailed Analysis of Early to Late-Time Spectra of Supernova 1993J","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) OCIW, (3) CfA), Aaron J. Barth (3), Alexei V. Filippenko (1), Douglas C. Leonard (1) ((1) UC Berkeley, Luis C. Ho (2), Thomas Matheson (1)","submitted_at":"2000-06-19T23:40:01Z","abstract_excerpt":"We present a detailed study of line structure in early to late-time spectra of Supernova (SN) 1993J. Spectra during the nebular phase, but within the first two years after explosion, exhibit small-scale structure in the emission lines of some species, notably oxygen and magnesium, showing that the ejecta of SN 1993J are clumpy. On the other hand, a lack of structure in emission lines of calcium implies that the source of calcium emission is uniformly distributed throughout the ejecta. These results are interpreted as evidence that oxygen emission originates in clumpy, newly synthesized materia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0006264","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0006264/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:16:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xw1sI9l9yDDJdNOKphiOpmWj98FB4z6zGoEnOToDtJtcECbTFM/gdH/s/vMQAMXBQ8R8Jjft4QlotEyuhgbHDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:10:07.443083Z"},"content_sha256":"fd5008d481c06687ac527b5f5cff1cd3b019921f4cd5e27d9e18944d32471dfc","schema_version":"1.0","event_id":"sha256:fd5008d481c06687ac527b5f5cff1cd3b019921f4cd5e27d9e18944d32471dfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/bundle.json","state_url":"https://pith.science/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/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":"2026-08-17T04:10:07Z","links":{"resolver":"https://pith.science/pith/Y22SADTDPT2HQVIL7PSX6UWU3X","bundle":"https://pith.science/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/bundle.json","state":"https://pith.science/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y22SADTDPT2HQVIL7PSX6UWU3X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:Y22SADTDPT2HQVIL7PSX6UWU3X","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":"3800e7cdbc3972d25797ce792e5de5bd8982264326901e35a4d8a33fb827802b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-06-19T23:40:01Z","title_canon_sha256":"695b7313662318438066f54329848a094c638011298802f19dab319dcfc43ae3"},"schema_version":"1.0","source":{"id":"astro-ph/0006264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0006264","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0006264v1","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0006264","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_12","alias_value":"Y22SADTDPT2H","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_16","alias_value":"Y22SADTDPT2HQVIL","created_at":"2026-07-04T16:16:48Z"},{"alias_kind":"pith_short_8","alias_value":"Y22SADTD","created_at":"2026-07-04T16:16:48Z"}],"graph_snapshots":[{"event_id":"sha256:fd5008d481c06687ac527b5f5cff1cd3b019921f4cd5e27d9e18944d32471dfc","target":"graph","created_at":"2026-07-04T16:16:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0006264/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a detailed study of line structure in early to late-time spectra of Supernova (SN) 1993J. Spectra during the nebular phase, but within the first two years after explosion, exhibit small-scale structure in the emission lines of some species, notably oxygen and magnesium, showing that the ejecta of SN 1993J are clumpy. On the other hand, a lack of structure in emission lines of calcium implies that the source of calcium emission is uniformly distributed throughout the ejecta. These results are interpreted as evidence that oxygen emission originates in clumpy, newly synthesized materia","authors_text":"(2) OCIW, (3) CfA), Aaron J. Barth (3), Alexei V. Filippenko (1), Douglas C. Leonard (1) ((1) UC Berkeley, Luis C. Ho (2), Thomas Matheson (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-06-19T23:40:01Z","title":"Detailed Analysis of Early to Late-Time Spectra of Supernova 1993J"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0006264","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:b66d3fbe166e15688086e5e372fa57d6a6bd47ee3350ce7741438e7abdeffc78","target":"record","created_at":"2026-07-04T16:16:48Z","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":"3800e7cdbc3972d25797ce792e5de5bd8982264326901e35a4d8a33fb827802b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-06-19T23:40:01Z","title_canon_sha256":"695b7313662318438066f54329848a094c638011298802f19dab319dcfc43ae3"},"schema_version":"1.0","source":{"id":"astro-ph/0006264","kind":"arxiv","version":1}},"canonical_sha256":"c6b5200e637cf478550bfbe57f52d4ddf9bffdc5573b141b56f1ba39bff3f785","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6b5200e637cf478550bfbe57f52d4ddf9bffdc5573b141b56f1ba39bff3f785","first_computed_at":"2026-07-04T16:16:48.922307Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:16:48.922307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5XFm4lW79Qdn+jGM+RdRBURDJA8fsxt1DXBqfxxtaHf8Vh8QNaZInLFPI9dtm50i03NfKEqyIZelsdGKCcj5AA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:16:48.922755Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0006264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b66d3fbe166e15688086e5e372fa57d6a6bd47ee3350ce7741438e7abdeffc78","sha256:fd5008d481c06687ac527b5f5cff1cd3b019921f4cd5e27d9e18944d32471dfc"],"state_sha256":"12b742017288ccf38dc392fbf6727e9a3818eaa051a1525b1d39aafc058c0cea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CO1WqkSyTlW4BxXQw1YhPHoA+bkJowOURA6ktsJxDuua9rq/1hF2DwmX4UbZaW5wgMDu3SKYqtNGzUscU9WKCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T04:10:07.448995Z","bundle_sha256":"5cf540cce5cb97b0746f8610a929c69cbc44e27e9d508ce803476510e24b5bb3"}}