{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:CR2X65GK5EQTRYKUCER7HWM2RC","short_pith_number":"pith:CR2X65GK","canonical_record":{"source":{"id":"0903.3833","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-03-23T11:30:10Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9b9eeea0057832ed667a5f40e32717c05d4fd5d1671ea91e627b4c6ea98c5be6","abstract_canon_sha256":"2947a38e059d71b071d4714bcc9051577a85d8a1851b09eac7c172d31aeaafda"},"schema_version":"1.0"},"canonical_sha256":"14757f74cae92138e1541123f3d99a88b0a08eb33e8dd9335d0d9b366236ff89","source":{"kind":"arxiv","id":"0903.3833","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.3833","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"arxiv_version","alias_value":"0903.3833v3","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.3833","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"pith_short_12","alias_value":"CR2X65GK5EQT","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CR2X65GK5EQTRYKU","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CR2X65GK","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:CR2X65GK5EQTRYKUCER7HWM2RC","target":"record","payload":{"canonical_record":{"source":{"id":"0903.3833","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-03-23T11:30:10Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9b9eeea0057832ed667a5f40e32717c05d4fd5d1671ea91e627b4c6ea98c5be6","abstract_canon_sha256":"2947a38e059d71b071d4714bcc9051577a85d8a1851b09eac7c172d31aeaafda"},"schema_version":"1.0"},"canonical_sha256":"14757f74cae92138e1541123f3d99a88b0a08eb33e8dd9335d0d9b366236ff89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:26.631588Z","signature_b64":"KdwCfDBc4x3UZlTrxjSviQiH/5xUfquAIQ5Dwuz5B8oqZQKMXhA8/mobq3o+enzm4zkSxFdASklBuIBF0I1rDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"14757f74cae92138e1541123f3d99a88b0a08eb33e8dd9335d0d9b366236ff89","last_reissued_at":"2026-05-18T02:14:26.630977Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:26.630977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.3833","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:14:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JjjQLgW2+hg2IXfeZpoQuEi7okESpuQfkogrejPXe04dDJNO8UQhqedHxpG1B5WT6oN6rEyh1FZA6XuncgqQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:38:47.846871Z"},"content_sha256":"b3dc14d3b9d62f4fe506e49d8ee5bd8a568d8fc7adbb9bdd8b5b6a37448538d6","schema_version":"1.0","event_id":"sha256:b3dc14d3b9d62f4fe506e49d8ee5bd8a568d8fc7adbb9bdd8b5b6a37448538d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:CR2X65GK5EQTRYKUCER7HWM2RC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Decade of SN1993J: Discovery of Wavelength Effects in the Expansion Rate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A. Alberdi, A.R. Whitney, C.J. Stockdale, C. Trigilio, E. Ros, F. Mantovani, I.I. Shapiro, I. Marti-Vidal, J.C. Guirado, J.M. Marcaide, K.W. Weiler, L. Lara, M.A. Perez-Torres, P.J. Diamond, R.A. Preston, R.A. Sramek, R.T. Schilizzi, S.D. Van Dyk","submitted_at":"2009-03-23T11:30:10Z","abstract_excerpt":"We have studied the growth of the shell-like radio structure of supernova SN1993J in M81 from September 1993 through October 2003 with very-long-baseline interferometry (VLBI) observations at the wavelengths of 3.6, 6, and 18cm. For this purpose, we have developed a method to accurately determine the outer radius (R) of any circularly symmetric compact radio structure like SN1993J.\n  The source structure of SN1993J remains circularly symmetric (with deviations from circularity under 2%) over almost 4000 days. We characterize the decelerated expansion of SN 1993J through approximately day 1500 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.3833","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":""},"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":"2026-05-18T02:14:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2EJb1AUycnHQWrgVBuK04uYFML6EXULIUZJtOUSzETg/Ci7CH2OqI+yedLhXL0MnVF/mn0elWQc3PB9tq1HrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:38:47.847595Z"},"content_sha256":"b6d205fd37ce5191cdcd8bf236d3d35d23aea6882ca734d9d3470e10062352cc","schema_version":"1.0","event_id":"sha256:b6d205fd37ce5191cdcd8bf236d3d35d23aea6882ca734d9d3470e10062352cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CR2X65GK5EQTRYKUCER7HWM2RC/bundle.json","state_url":"https://pith.science/pith/CR2X65GK5EQTRYKUCER7HWM2RC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CR2X65GK5EQTRYKUCER7HWM2RC/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":"2026-05-26T20:38:47Z","links":{"resolver":"https://pith.science/pith/CR2X65GK5EQTRYKUCER7HWM2RC","bundle":"https://pith.science/pith/CR2X65GK5EQTRYKUCER7HWM2RC/bundle.json","state":"https://pith.science/pith/CR2X65GK5EQTRYKUCER7HWM2RC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CR2X65GK5EQTRYKUCER7HWM2RC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:CR2X65GK5EQTRYKUCER7HWM2RC","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":"2947a38e059d71b071d4714bcc9051577a85d8a1851b09eac7c172d31aeaafda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-03-23T11:30:10Z","title_canon_sha256":"9b9eeea0057832ed667a5f40e32717c05d4fd5d1671ea91e627b4c6ea98c5be6"},"schema_version":"1.0","source":{"id":"0903.3833","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.3833","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"arxiv_version","alias_value":"0903.3833v3","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.3833","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"pith_short_12","alias_value":"CR2X65GK5EQT","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CR2X65GK5EQTRYKU","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CR2X65GK","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:b6d205fd37ce5191cdcd8bf236d3d35d23aea6882ca734d9d3470e10062352cc","target":"graph","created_at":"2026-05-18T02:14:26Z","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":"We have studied the growth of the shell-like radio structure of supernova SN1993J in M81 from September 1993 through October 2003 with very-long-baseline interferometry (VLBI) observations at the wavelengths of 3.6, 6, and 18cm. For this purpose, we have developed a method to accurately determine the outer radius (R) of any circularly symmetric compact radio structure like SN1993J.\n  The source structure of SN1993J remains circularly symmetric (with deviations from circularity under 2%) over almost 4000 days. We characterize the decelerated expansion of SN 1993J through approximately day 1500 ","authors_text":"A. Alberdi, A.R. Whitney, C.J. Stockdale, C. Trigilio, E. Ros, F. Mantovani, I.I. Shapiro, I. Marti-Vidal, J.C. Guirado, J.M. Marcaide, K.W. Weiler, L. Lara, M.A. Perez-Torres, P.J. Diamond, R.A. Preston, R.A. Sramek, R.T. Schilizzi, S.D. Van Dyk","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-03-23T11:30:10Z","title":"A Decade of SN1993J: Discovery of Wavelength Effects in the Expansion Rate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.3833","kind":"arxiv","version":3},"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:b3dc14d3b9d62f4fe506e49d8ee5bd8a568d8fc7adbb9bdd8b5b6a37448538d6","target":"record","created_at":"2026-05-18T02:14:26Z","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":"2947a38e059d71b071d4714bcc9051577a85d8a1851b09eac7c172d31aeaafda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-03-23T11:30:10Z","title_canon_sha256":"9b9eeea0057832ed667a5f40e32717c05d4fd5d1671ea91e627b4c6ea98c5be6"},"schema_version":"1.0","source":{"id":"0903.3833","kind":"arxiv","version":3}},"canonical_sha256":"14757f74cae92138e1541123f3d99a88b0a08eb33e8dd9335d0d9b366236ff89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"14757f74cae92138e1541123f3d99a88b0a08eb33e8dd9335d0d9b366236ff89","first_computed_at":"2026-05-18T02:14:26.630977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:26.630977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KdwCfDBc4x3UZlTrxjSviQiH/5xUfquAIQ5Dwuz5B8oqZQKMXhA8/mobq3o+enzm4zkSxFdASklBuIBF0I1rDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:26.631588Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.3833","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3dc14d3b9d62f4fe506e49d8ee5bd8a568d8fc7adbb9bdd8b5b6a37448538d6","sha256:b6d205fd37ce5191cdcd8bf236d3d35d23aea6882ca734d9d3470e10062352cc"],"state_sha256":"6f6712a9ccd6a7d26aa0bcb6474e88db55b2ff9d1fb4c5643476a2f7881662c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J6AwdxX6OP8pwBKtyFTu24NYoBzQpAMiNSZ/O1knLkvQzl/3C1gIhiEBYvgwGkmkMIuyCZUO3+XifrzIs7GFDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:38:47.851514Z","bundle_sha256":"0ce0867004e37364f1806666eacc47b2e0bc538c4d352cfcf300eba1e060a765"}}