{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:VEPIB4S6YPYBFDQ4XY7R5LNP4N","short_pith_number":"pith:VEPIB4S6","canonical_record":{"source":{"id":"1905.00974","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-02T21:39:20Z","cross_cats_sorted":[],"title_canon_sha256":"8c8bae68aee57c1d0b806a920151edaac9a280fe902d864ab771cee978a93e78","abstract_canon_sha256":"529b3a41024e559aa2fcda2ad03dbce22641846b9ad412f691f80251872b555d"},"schema_version":"1.0"},"canonical_sha256":"a91e80f25ec3f0128e1cbe3f1eadafe343e077f17ad16925a7d809bef7e880c0","source":{"kind":"arxiv","id":"1905.00974","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00974","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00974v1","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00974","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"pith_short_12","alias_value":"VEPIB4S6YPYB","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VEPIB4S6YPYBFDQ4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VEPIB4S6","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:VEPIB4S6YPYBFDQ4XY7R5LNP4N","target":"record","payload":{"canonical_record":{"source":{"id":"1905.00974","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-02T21:39:20Z","cross_cats_sorted":[],"title_canon_sha256":"8c8bae68aee57c1d0b806a920151edaac9a280fe902d864ab771cee978a93e78","abstract_canon_sha256":"529b3a41024e559aa2fcda2ad03dbce22641846b9ad412f691f80251872b555d"},"schema_version":"1.0"},"canonical_sha256":"a91e80f25ec3f0128e1cbe3f1eadafe343e077f17ad16925a7d809bef7e880c0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:17.520711Z","signature_b64":"yIOI59n1zHiw91w/o+qTgiuxilTEt22aGKGxE75hgUdCU7DXnx8KNJh94KwrTkxaNswqjrUIiNT7Mo3PiMpOBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a91e80f25ec3f0128e1cbe3f1eadafe343e077f17ad16925a7d809bef7e880c0","last_reissued_at":"2026-05-17T23:46:17.520083Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:17.520083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.00974","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":"2026-05-17T23:46:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ROYSvrcWM334176nxXxcom5bXHauyFeDmMydkGv95diJpUHnBsFQWNHmJ4ptNxrLwAm7mL49v/KoA8ukcpd+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T08:58:08.878509Z"},"content_sha256":"202b374c1d736b10a27ebfb3797a517044084026fb1b3c7ecc0efde031bdcb61","schema_version":"1.0","event_id":"sha256:202b374c1d736b10a27ebfb3797a517044084026fb1b3c7ecc0efde031bdcb61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:VEPIB4S6YPYBFDQ4XY7R5LNP4N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Precise Measures of Orbital Period, Before and After Nova Eruption for QZ Aurigae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ashley Pagnotta, Bradley E. Schaefer, Christopher Johnson, David Boyd, Geoffrey C. Clayton, Jonathan Kemp, Joseph O. Patterson, Juhan Frank, Limin Xiao, Miguel Rodriguez Marco","submitted_at":"2019-05-02T21:39:20Z","abstract_excerpt":"For the ordinary classical nova QZ Aurigae (which erupted in 1964), we report 1317 magnitudes from 1912--2016, including four eclipses detected on archival photographic plates from long before the eruption. We have accurate and robust measures of the orbital period both pre-eruption and post-eruption, and we find that the orbital period decreased, with a fractional change of -290.71+-0.28 parts-per-million across the eruption, with the orbit necessarily getting smaller. Further, we find that the light curve outside of eclipses and eruption is flat at near B=17.14 from 1912--1981, whereupon the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00974","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":"2026-05-17T23:46:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wrIlKb0qFsNOrAyvjXcDOI77xkYFGEqv6PYQcSN5fev+pvl1gUU6PFsdmw3+uIqQsIzRjWm8vHH62xGGhmasBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T08:58:08.879245Z"},"content_sha256":"bd4e6f4c1b268e601188fbe03aedc539ca20903eb184167556cb975eacc6b885","schema_version":"1.0","event_id":"sha256:bd4e6f4c1b268e601188fbe03aedc539ca20903eb184167556cb975eacc6b885"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/bundle.json","state_url":"https://pith.science/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/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":"2026-05-23T08:58:08Z","links":{"resolver":"https://pith.science/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N","bundle":"https://pith.science/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/bundle.json","state":"https://pith.science/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VEPIB4S6YPYBFDQ4XY7R5LNP4N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VEPIB4S6YPYBFDQ4XY7R5LNP4N","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":"529b3a41024e559aa2fcda2ad03dbce22641846b9ad412f691f80251872b555d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-02T21:39:20Z","title_canon_sha256":"8c8bae68aee57c1d0b806a920151edaac9a280fe902d864ab771cee978a93e78"},"schema_version":"1.0","source":{"id":"1905.00974","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00974","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00974v1","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00974","created_at":"2026-05-17T23:46:17Z"},{"alias_kind":"pith_short_12","alias_value":"VEPIB4S6YPYB","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VEPIB4S6YPYBFDQ4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VEPIB4S6","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:bd4e6f4c1b268e601188fbe03aedc539ca20903eb184167556cb975eacc6b885","target":"graph","created_at":"2026-05-17T23:46:17Z","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":"For the ordinary classical nova QZ Aurigae (which erupted in 1964), we report 1317 magnitudes from 1912--2016, including four eclipses detected on archival photographic plates from long before the eruption. We have accurate and robust measures of the orbital period both pre-eruption and post-eruption, and we find that the orbital period decreased, with a fractional change of -290.71+-0.28 parts-per-million across the eruption, with the orbit necessarily getting smaller. Further, we find that the light curve outside of eclipses and eruption is flat at near B=17.14 from 1912--1981, whereupon the","authors_text":"Ashley Pagnotta, Bradley E. Schaefer, Christopher Johnson, David Boyd, Geoffrey C. Clayton, Jonathan Kemp, Joseph O. Patterson, Juhan Frank, Limin Xiao, Miguel Rodriguez Marco","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-02T21:39:20Z","title":"Precise Measures of Orbital Period, Before and After Nova Eruption for QZ Aurigae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00974","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":"sha256:202b374c1d736b10a27ebfb3797a517044084026fb1b3c7ecc0efde031bdcb61","target":"record","created_at":"2026-05-17T23:46:17Z","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":"529b3a41024e559aa2fcda2ad03dbce22641846b9ad412f691f80251872b555d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-02T21:39:20Z","title_canon_sha256":"8c8bae68aee57c1d0b806a920151edaac9a280fe902d864ab771cee978a93e78"},"schema_version":"1.0","source":{"id":"1905.00974","kind":"arxiv","version":1}},"canonical_sha256":"a91e80f25ec3f0128e1cbe3f1eadafe343e077f17ad16925a7d809bef7e880c0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a91e80f25ec3f0128e1cbe3f1eadafe343e077f17ad16925a7d809bef7e880c0","first_computed_at":"2026-05-17T23:46:17.520083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:17.520083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yIOI59n1zHiw91w/o+qTgiuxilTEt22aGKGxE75hgUdCU7DXnx8KNJh94KwrTkxaNswqjrUIiNT7Mo3PiMpOBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:17.520711Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.00974","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:202b374c1d736b10a27ebfb3797a517044084026fb1b3c7ecc0efde031bdcb61","sha256:bd4e6f4c1b268e601188fbe03aedc539ca20903eb184167556cb975eacc6b885"],"state_sha256":"dd4f993a5c486c6c3c6a15a6cb89e53bc56fa73af8d1a93bdd6933c6c367dd97"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TXBvMNrcOwfQhVs87yajd47NUtlnfZkD7CTlqc2PvRk0qj8cO0FScEFwqSShC/vDaysNTX6S/SakUCGoeyKnAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T08:58:08.883011Z","bundle_sha256":"7bc5a029e3a148ee9bb1878c4f487433c895df13541f60380bd86cb194b38296"}}