{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IOVTGL7ZK4NSUBRP6W3BLCGVA2","short_pith_number":"pith:IOVTGL7Z","canonical_record":{"source":{"id":"1104.0864","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-05T14:52:55Z","cross_cats_sorted":[],"title_canon_sha256":"f1cb8c895b51312d1ac6fd35ceffaf2aebf61d6bc7b87a7d4737356135490f3f","abstract_canon_sha256":"fc4323aef5983978bbd85745745fb8b878aaa71701ca649fa84ab808cb42fc03"},"schema_version":"1.0"},"canonical_sha256":"43ab332ff9571b2a062ff5b61588d506ba47279d42c969730bd75a394c116f25","source":{"kind":"arxiv","id":"1104.0864","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.0864","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"arxiv_version","alias_value":"1104.0864v1","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.0864","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"pith_short_12","alias_value":"IOVTGL7ZK4NS","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IOVTGL7ZK4NSUBRP","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IOVTGL7Z","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IOVTGL7ZK4NSUBRP6W3BLCGVA2","target":"record","payload":{"canonical_record":{"source":{"id":"1104.0864","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-05T14:52:55Z","cross_cats_sorted":[],"title_canon_sha256":"f1cb8c895b51312d1ac6fd35ceffaf2aebf61d6bc7b87a7d4737356135490f3f","abstract_canon_sha256":"fc4323aef5983978bbd85745745fb8b878aaa71701ca649fa84ab808cb42fc03"},"schema_version":"1.0"},"canonical_sha256":"43ab332ff9571b2a062ff5b61588d506ba47279d42c969730bd75a394c116f25","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:37.803511Z","signature_b64":"HFph/McdgevXaUcrIz5KiZqgru3C0mOXQZrYESFsn9imxs6c0bwP3nQqx99CjOKyg5Nm1Kz98MfIJ2euDcDyAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43ab332ff9571b2a062ff5b61588d506ba47279d42c969730bd75a394c116f25","last_reissued_at":"2026-05-18T02:02:37.802858Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:37.802858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.0864","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":"2026-05-18T02:02:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/rc9j2K7eprzADfcmepQ3QnFF2CbKdiM7rKahK38LhF7xp0w1xuvVUwaTfHAdKe0Whb7BSceW9yeFuGILjSVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:59:06.297506Z"},"content_sha256":"004be9c03bb7e712045375d1f983a8c7a37b4db8b2d3a5d5c1514415c9237ab3","schema_version":"1.0","event_id":"sha256:004be9c03bb7e712045375d1f983a8c7a37b4db8b2d3a5d5c1514415c9237ab3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IOVTGL7ZK4NSUBRP6W3BLCGVA2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Orbital Period Changes in Nova Outbursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Bradley E. Schaefer, Mario Livio, Rebecca G. Martin","submitted_at":"2011-04-05T14:52:55Z","abstract_excerpt":"We propose a new mechanism that produces an orbital period change during a nova outburst. When the ejected material carries away the specific angular momentum of the white dwarf, the orbital period increases. A magnetic field on the surface of the secondary star forces a fraction of the ejected material to corotate with the star, and hence the binary system. The ejected material thus takes angular momentum from the binary orbit and the orbital period decreases. We show that for sufficiently strong magnetic fields on the surface of the secondary star, the total change to the orbital period coul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.0864","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":"2026-05-18T02:02:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IIcyNIC56JV7EwYW5y2ifMcBvnDE9CVLAubHvHsKzVYoqZ5TgxHi+HxQs/49FwtzsBtFe4SfSZtfIOTNtNjOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:59:06.297884Z"},"content_sha256":"8a426df0ef3c5c39329a84ed0dccc16279d1fc4965f4571b92828bcdc56a91bd","schema_version":"1.0","event_id":"sha256:8a426df0ef3c5c39329a84ed0dccc16279d1fc4965f4571b92828bcdc56a91bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/bundle.json","state_url":"https://pith.science/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/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":"2026-06-03T10:59:06Z","links":{"resolver":"https://pith.science/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2","bundle":"https://pith.science/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/bundle.json","state":"https://pith.science/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IOVTGL7ZK4NSUBRP6W3BLCGVA2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IOVTGL7ZK4NSUBRP6W3BLCGVA2","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":"fc4323aef5983978bbd85745745fb8b878aaa71701ca649fa84ab808cb42fc03","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-05T14:52:55Z","title_canon_sha256":"f1cb8c895b51312d1ac6fd35ceffaf2aebf61d6bc7b87a7d4737356135490f3f"},"schema_version":"1.0","source":{"id":"1104.0864","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.0864","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"arxiv_version","alias_value":"1104.0864v1","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.0864","created_at":"2026-05-18T02:02:37Z"},{"alias_kind":"pith_short_12","alias_value":"IOVTGL7ZK4NS","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IOVTGL7ZK4NSUBRP","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IOVTGL7Z","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:8a426df0ef3c5c39329a84ed0dccc16279d1fc4965f4571b92828bcdc56a91bd","target":"graph","created_at":"2026-05-18T02:02:37Z","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 propose a new mechanism that produces an orbital period change during a nova outburst. When the ejected material carries away the specific angular momentum of the white dwarf, the orbital period increases. A magnetic field on the surface of the secondary star forces a fraction of the ejected material to corotate with the star, and hence the binary system. The ejected material thus takes angular momentum from the binary orbit and the orbital period decreases. We show that for sufficiently strong magnetic fields on the surface of the secondary star, the total change to the orbital period coul","authors_text":"Bradley E. Schaefer, Mario Livio, Rebecca G. Martin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-05T14:52:55Z","title":"On Orbital Period Changes in Nova Outbursts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.0864","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":"sha256:004be9c03bb7e712045375d1f983a8c7a37b4db8b2d3a5d5c1514415c9237ab3","target":"record","created_at":"2026-05-18T02:02:37Z","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":"fc4323aef5983978bbd85745745fb8b878aaa71701ca649fa84ab808cb42fc03","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-05T14:52:55Z","title_canon_sha256":"f1cb8c895b51312d1ac6fd35ceffaf2aebf61d6bc7b87a7d4737356135490f3f"},"schema_version":"1.0","source":{"id":"1104.0864","kind":"arxiv","version":1}},"canonical_sha256":"43ab332ff9571b2a062ff5b61588d506ba47279d42c969730bd75a394c116f25","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43ab332ff9571b2a062ff5b61588d506ba47279d42c969730bd75a394c116f25","first_computed_at":"2026-05-18T02:02:37.802858Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:37.802858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HFph/McdgevXaUcrIz5KiZqgru3C0mOXQZrYESFsn9imxs6c0bwP3nQqx99CjOKyg5Nm1Kz98MfIJ2euDcDyAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:37.803511Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.0864","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:004be9c03bb7e712045375d1f983a8c7a37b4db8b2d3a5d5c1514415c9237ab3","sha256:8a426df0ef3c5c39329a84ed0dccc16279d1fc4965f4571b92828bcdc56a91bd"],"state_sha256":"fa2e7936367a9488f85166e5c7dbd9d543e56ef127e2890a45614d5be78a4fed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"La8EqYlRCITnWPd+NHNj6DEFtQL3gM/chJMphlyWaG7UVyaz4XC4fF5zwYrJDswaQiV/CQb83MpwtoGCePHvDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T10:59:06.299784Z","bundle_sha256":"f7471160a7c3fc10159bf4bed84b1d576a7bcfb2a6a18a8f3a4b22e39048384c"}}