{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JSH37FDKXDZW2O74QVGJKLLYJZ","short_pith_number":"pith:JSH37FDK","canonical_record":{"source":{"id":"1801.01049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-03T15:27:29Z","cross_cats_sorted":[],"title_canon_sha256":"62833f08ffe85e455fe57ce5ee0ad2a9034811f55c31dfc1b18d8dcdcacef0d4","abstract_canon_sha256":"001b5ff985ff27e52be5c7d14493e6112413bc64bb1091a8a536ba3a8f80f229"},"schema_version":"1.0"},"canonical_sha256":"4c8fbf946ab8f36d3bfc854c952d784e5cebd8208baf4aea8b279c1985a44f19","source":{"kind":"arxiv","id":"1801.01049","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.01049","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1801.01049v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.01049","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"JSH37FDKXDZW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JSH37FDKXDZW2O74","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JSH37FDK","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JSH37FDKXDZW2O74QVGJKLLYJZ","target":"record","payload":{"canonical_record":{"source":{"id":"1801.01049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-03T15:27:29Z","cross_cats_sorted":[],"title_canon_sha256":"62833f08ffe85e455fe57ce5ee0ad2a9034811f55c31dfc1b18d8dcdcacef0d4","abstract_canon_sha256":"001b5ff985ff27e52be5c7d14493e6112413bc64bb1091a8a536ba3a8f80f229"},"schema_version":"1.0"},"canonical_sha256":"4c8fbf946ab8f36d3bfc854c952d784e5cebd8208baf4aea8b279c1985a44f19","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:23.049863Z","signature_b64":"S69GsYv3N06/LpQ7Qt6Sep+uT6XwR4q97pu8Ij7h+NAuYk5tc9PeoSrqgQb694iSjk/4IYrMvt5FYtSoVcq8Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c8fbf946ab8f36d3bfc854c952d784e5cebd8208baf4aea8b279c1985a44f19","last_reissued_at":"2026-05-18T00:26:23.049134Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:23.049134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.01049","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2BJa2roZGNE4TobXckTh/M9mAsiOkhzb/rbUTpSiX9c8zY9DxU+fgsJBnyTfGcwYJTXVruAaayTVbGTumIqvBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T12:38:25.110121Z"},"content_sha256":"4b238711847ea7f5b308d92e601fa5425ca0d7514024ea05e8bbaf32aa748d86","schema_version":"1.0","event_id":"sha256:4b238711847ea7f5b308d92e601fa5425ca0d7514024ea05e8bbaf32aa748d86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JSH37FDKXDZW2O74QVGJKLLYJZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Orbital Period Increase in ES Ceti","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) Columbia Univ., (3) Middlebury Coll., (4) Center for Backyard Astrophysics), Berto Monard (4), Enrique de Miguel (1), Gordon Myers (4), Jonathan Kemp (3), Joseph Patterson (2), Lewis Cook (4) ((1) Univ. de Huelva, Robert Rea (4), Thomas Krajci (4)","submitted_at":"2018-01-03T15:27:29Z","abstract_excerpt":"We report a long-term study of the eclipse times in the 10-minute helium binary ES Ceti. The binary period increases rapidly, with P/P-dot = 6.2x10^6 yr. This is consistent with the assumption that gravitational radiation (GR) drives the mass transfer, and appears to be the first dynamical evidence that GR is indeed the driver of evolution in this class of very old cataclysmic variables -- the AM Canum Venaticorum stars."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01049","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TOVQlcIrCT5O6Pp1R+P012R6CWGFw797c5h4BT7BgXN99y/H2a6Rxe3ufrh1Z0j0xpNvVf+fCwzwUNW7mFLVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T12:38:25.110483Z"},"content_sha256":"7746efe2d842a00c746bcacaf30bcb6798a12ac4725c68227b650346866acbc1","schema_version":"1.0","event_id":"sha256:7746efe2d842a00c746bcacaf30bcb6798a12ac4725c68227b650346866acbc1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/bundle.json","state_url":"https://pith.science/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/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":"2026-06-08T12:38:25Z","links":{"resolver":"https://pith.science/pith/JSH37FDKXDZW2O74QVGJKLLYJZ","bundle":"https://pith.science/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/bundle.json","state":"https://pith.science/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JSH37FDKXDZW2O74QVGJKLLYJZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JSH37FDKXDZW2O74QVGJKLLYJZ","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":"001b5ff985ff27e52be5c7d14493e6112413bc64bb1091a8a536ba3a8f80f229","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-03T15:27:29Z","title_canon_sha256":"62833f08ffe85e455fe57ce5ee0ad2a9034811f55c31dfc1b18d8dcdcacef0d4"},"schema_version":"1.0","source":{"id":"1801.01049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.01049","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1801.01049v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.01049","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"JSH37FDKXDZW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JSH37FDKXDZW2O74","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JSH37FDK","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:7746efe2d842a00c746bcacaf30bcb6798a12ac4725c68227b650346866acbc1","target":"graph","created_at":"2026-05-18T00:26:23Z","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 report a long-term study of the eclipse times in the 10-minute helium binary ES Ceti. The binary period increases rapidly, with P/P-dot = 6.2x10^6 yr. This is consistent with the assumption that gravitational radiation (GR) drives the mass transfer, and appears to be the first dynamical evidence that GR is indeed the driver of evolution in this class of very old cataclysmic variables -- the AM Canum Venaticorum stars.","authors_text":"(2) Columbia Univ., (3) Middlebury Coll., (4) Center for Backyard Astrophysics), Berto Monard (4), Enrique de Miguel (1), Gordon Myers (4), Jonathan Kemp (3), Joseph Patterson (2), Lewis Cook (4) ((1) Univ. de Huelva, Robert Rea (4), Thomas Krajci (4)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-03T15:27:29Z","title":"Orbital Period Increase in ES Ceti"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01049","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":"sha256:4b238711847ea7f5b308d92e601fa5425ca0d7514024ea05e8bbaf32aa748d86","target":"record","created_at":"2026-05-18T00:26:23Z","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":"001b5ff985ff27e52be5c7d14493e6112413bc64bb1091a8a536ba3a8f80f229","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-03T15:27:29Z","title_canon_sha256":"62833f08ffe85e455fe57ce5ee0ad2a9034811f55c31dfc1b18d8dcdcacef0d4"},"schema_version":"1.0","source":{"id":"1801.01049","kind":"arxiv","version":1}},"canonical_sha256":"4c8fbf946ab8f36d3bfc854c952d784e5cebd8208baf4aea8b279c1985a44f19","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c8fbf946ab8f36d3bfc854c952d784e5cebd8208baf4aea8b279c1985a44f19","first_computed_at":"2026-05-18T00:26:23.049134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:23.049134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S69GsYv3N06/LpQ7Qt6Sep+uT6XwR4q97pu8Ij7h+NAuYk5tc9PeoSrqgQb694iSjk/4IYrMvt5FYtSoVcq8Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:23.049863Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.01049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b238711847ea7f5b308d92e601fa5425ca0d7514024ea05e8bbaf32aa748d86","sha256:7746efe2d842a00c746bcacaf30bcb6798a12ac4725c68227b650346866acbc1"],"state_sha256":"23502e513d38f59f3ec6d10b2e92b015a525059d20f4ff994d78288bc1ae5dce"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZYzCNKd5gYDTFI/F2S+v28IubqDtgniOZPwCIVZCbBN4/2sTaLgP9xHE/VBlHcP7/ZwckSvITIBx31418r2JBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T12:38:25.112304Z","bundle_sha256":"2b344296a642cf2f2ccaa3a79266fd0996b51aebf539bb91f4ae9ddd8d9cfd3c"}}