{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:NGNB3YWPUWNGEXFW4H4HQ6Z62T","short_pith_number":"pith:NGNB3YWP","canonical_record":{"source":{"id":"0810.0476","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-02T16:37:17Z","cross_cats_sorted":[],"title_canon_sha256":"266c35bc3884c0d1b244924e0974debb2359e3b0808c030451d5ad7568099d5e","abstract_canon_sha256":"0b7bdfd1be27726d26d0347ed33d68171c6d4ced0cb5bf41bd9a0ad2b05f3b52"},"schema_version":"1.0"},"canonical_sha256":"699a1de2cfa59a625cb6e1f8787b3ed4ee62b0233a6fa3982b61f67512bef2be","source":{"kind":"arxiv","id":"0810.0476","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.0476","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"0810.0476v2","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.0476","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"NGNB3YWPUWNG","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_16","alias_value":"NGNB3YWPUWNGEXFW","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_8","alias_value":"NGNB3YWP","created_at":"2026-07-04T15:15:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:NGNB3YWPUWNGEXFW4H4HQ6Z62T","target":"record","payload":{"canonical_record":{"source":{"id":"0810.0476","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-02T16:37:17Z","cross_cats_sorted":[],"title_canon_sha256":"266c35bc3884c0d1b244924e0974debb2359e3b0808c030451d5ad7568099d5e","abstract_canon_sha256":"0b7bdfd1be27726d26d0347ed33d68171c6d4ced0cb5bf41bd9a0ad2b05f3b52"},"schema_version":"1.0"},"canonical_sha256":"699a1de2cfa59a625cb6e1f8787b3ed4ee62b0233a6fa3982b61f67512bef2be","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:15:42.649976Z","signature_b64":"bQuYYfQO/UYAgPvpH1ytdGFkaHg30zvS1beYzbXBUyXuFPrOjdXf8+DsAYSDYMZgCpNxWd4wW273WmJZwrQhBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"699a1de2cfa59a625cb6e1f8787b3ed4ee62b0233a6fa3982b61f67512bef2be","last_reissued_at":"2026-07-04T15:15:42.649562Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:15:42.649562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.0476","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O15YPhGw9tKTguoiGpCHFVwlAaoVbq3H0QqHnxRVgTUuWInmg9ikihcNIuS8SoRCYrGwC5FMSb+QiESHDkX0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T04:38:48.011693Z"},"content_sha256":"da154df1aa2e682221d76f9a81ba7e4dfa0bd6bfeae1d8268e15f205aee81952","schema_version":"1.0","event_id":"sha256:da154df1aa2e682221d76f9a81ba7e4dfa0bd6bfeae1d8268e15f205aee81952"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:NGNB3YWPUWNGEXFW4H4HQ6Z62T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the nature of HD 207331: a new Delta Scuti variable","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Zurita, J.L. Ochoa, J.S. Silva, L. Fox Machado, W.J. Schuster","submitted_at":"2008-10-02T16:37:17Z","abstract_excerpt":"While testing a Stromgren spectrophotometer attached to the 1.5-m telescope at the San Pedro Martir observatory, Mexico, a number of A-type stars were observed, one of which, HD 207331, presented clear indications of photometric variability. CCD photometric data acquired soon after, confirmed its variability. In order to determine its pulsation behaviour more accurately, uvby differential photoelectric photometry was carried out for three nights. As a result of the period analysis of the light curves we have found a dominant pulsation mode at 21.1 c/d with an amplitude of 6 mmag. This strongly"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.0476","kind":"arxiv","version":2},"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/0810.0476/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":"2026-07-04T15:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0ftMnmd6Gfd4BHHaYJPUH2Id6zlqs5J+RPQKutCUNueMxaxQ6cMtTE8ScNGLJLSEXTXFC/u7z8tFTCeVDIxuAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T04:38:48.012060Z"},"content_sha256":"8a80ce762c3d018411c2bb9c89b56adbe1ac908e59e5f4e1594a9fc5e4263cee","schema_version":"1.0","event_id":"sha256:8a80ce762c3d018411c2bb9c89b56adbe1ac908e59e5f4e1594a9fc5e4263cee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/bundle.json","state_url":"https://pith.science/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/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":"2026-07-05T04:38:48Z","links":{"resolver":"https://pith.science/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T","bundle":"https://pith.science/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/bundle.json","state":"https://pith.science/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NGNB3YWPUWNGEXFW4H4HQ6Z62T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:NGNB3YWPUWNGEXFW4H4HQ6Z62T","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":"0b7bdfd1be27726d26d0347ed33d68171c6d4ced0cb5bf41bd9a0ad2b05f3b52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-02T16:37:17Z","title_canon_sha256":"266c35bc3884c0d1b244924e0974debb2359e3b0808c030451d5ad7568099d5e"},"schema_version":"1.0","source":{"id":"0810.0476","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.0476","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"0810.0476v2","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.0476","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"NGNB3YWPUWNG","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_16","alias_value":"NGNB3YWPUWNGEXFW","created_at":"2026-07-04T15:15:42Z"},{"alias_kind":"pith_short_8","alias_value":"NGNB3YWP","created_at":"2026-07-04T15:15:42Z"}],"graph_snapshots":[{"event_id":"sha256:8a80ce762c3d018411c2bb9c89b56adbe1ac908e59e5f4e1594a9fc5e4263cee","target":"graph","created_at":"2026-07-04T15:15:42Z","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/0810.0476/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"While testing a Stromgren spectrophotometer attached to the 1.5-m telescope at the San Pedro Martir observatory, Mexico, a number of A-type stars were observed, one of which, HD 207331, presented clear indications of photometric variability. CCD photometric data acquired soon after, confirmed its variability. In order to determine its pulsation behaviour more accurately, uvby differential photoelectric photometry was carried out for three nights. As a result of the period analysis of the light curves we have found a dominant pulsation mode at 21.1 c/d with an amplitude of 6 mmag. This strongly","authors_text":"C. Zurita, J.L. Ochoa, J.S. Silva, L. Fox Machado, W.J. Schuster","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-02T16:37:17Z","title":"On the nature of HD 207331: a new Delta Scuti variable"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.0476","kind":"arxiv","version":2},"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:da154df1aa2e682221d76f9a81ba7e4dfa0bd6bfeae1d8268e15f205aee81952","target":"record","created_at":"2026-07-04T15:15:42Z","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":"0b7bdfd1be27726d26d0347ed33d68171c6d4ced0cb5bf41bd9a0ad2b05f3b52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-02T16:37:17Z","title_canon_sha256":"266c35bc3884c0d1b244924e0974debb2359e3b0808c030451d5ad7568099d5e"},"schema_version":"1.0","source":{"id":"0810.0476","kind":"arxiv","version":2}},"canonical_sha256":"699a1de2cfa59a625cb6e1f8787b3ed4ee62b0233a6fa3982b61f67512bef2be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"699a1de2cfa59a625cb6e1f8787b3ed4ee62b0233a6fa3982b61f67512bef2be","first_computed_at":"2026-07-04T15:15:42.649562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:15:42.649562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bQuYYfQO/UYAgPvpH1ytdGFkaHg30zvS1beYzbXBUyXuFPrOjdXf8+DsAYSDYMZgCpNxWd4wW273WmJZwrQhBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:15:42.649976Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.0476","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da154df1aa2e682221d76f9a81ba7e4dfa0bd6bfeae1d8268e15f205aee81952","sha256:8a80ce762c3d018411c2bb9c89b56adbe1ac908e59e5f4e1594a9fc5e4263cee"],"state_sha256":"0ba122a7c5ddc83a2beeaa7c53ac02118cdb68f8a9a5be42a5a067005c0a8ca5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TZvj7tYpOV7weRY/EsmBpLfLL4ftzvZIY0QzyH2klbI3m9ZETsR+fyX41mNc29vn8aQlY6aLv0QIxLEz4mEADg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T04:38:48.014002Z","bundle_sha256":"884d1308b46992d68ff81b333c1a97eae890f7f43a735f87b86723302a15621c"}}