{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:UM2AUANRJBZQIC6OVJJTG67V2A","short_pith_number":"pith:UM2AUANR","canonical_record":{"source":{"id":"0907.4084","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-07-23T14:45:07Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"5b0f084bc615ef7c44e63224f2126ac350aabd54ae12133155077fd1c3f3d5dc","abstract_canon_sha256":"9a203c5fcdb8993711277ce67500805df5371f293bbc752325c178a6505f1f08"},"schema_version":"1.0"},"canonical_sha256":"a3340a01b14873040bceaa53337bf5d0038a7e1257e77b15b4979ef384ce0a77","source":{"kind":"arxiv","id":"0907.4084","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.4084","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.4084v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4084","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"UM2AUANRJBZQ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"UM2AUANRJBZQIC6O","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"UM2AUANR","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:UM2AUANRJBZQIC6OVJJTG67V2A","target":"record","payload":{"canonical_record":{"source":{"id":"0907.4084","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-07-23T14:45:07Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"5b0f084bc615ef7c44e63224f2126ac350aabd54ae12133155077fd1c3f3d5dc","abstract_canon_sha256":"9a203c5fcdb8993711277ce67500805df5371f293bbc752325c178a6505f1f08"},"schema_version":"1.0"},"canonical_sha256":"a3340a01b14873040bceaa53337bf5d0038a7e1257e77b15b4979ef384ce0a77","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:54.257648Z","signature_b64":"AfzW7DJw5hRc0Rd4GkIXwrzWNUYBVoHmdEKwj3Pf2lLaPE2IomqTACA1Oj/lXfBg9uAYgCHWGYQNvZm8kd3zAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a3340a01b14873040bceaa53337bf5d0038a7e1257e77b15b4979ef384ce0a77","last_reissued_at":"2026-05-18T02:12:54.257189Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:54.257189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.4084","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x/gfRfu66QFKXqQ0OQ8nAmi5GdU713T898MD5+yqLEHdq0RNAOeelXN0nL2+hxIlB37KWivd0ZBxwIfTeXWPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:35:27.814238Z"},"content_sha256":"42392ba6c29c18faf1b9c0f75ec050324b31820f8b0deeedf9a4d935360ad11a","schema_version":"1.0","event_id":"sha256:42392ba6c29c18faf1b9c0f75ec050324b31820f8b0deeedf9a4d935360ad11a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:UM2AUANRJBZQIC6OVJJTG67V2A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detecting short period variable stars with Gaia","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"D. Koester, L. Eyer, M. Varadi, N. Mowlavi, S. Jordan","submitted_at":"2009-07-23T14:45:07Z","abstract_excerpt":"We analyzed the frequency domain of time series of simulated ZZ Ceti light-curves to investigate the detectability and period recovery performance of short period variables (periods < 2 hours) for the Gaia mission. In our analysis, first we used a non-linear ZZ Ceti light-curves simulator code to simulate the variability of ZZ Ceti stars (we assumed stationary power spectra over five years). Second we used the Gaia nominal scanning law and the expected photometric precision of Gaia to simulate ZZ Ceti time series with Gaia's time sampling and photometric errors. Then we performed a Fourier ana"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4084","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HObMiG1SZFbfFBzonFIobWuBdjoOsaFPh9DWEq8I6J1/kJD59x+Oto1JJVqK0kVskWuf+I1BKujuaryty1ZxAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:35:27.814740Z"},"content_sha256":"b75b116bec5bf7f60b305f188bab9ab9453644359ce691634f3dd516d5ac872e","schema_version":"1.0","event_id":"sha256:b75b116bec5bf7f60b305f188bab9ab9453644359ce691634f3dd516d5ac872e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UM2AUANRJBZQIC6OVJJTG67V2A/bundle.json","state_url":"https://pith.science/pith/UM2AUANRJBZQIC6OVJJTG67V2A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UM2AUANRJBZQIC6OVJJTG67V2A/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":"2026-05-29T16:35:27Z","links":{"resolver":"https://pith.science/pith/UM2AUANRJBZQIC6OVJJTG67V2A","bundle":"https://pith.science/pith/UM2AUANRJBZQIC6OVJJTG67V2A/bundle.json","state":"https://pith.science/pith/UM2AUANRJBZQIC6OVJJTG67V2A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UM2AUANRJBZQIC6OVJJTG67V2A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:UM2AUANRJBZQIC6OVJJTG67V2A","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":"9a203c5fcdb8993711277ce67500805df5371f293bbc752325c178a6505f1f08","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-07-23T14:45:07Z","title_canon_sha256":"5b0f084bc615ef7c44e63224f2126ac350aabd54ae12133155077fd1c3f3d5dc"},"schema_version":"1.0","source":{"id":"0907.4084","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.4084","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.4084v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4084","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"UM2AUANRJBZQ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"UM2AUANRJBZQIC6O","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"UM2AUANR","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:b75b116bec5bf7f60b305f188bab9ab9453644359ce691634f3dd516d5ac872e","target":"graph","created_at":"2026-05-18T02:12:54Z","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 analyzed the frequency domain of time series of simulated ZZ Ceti light-curves to investigate the detectability and period recovery performance of short period variables (periods < 2 hours) for the Gaia mission. In our analysis, first we used a non-linear ZZ Ceti light-curves simulator code to simulate the variability of ZZ Ceti stars (we assumed stationary power spectra over five years). Second we used the Gaia nominal scanning law and the expected photometric precision of Gaia to simulate ZZ Ceti time series with Gaia's time sampling and photometric errors. Then we performed a Fourier ana","authors_text":"D. Koester, L. Eyer, M. Varadi, N. Mowlavi, S. Jordan","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-07-23T14:45:07Z","title":"Detecting short period variable stars with Gaia"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4084","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":"sha256:42392ba6c29c18faf1b9c0f75ec050324b31820f8b0deeedf9a4d935360ad11a","target":"record","created_at":"2026-05-18T02:12:54Z","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":"9a203c5fcdb8993711277ce67500805df5371f293bbc752325c178a6505f1f08","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-07-23T14:45:07Z","title_canon_sha256":"5b0f084bc615ef7c44e63224f2126ac350aabd54ae12133155077fd1c3f3d5dc"},"schema_version":"1.0","source":{"id":"0907.4084","kind":"arxiv","version":1}},"canonical_sha256":"a3340a01b14873040bceaa53337bf5d0038a7e1257e77b15b4979ef384ce0a77","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a3340a01b14873040bceaa53337bf5d0038a7e1257e77b15b4979ef384ce0a77","first_computed_at":"2026-05-18T02:12:54.257189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:54.257189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AfzW7DJw5hRc0Rd4GkIXwrzWNUYBVoHmdEKwj3Pf2lLaPE2IomqTACA1Oj/lXfBg9uAYgCHWGYQNvZm8kd3zAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:54.257648Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.4084","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42392ba6c29c18faf1b9c0f75ec050324b31820f8b0deeedf9a4d935360ad11a","sha256:b75b116bec5bf7f60b305f188bab9ab9453644359ce691634f3dd516d5ac872e"],"state_sha256":"4135b1ec163ca104c1fb1ba690fbf6e1e6d9e708063e0609fa700d97f34e678a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5zYMrcQxgrd/6JjlBZymBcwLgV1TOUl5lIzv7sqE2WLsQZVQRL8KrxpxQdiKfUj5XBMJYQviRgYw7vmIoP/BCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T16:35:27.818066Z","bundle_sha256":"b489ee0b7d21e40b65ec02ffc70ac4936fcd805ce67e64158a44df98960b92c3"}}