{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DRE6CZHJY5C5MWK5MO3SMOEKLZ","short_pith_number":"pith:DRE6CZHJ","canonical_record":{"source":{"id":"1902.08182","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-21T18:51:03Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c69a9e476756fdfdad33f3cc0e3a2e5cd5aa9e509c787cde38db22f404d088e0","abstract_canon_sha256":"d6d3624501aa701f5a87e390318d00fa66edffa5cbcf2539a87a2a84cb63e969"},"schema_version":"1.0"},"canonical_sha256":"1c49e164e9c745d6595d63b726388a5e5491f15706249386550118a681c1b291","source":{"kind":"arxiv","id":"1902.08182","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.08182","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1902.08182v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.08182","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"DRE6CZHJY5C5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DRE6CZHJY5C5MWK5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DRE6CZHJ","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DRE6CZHJY5C5MWK5MO3SMOEKLZ","target":"record","payload":{"canonical_record":{"source":{"id":"1902.08182","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-21T18:51:03Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c69a9e476756fdfdad33f3cc0e3a2e5cd5aa9e509c787cde38db22f404d088e0","abstract_canon_sha256":"d6d3624501aa701f5a87e390318d00fa66edffa5cbcf2539a87a2a84cb63e969"},"schema_version":"1.0"},"canonical_sha256":"1c49e164e9c745d6595d63b726388a5e5491f15706249386550118a681c1b291","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:25.969093Z","signature_b64":"2J6mf0gnn5SvisBgC8qMEjcC0iFm0JauGyKgaoOhp2RTmapCwjw84J8Ou+ozqCHDInxilHmIpMSWsIeh9ZteDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c49e164e9c745d6595d63b726388a5e5491f15706249386550118a681c1b291","last_reissued_at":"2026-05-17T23:47:25.968440Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:25.968440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.08182","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":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4hCdJv4LsNhxZQLkXlgurxKXxqgwNuo+TvcVVLU6Zawd72SiaGJ6wG/mIbpkwm/AdLZLRnD2wYcf3WsUpd1MDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:53:38.831304Z"},"content_sha256":"8b2960fc3624016f2d812162e8a0c195a474ac11ee9b7869009d7e91ccbad5b1","schema_version":"1.0","event_id":"sha256:8b2960fc3624016f2d812162e8a0c195a474ac11ee9b7869009d7e91ccbad5b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DRE6CZHJY5C5MWK5MO3SMOEKLZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Finding the Needle in a Haystack: Detrending Photometric Timeseries Data of Strictly Periodic Astrophysical Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Andrej Prsa, Mark Wells, Moses Zhang","submitted_at":"2019-02-21T18:51:03Z","abstract_excerpt":"Light curves of astrophysical objects frequently contain strictly periodic signals. In those cases we can use that property to aid the detrending algorithm to fully disentangle an unknown periodic signal and an unknown baseline signal with no power at that period. The periodic signal is modeled as a discrete probability distribution function (pdf), while the baseline signal is modeled as a residual timeseries. Those two components are disentangled by minimizing the length of the residual timeseries w.r.t. the per-bin pdf fluxes. We demonstrate the use of the algorithm on a synthetic case, on t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.08182","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":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LTTjb8vajWS1e7Xtu2LIEjIf+X9QZkftJdeMXHlO9tazKAR1akdGsCzeSdP9a1q4ucY/q5vJYScI6FFwbTJvCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:53:38.839621Z"},"content_sha256":"93d74fc890adc941ddfe42dd8953f8bc5a6a8c6b808b76d684a326c648fc12d5","schema_version":"1.0","event_id":"sha256:93d74fc890adc941ddfe42dd8953f8bc5a6a8c6b808b76d684a326c648fc12d5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/bundle.json","state_url":"https://pith.science/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/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":"2026-06-08T05:53:38Z","links":{"resolver":"https://pith.science/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ","bundle":"https://pith.science/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/bundle.json","state":"https://pith.science/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DRE6CZHJY5C5MWK5MO3SMOEKLZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DRE6CZHJY5C5MWK5MO3SMOEKLZ","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":"d6d3624501aa701f5a87e390318d00fa66edffa5cbcf2539a87a2a84cb63e969","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-21T18:51:03Z","title_canon_sha256":"c69a9e476756fdfdad33f3cc0e3a2e5cd5aa9e509c787cde38db22f404d088e0"},"schema_version":"1.0","source":{"id":"1902.08182","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.08182","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1902.08182v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.08182","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"DRE6CZHJY5C5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DRE6CZHJY5C5MWK5","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DRE6CZHJ","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:93d74fc890adc941ddfe42dd8953f8bc5a6a8c6b808b76d684a326c648fc12d5","target":"graph","created_at":"2026-05-17T23:47:25Z","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":"Light curves of astrophysical objects frequently contain strictly periodic signals. In those cases we can use that property to aid the detrending algorithm to fully disentangle an unknown periodic signal and an unknown baseline signal with no power at that period. The periodic signal is modeled as a discrete probability distribution function (pdf), while the baseline signal is modeled as a residual timeseries. Those two components are disentangled by minimizing the length of the residual timeseries w.r.t. the per-bin pdf fluxes. We demonstrate the use of the algorithm on a synthetic case, on t","authors_text":"Andrej Prsa, Mark Wells, Moses Zhang","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-21T18:51:03Z","title":"Finding the Needle in a Haystack: Detrending Photometric Timeseries Data of Strictly Periodic Astrophysical Objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.08182","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":"sha256:8b2960fc3624016f2d812162e8a0c195a474ac11ee9b7869009d7e91ccbad5b1","target":"record","created_at":"2026-05-17T23:47:25Z","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":"d6d3624501aa701f5a87e390318d00fa66edffa5cbcf2539a87a2a84cb63e969","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-21T18:51:03Z","title_canon_sha256":"c69a9e476756fdfdad33f3cc0e3a2e5cd5aa9e509c787cde38db22f404d088e0"},"schema_version":"1.0","source":{"id":"1902.08182","kind":"arxiv","version":1}},"canonical_sha256":"1c49e164e9c745d6595d63b726388a5e5491f15706249386550118a681c1b291","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c49e164e9c745d6595d63b726388a5e5491f15706249386550118a681c1b291","first_computed_at":"2026-05-17T23:47:25.968440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:25.968440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2J6mf0gnn5SvisBgC8qMEjcC0iFm0JauGyKgaoOhp2RTmapCwjw84J8Ou+ozqCHDInxilHmIpMSWsIeh9ZteDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:25.969093Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.08182","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b2960fc3624016f2d812162e8a0c195a474ac11ee9b7869009d7e91ccbad5b1","sha256:93d74fc890adc941ddfe42dd8953f8bc5a6a8c6b808b76d684a326c648fc12d5"],"state_sha256":"4ac77836f6368a45cffba9b5a461a4efd458cefb5ff19dc82121dcbb7e70de44"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sPZnzMB6gC88PdyymvVhn+ifj0kr9ffCFGYS5QOomi+2q06s3Ku5OgJgy4HUbxG6nv14jxxIv6ro/yu0pQnJCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T05:53:38.855433Z","bundle_sha256":"79657e89970aef0522543742712e521488c6c1171906dc1806e6fd53cc4c1ef2"}}