{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:XGRIVKJLX4F3QPAGMRMWCLUHTC","short_pith_number":"pith:XGRIVKJL","canonical_record":{"source":{"id":"1901.05384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-16T16:47:28Z","cross_cats_sorted":[],"title_canon_sha256":"e7a7ee17f88a94501e6d45702297fd28778484dd84c23f6719905c36d1559e3d","abstract_canon_sha256":"1ca9da6b4064f18eac04c8f9b48372408b4dfcb740cbdaaa51a15b27d748bb14"},"schema_version":"1.0"},"canonical_sha256":"b9a28aa92bbf0bb83c066459612e87988951d3daf9cc160f4234ffc3ad5c874e","source":{"kind":"arxiv","id":"1901.05384","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05384","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05384v1","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05384","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"pith_short_12","alias_value":"XGRIVKJLX4F3","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XGRIVKJLX4F3QPAG","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XGRIVKJL","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:XGRIVKJLX4F3QPAGMRMWCLUHTC","target":"record","payload":{"canonical_record":{"source":{"id":"1901.05384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-16T16:47:28Z","cross_cats_sorted":[],"title_canon_sha256":"e7a7ee17f88a94501e6d45702297fd28778484dd84c23f6719905c36d1559e3d","abstract_canon_sha256":"1ca9da6b4064f18eac04c8f9b48372408b4dfcb740cbdaaa51a15b27d748bb14"},"schema_version":"1.0"},"canonical_sha256":"b9a28aa92bbf0bb83c066459612e87988951d3daf9cc160f4234ffc3ad5c874e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:11.022025Z","signature_b64":"Yiqb2loNpw+1abQ1gjlkiGxkt0KbTlKvuSoKge8n7xUknLY7dUBhSGqH+4RksulXZhBWE4ugF9J/UQTd+InuAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9a28aa92bbf0bb83c066459612e87988951d3daf9cc160f4234ffc3ad5c874e","last_reissued_at":"2026-05-17T23:56:11.021323Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:11.021323Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.05384","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":"2026-05-17T23:56:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BKFoJncCnh7mguKO1jBhsLh4FTGtadELfmysjLUskuEOImARLYIeYTUgWrIbvdDlChtYLjQSb2m+kS31xQBuDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:56:18.373932Z"},"content_sha256":"9f31f1b4567d21b905c162ba62c6ed0b46648ecb7ea11ef254bbc3251a2fefc6","schema_version":"1.0","event_id":"sha256:9f31f1b4567d21b905c162ba62c6ed0b46648ecb7ea11ef254bbc3251a2fefc6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:XGRIVKJLX4F3QPAGMRMWCLUHTC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A wavelet analysis of photometric variability in Kepler white dwarf stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. D. da Costa, B. L. Canto Martins, D. B. de Freitas, I. C. Leao, J. P. Bravo, J. R. De Medeiros, S. R. de Lira","submitted_at":"2019-01-16T16:47:28Z","abstract_excerpt":"This work brings a wavelet analysis for 14 Kepler white dwarf stars, in order to confirm their photometric variability behavior and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in time-frequency domain rich in details, and so to obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behavior in ten white dwarfs, corresponding to period variations of ~ 2 h to 18 days: among "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05384","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":"2026-05-17T23:56:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yyx8+DJaArOEY0CWX6VSUUnIctK2vG7eW1jRMUlzuvYx/f9m9h/bTDXBkNSuS85IcJnwP4LMCmai46RBIxK5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:56:18.374379Z"},"content_sha256":"8716c68066a31768adf2914979c82938ac7949c1f0c712eb59ea0f1e6e6c96ab","schema_version":"1.0","event_id":"sha256:8716c68066a31768adf2914979c82938ac7949c1f0c712eb59ea0f1e6e6c96ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/bundle.json","state_url":"https://pith.science/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/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":"2026-05-25T19:56:18Z","links":{"resolver":"https://pith.science/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC","bundle":"https://pith.science/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/bundle.json","state":"https://pith.science/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XGRIVKJLX4F3QPAGMRMWCLUHTC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XGRIVKJLX4F3QPAGMRMWCLUHTC","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":"1ca9da6b4064f18eac04c8f9b48372408b4dfcb740cbdaaa51a15b27d748bb14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-16T16:47:28Z","title_canon_sha256":"e7a7ee17f88a94501e6d45702297fd28778484dd84c23f6719905c36d1559e3d"},"schema_version":"1.0","source":{"id":"1901.05384","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05384","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05384v1","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05384","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"pith_short_12","alias_value":"XGRIVKJLX4F3","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XGRIVKJLX4F3QPAG","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XGRIVKJL","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:8716c68066a31768adf2914979c82938ac7949c1f0c712eb59ea0f1e6e6c96ab","target":"graph","created_at":"2026-05-17T23:56:11Z","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":"This work brings a wavelet analysis for 14 Kepler white dwarf stars, in order to confirm their photometric variability behavior and to search for periodicities in these targets. From the observed Kepler light curves we obtained the wavelet local and global power spectra. Through this procedure, one can perform an analysis in time-frequency domain rich in details, and so to obtain a new perspective on the time evolution of the periodicities present in these stars. We identified a photometric variability behavior in ten white dwarfs, corresponding to period variations of ~ 2 h to 18 days: among ","authors_text":"A. D. da Costa, B. L. Canto Martins, D. B. de Freitas, I. C. Leao, J. P. Bravo, J. R. De Medeiros, S. R. de Lira","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-16T16:47:28Z","title":"A wavelet analysis of photometric variability in Kepler white dwarf stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05384","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":"sha256:9f31f1b4567d21b905c162ba62c6ed0b46648ecb7ea11ef254bbc3251a2fefc6","target":"record","created_at":"2026-05-17T23:56:11Z","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":"1ca9da6b4064f18eac04c8f9b48372408b4dfcb740cbdaaa51a15b27d748bb14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-16T16:47:28Z","title_canon_sha256":"e7a7ee17f88a94501e6d45702297fd28778484dd84c23f6719905c36d1559e3d"},"schema_version":"1.0","source":{"id":"1901.05384","kind":"arxiv","version":1}},"canonical_sha256":"b9a28aa92bbf0bb83c066459612e87988951d3daf9cc160f4234ffc3ad5c874e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9a28aa92bbf0bb83c066459612e87988951d3daf9cc160f4234ffc3ad5c874e","first_computed_at":"2026-05-17T23:56:11.021323Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:11.021323Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yiqb2loNpw+1abQ1gjlkiGxkt0KbTlKvuSoKge8n7xUknLY7dUBhSGqH+4RksulXZhBWE4ugF9J/UQTd+InuAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:11.022025Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05384","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f31f1b4567d21b905c162ba62c6ed0b46648ecb7ea11ef254bbc3251a2fefc6","sha256:8716c68066a31768adf2914979c82938ac7949c1f0c712eb59ea0f1e6e6c96ab"],"state_sha256":"d7296037ceb860e95c9dd1419d64698c12e24227442290a2ded7c3896da5079f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ci8r6MBYkeJrf/y5Bi9iPLP39AEQrfGsKcE9y7CEAfwCSTDkHaTau2Iiuk9Nlep5IVQyQUaKmKtkqlx9LflNDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:56:18.377803Z","bundle_sha256":"1c99d182341706fd69cfd1bd285e0cda30497fc7461503187a690127282858ac"}}