{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XUHZEP22ISJRI3J54QFFNT2DZV","short_pith_number":"pith:XUHZEP22","canonical_record":{"source":{"id":"1703.10334","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-30T07:07:21Z","cross_cats_sorted":[],"title_canon_sha256":"6220ad055c4ebf1dbc1da7d7ab32a390bca46b940303ed4e20816806eec9b128","abstract_canon_sha256":"a3b0c7aeacc4c6170758a65c06ea6761e3ec4b465f328968926f02db661c8700"},"schema_version":"1.0"},"canonical_sha256":"bd0f923f5a4493146d3de40a56cf43cd76525185c7ca868ce0f07b7e279e7169","source":{"kind":"arxiv","id":"1703.10334","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10334","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10334v1","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10334","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"pith_short_12","alias_value":"XUHZEP22ISJR","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XUHZEP22ISJRI3J5","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XUHZEP22","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XUHZEP22ISJRI3J54QFFNT2DZV","target":"record","payload":{"canonical_record":{"source":{"id":"1703.10334","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-30T07:07:21Z","cross_cats_sorted":[],"title_canon_sha256":"6220ad055c4ebf1dbc1da7d7ab32a390bca46b940303ed4e20816806eec9b128","abstract_canon_sha256":"a3b0c7aeacc4c6170758a65c06ea6761e3ec4b465f328968926f02db661c8700"},"schema_version":"1.0"},"canonical_sha256":"bd0f923f5a4493146d3de40a56cf43cd76525185c7ca868ce0f07b7e279e7169","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:07.086619Z","signature_b64":"ziatHFYNbgF6MwlnyAX1z0DN7KAXcae+1B3FlsdqTlMs117/Tl9q7vhKureyVHbNV42dUPcVNg3Hp89m2csaAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd0f923f5a4493146d3de40a56cf43cd76525185c7ca868ce0f07b7e279e7169","last_reissued_at":"2026-05-18T00:20:07.085981Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:07.085981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.10334","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":"2026-05-18T00:20:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uR1yaFSpUzlvgZd1nhEBjrExqZZqXjc8YJS6wEp0hDkh59p8LGsS4Db+hMdu++dgL+x6EpJlUJ+9o8q311N1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:16:30.432278Z"},"content_sha256":"72a5fa98d525e4520bd510b71ed5853532c1a4284dc9177d908d038e71310f1f","schema_version":"1.0","event_id":"sha256:72a5fa98d525e4520bd510b71ed5853532c1a4284dc9177d908d038e71310f1f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XUHZEP22ISJRI3J54QFFNT2DZV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Investigating Light Curve Modulation via Kernel Smoothing. I. Application to 53 fundamental mode and first-overtone Cepheids in the LMC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Maria S\\\"uveges, Richard Anderson","submitted_at":"2017-03-30T07:07:21Z","abstract_excerpt":"Recent studies have revealed a hitherto unknown complexity of Cepheid pulsation. We implement local kernel regression to search for both period and amplitude modulations simultaneously in continuous time and to investigate their detectability, and test this new method on 53 classical Cepheids from the OGLE-III catalog. We determine confidence intervals using parametric and non-parametric bootstrap sampling to estimate significance and investigate multi-periodicity using a modified pre-whitening approach that relies on time-dependent light curve parameters. We find a wide variety of period and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10334","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":"2026-05-18T00:20:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZvAwvYUlsxO1/WvWPc52u9iwBq0If3tKATHWmw47BY/N3HuaXrbHNQko3rTjnh9JUC7QcrJKoaCMGyQKLIxuCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:16:30.432995Z"},"content_sha256":"288fe9cb31f91fbabf285e2687722a706a8f9ae53697e8403d6e7ef940322221","schema_version":"1.0","event_id":"sha256:288fe9cb31f91fbabf285e2687722a706a8f9ae53697e8403d6e7ef940322221"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XUHZEP22ISJRI3J54QFFNT2DZV/bundle.json","state_url":"https://pith.science/pith/XUHZEP22ISJRI3J54QFFNT2DZV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XUHZEP22ISJRI3J54QFFNT2DZV/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":"2026-06-11T05:16:30Z","links":{"resolver":"https://pith.science/pith/XUHZEP22ISJRI3J54QFFNT2DZV","bundle":"https://pith.science/pith/XUHZEP22ISJRI3J54QFFNT2DZV/bundle.json","state":"https://pith.science/pith/XUHZEP22ISJRI3J54QFFNT2DZV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XUHZEP22ISJRI3J54QFFNT2DZV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XUHZEP22ISJRI3J54QFFNT2DZV","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":"a3b0c7aeacc4c6170758a65c06ea6761e3ec4b465f328968926f02db661c8700","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-30T07:07:21Z","title_canon_sha256":"6220ad055c4ebf1dbc1da7d7ab32a390bca46b940303ed4e20816806eec9b128"},"schema_version":"1.0","source":{"id":"1703.10334","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10334","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10334v1","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10334","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"pith_short_12","alias_value":"XUHZEP22ISJR","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XUHZEP22ISJRI3J5","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XUHZEP22","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:288fe9cb31f91fbabf285e2687722a706a8f9ae53697e8403d6e7ef940322221","target":"graph","created_at":"2026-05-18T00:20:07Z","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":"Recent studies have revealed a hitherto unknown complexity of Cepheid pulsation. We implement local kernel regression to search for both period and amplitude modulations simultaneously in continuous time and to investigate their detectability, and test this new method on 53 classical Cepheids from the OGLE-III catalog. We determine confidence intervals using parametric and non-parametric bootstrap sampling to estimate significance and investigate multi-periodicity using a modified pre-whitening approach that relies on time-dependent light curve parameters. We find a wide variety of period and ","authors_text":"Maria S\\\"uveges, Richard Anderson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-30T07:07:21Z","title":"Investigating Light Curve Modulation via Kernel Smoothing. I. Application to 53 fundamental mode and first-overtone Cepheids in the LMC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10334","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":"sha256:72a5fa98d525e4520bd510b71ed5853532c1a4284dc9177d908d038e71310f1f","target":"record","created_at":"2026-05-18T00:20:07Z","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":"a3b0c7aeacc4c6170758a65c06ea6761e3ec4b465f328968926f02db661c8700","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-30T07:07:21Z","title_canon_sha256":"6220ad055c4ebf1dbc1da7d7ab32a390bca46b940303ed4e20816806eec9b128"},"schema_version":"1.0","source":{"id":"1703.10334","kind":"arxiv","version":1}},"canonical_sha256":"bd0f923f5a4493146d3de40a56cf43cd76525185c7ca868ce0f07b7e279e7169","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd0f923f5a4493146d3de40a56cf43cd76525185c7ca868ce0f07b7e279e7169","first_computed_at":"2026-05-18T00:20:07.085981Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:07.085981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ziatHFYNbgF6MwlnyAX1z0DN7KAXcae+1B3FlsdqTlMs117/Tl9q7vhKureyVHbNV42dUPcVNg3Hp89m2csaAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:07.086619Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.10334","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72a5fa98d525e4520bd510b71ed5853532c1a4284dc9177d908d038e71310f1f","sha256:288fe9cb31f91fbabf285e2687722a706a8f9ae53697e8403d6e7ef940322221"],"state_sha256":"c5ef30f868b739fe9f33539d089cb54e85f58fa4041e207c33681eea4238edbb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KZX2LMxR/y6DE59fCt/BP6nvX22eOXEaZyEmhaZrErpyHcKDRZRZRpiCtM/2zkaSqSq21F4etg7hzrq4Dcq+AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T05:16:30.436775Z","bundle_sha256":"b5fb38f9e399115eb1e8a2467d6d5a3ccd9dbdba07dc1528332dd13d611850cd"}}