{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HKDVGG3GHRQ2VQCXCDR6L3SBSZ","short_pith_number":"pith:HKDVGG3G","canonical_record":{"source":{"id":"1612.06827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-20T20:11:10Z","cross_cats_sorted":[],"title_canon_sha256":"c2136bb65a1b9d7128d7e51e516d6890de4099637eb5f32ce032fb330ccfeed9","abstract_canon_sha256":"4b8ce30379dc67a463b4b8d3261dd7096b87c4bb3805db3861cda1b3363a57cb"},"schema_version":"1.0"},"canonical_sha256":"3a87531b663c61aac05710e3e5ee4196522b0db3ba1e3806ee9419aed481adb1","source":{"kind":"arxiv","id":"1612.06827","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.06827","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"arxiv_version","alias_value":"1612.06827v1","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.06827","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"pith_short_12","alias_value":"HKDVGG3GHRQ2","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HKDVGG3GHRQ2VQCX","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HKDVGG3G","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HKDVGG3GHRQ2VQCXCDR6L3SBSZ","target":"record","payload":{"canonical_record":{"source":{"id":"1612.06827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-20T20:11:10Z","cross_cats_sorted":[],"title_canon_sha256":"c2136bb65a1b9d7128d7e51e516d6890de4099637eb5f32ce032fb330ccfeed9","abstract_canon_sha256":"4b8ce30379dc67a463b4b8d3261dd7096b87c4bb3805db3861cda1b3363a57cb"},"schema_version":"1.0"},"canonical_sha256":"3a87531b663c61aac05710e3e5ee4196522b0db3ba1e3806ee9419aed481adb1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:46.786111Z","signature_b64":"rd3YxVm9PogX3UhQNMQq+W8fH69WDg7wbw9fQ7tPMpnB5xvAHxl49XRWLXVtW/G6ysXBDdEjLRu77geIRWqEBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a87531b663c61aac05710e3e5ee4196522b0db3ba1e3806ee9419aed481adb1","last_reissued_at":"2026-05-18T00:48:46.785513Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:46.785513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.06827","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":"2026-05-18T00:48:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iY7I7jQ+N3of0hgnV29vxfuf1xZRJ886t++UPOXOueVInSYdPugy9Ux/c0A2mNcX+3JvJNu/BdbfIHkq71QYBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T00:56:47.012803Z"},"content_sha256":"aeb74a0ccacf4d7ce0e9edbed6838914178644526757e6d629641895f9eb9943","schema_version":"1.0","event_id":"sha256:aeb74a0ccacf4d7ce0e9edbed6838914178644526757e6d629641895f9eb9943"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HKDVGG3GHRQ2VQCXCDR6L3SBSZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonradial and radial period changes of the Delta Scuti star 4 CVn II. Systematic behavior over 40 years","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Pamyatnykh, M. Breger, M. H. Montgomery, P. Lenz","submitted_at":"2016-12-20T20:11:10Z","abstract_excerpt":"Pulsators on and near the main sequence show period and amplitude changes that are too large to be the product of stellar evolution. The multiperiodic Delta Scuti stars are well suited to study these changes. This requires a very large amount of photometric data covering years and decades as well as mode identifications. We have examined over 800 nights of high-precision photometry of the multiperiodic pulsator 4 CVn obtained from 1966 through 2012. Because most of the data were obtained in adjacent observing seasons, it is possible to derive very accurate period values for a number of the exc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.06827","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":"2026-05-18T00:48:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qEuU1WLEuN0e3D05tqb52SF2bCJyhNsWHBhHYkeo/5IpmDbDeNvGFtVQPzMzgmCJmbdTJFS1zbf+jqqKV1lACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T00:56:47.013190Z"},"content_sha256":"053f3f380a467bbcfead5bb9bd7cb2458d4116cd6e3a626dee14b4b383ad5137","schema_version":"1.0","event_id":"sha256:053f3f380a467bbcfead5bb9bd7cb2458d4116cd6e3a626dee14b4b383ad5137"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/bundle.json","state_url":"https://pith.science/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/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":"2026-06-04T00:56:47Z","links":{"resolver":"https://pith.science/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ","bundle":"https://pith.science/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/bundle.json","state":"https://pith.science/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HKDVGG3GHRQ2VQCXCDR6L3SBSZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HKDVGG3GHRQ2VQCXCDR6L3SBSZ","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":"4b8ce30379dc67a463b4b8d3261dd7096b87c4bb3805db3861cda1b3363a57cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-20T20:11:10Z","title_canon_sha256":"c2136bb65a1b9d7128d7e51e516d6890de4099637eb5f32ce032fb330ccfeed9"},"schema_version":"1.0","source":{"id":"1612.06827","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.06827","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"arxiv_version","alias_value":"1612.06827v1","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.06827","created_at":"2026-05-18T00:48:46Z"},{"alias_kind":"pith_short_12","alias_value":"HKDVGG3GHRQ2","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HKDVGG3GHRQ2VQCX","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HKDVGG3G","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:053f3f380a467bbcfead5bb9bd7cb2458d4116cd6e3a626dee14b4b383ad5137","target":"graph","created_at":"2026-05-18T00:48:46Z","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":"Pulsators on and near the main sequence show period and amplitude changes that are too large to be the product of stellar evolution. The multiperiodic Delta Scuti stars are well suited to study these changes. This requires a very large amount of photometric data covering years and decades as well as mode identifications. We have examined over 800 nights of high-precision photometry of the multiperiodic pulsator 4 CVn obtained from 1966 through 2012. Because most of the data were obtained in adjacent observing seasons, it is possible to derive very accurate period values for a number of the exc","authors_text":"A. A. Pamyatnykh, M. Breger, M. H. Montgomery, P. Lenz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-20T20:11:10Z","title":"Nonradial and radial period changes of the Delta Scuti star 4 CVn II. Systematic behavior over 40 years"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.06827","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:aeb74a0ccacf4d7ce0e9edbed6838914178644526757e6d629641895f9eb9943","target":"record","created_at":"2026-05-18T00:48:46Z","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":"4b8ce30379dc67a463b4b8d3261dd7096b87c4bb3805db3861cda1b3363a57cb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-20T20:11:10Z","title_canon_sha256":"c2136bb65a1b9d7128d7e51e516d6890de4099637eb5f32ce032fb330ccfeed9"},"schema_version":"1.0","source":{"id":"1612.06827","kind":"arxiv","version":1}},"canonical_sha256":"3a87531b663c61aac05710e3e5ee4196522b0db3ba1e3806ee9419aed481adb1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a87531b663c61aac05710e3e5ee4196522b0db3ba1e3806ee9419aed481adb1","first_computed_at":"2026-05-18T00:48:46.785513Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:46.785513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rd3YxVm9PogX3UhQNMQq+W8fH69WDg7wbw9fQ7tPMpnB5xvAHxl49XRWLXVtW/G6ysXBDdEjLRu77geIRWqEBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:46.786111Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.06827","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aeb74a0ccacf4d7ce0e9edbed6838914178644526757e6d629641895f9eb9943","sha256:053f3f380a467bbcfead5bb9bd7cb2458d4116cd6e3a626dee14b4b383ad5137"],"state_sha256":"a9ffccf51c62a503fc398af89dd215045103ee0b5adf87cca94d66a3218cd0c3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xb/46IhG2gCIrOwwfA7pVeYqD3y8AVzzPAlNZyCEr21uzEBPm6mZgBoe1Foj1b9+I75wNPzwnQl12/GdJxNACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T00:56:47.016866Z","bundle_sha256":"fab10f73cc169ff02e6a4ffef6a428605a7a268d98dad9d297a4b87da2912467"}}