{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ZY675KTY6C5ZKAOJYIUJZO7UB3","short_pith_number":"pith:ZY675KTY","canonical_record":{"source":{"id":"1702.01757","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-02-06T19:00:03Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"805ad78213a0f242404c74a3c0f179d5bfd84086bcf1e94e3961d1b3a3aef59b","abstract_canon_sha256":"89679ea53a1e273d49d7bca172a9acd66ade74c7ecbc6e98638207592b516de4"},"schema_version":"1.0"},"canonical_sha256":"ce3dfeaa78f0bb9501c9c2289cbbf40ecf10e48783e7cd1ab8d96fa7b4943702","source":{"kind":"arxiv","id":"1702.01757","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.01757","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"arxiv_version","alias_value":"1702.01757v2","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.01757","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"pith_short_12","alias_value":"ZY675KTY6C5Z","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZY675KTY6C5ZKAOJ","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZY675KTY","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ZY675KTY6C5ZKAOJYIUJZO7UB3","target":"record","payload":{"canonical_record":{"source":{"id":"1702.01757","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-02-06T19:00:03Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"805ad78213a0f242404c74a3c0f179d5bfd84086bcf1e94e3961d1b3a3aef59b","abstract_canon_sha256":"89679ea53a1e273d49d7bca172a9acd66ade74c7ecbc6e98638207592b516de4"},"schema_version":"1.0"},"canonical_sha256":"ce3dfeaa78f0bb9501c9c2289cbbf40ecf10e48783e7cd1ab8d96fa7b4943702","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:59.095947Z","signature_b64":"eaz9LosegxVLSvgh61cDQO60XKHxljDoGAjnZjZNItVAIzENc9rctUhW+anFJ7w0ugB4jdf/uQqmh00iBzL0AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce3dfeaa78f0bb9501c9c2289cbbf40ecf10e48783e7cd1ab8d96fa7b4943702","last_reissued_at":"2026-05-18T00:46:59.095122Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:59.095122Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.01757","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:46:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uWBLilyMAVutQ9izX8h+CgJJtvd5LOVRbfFmtob2EroCfR92g1/DYwZ/8mSj3ThvaBVQKQQwafEqhJgBZhu7Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:00:03.546654Z"},"content_sha256":"ab3ad571c1c0f715bdcd62cd4c6b0059bcb69b70eb2bdff83d504e879a123ff2","schema_version":"1.0","event_id":"sha256:ab3ad571c1c0f715bdcd62cd4c6b0059bcb69b70eb2bdff83d504e879a123ff2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ZY675KTY6C5ZKAOJYIUJZO7UB3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Jay B. Holberg, Jiting Hu, John D. Barrow, John K. Webb, Julian C. Berengut, Martin A. Barstow, Matthew B. Bainbridge, Nicole Reindl, Simon P. Preval, Thomas R. Ayres, Victor V. Flambaum, Vincent Dumont, Vladimir A. Dzuba, Wim Ubachs, W.-\\\"U Lydia Tchang-Brillet","submitted_at":"2017-02-06T19:00:03Z","abstract_excerpt":"Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct observational test. We study a sample of hot white dwarf stars, combining far-UV spectroscopic observations, atomic physics, atmospheric modelling and fundamental physics, in the search for variation in the fine structure constant. This variation manifests as shifts in the observed wavelengths of absorption lines, such as quadruply ionized iron (FeV) and quadruply ionized nickel (NiV), when compared to laboratory wavelen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.01757","kind":"arxiv","version":2},"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":"2026-05-18T00:46:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f3e1i+HCqPgUH0sgyRb6XI0xKZJdvucFZwrYggzh6DBZloLfstie9TpWT1bXSRMW5qg2P7rmBkx7Pc5Tqt7LAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:00:03.547013Z"},"content_sha256":"9f020421c153e5714a5e0669f1580f26e5c91dbc493a917e1a42dc18c18f066c","schema_version":"1.0","event_id":"sha256:9f020421c153e5714a5e0669f1580f26e5c91dbc493a917e1a42dc18c18f066c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/bundle.json","state_url":"https://pith.science/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/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":"2026-05-28T06:00:03Z","links":{"resolver":"https://pith.science/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3","bundle":"https://pith.science/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/bundle.json","state":"https://pith.science/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZY675KTY6C5ZKAOJYIUJZO7UB3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZY675KTY6C5ZKAOJYIUJZO7UB3","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":"89679ea53a1e273d49d7bca172a9acd66ade74c7ecbc6e98638207592b516de4","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-02-06T19:00:03Z","title_canon_sha256":"805ad78213a0f242404c74a3c0f179d5bfd84086bcf1e94e3961d1b3a3aef59b"},"schema_version":"1.0","source":{"id":"1702.01757","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.01757","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"arxiv_version","alias_value":"1702.01757v2","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.01757","created_at":"2026-05-18T00:46:59Z"},{"alias_kind":"pith_short_12","alias_value":"ZY675KTY6C5Z","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZY675KTY6C5ZKAOJ","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZY675KTY","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:9f020421c153e5714a5e0669f1580f26e5c91dbc493a917e1a42dc18c18f066c","target":"graph","created_at":"2026-05-18T00:46:59Z","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":"Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct observational test. We study a sample of hot white dwarf stars, combining far-UV spectroscopic observations, atomic physics, atmospheric modelling and fundamental physics, in the search for variation in the fine structure constant. This variation manifests as shifts in the observed wavelengths of absorption lines, such as quadruply ionized iron (FeV) and quadruply ionized nickel (NiV), when compared to laboratory wavelen","authors_text":"Jay B. Holberg, Jiting Hu, John D. Barrow, John K. Webb, Julian C. Berengut, Martin A. Barstow, Matthew B. Bainbridge, Nicole Reindl, Simon P. Preval, Thomas R. Ayres, Victor V. Flambaum, Vincent Dumont, Vladimir A. Dzuba, Wim Ubachs, W.-\\\"U Lydia Tchang-Brillet","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-02-06T19:00:03Z","title":"Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.01757","kind":"arxiv","version":2},"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:ab3ad571c1c0f715bdcd62cd4c6b0059bcb69b70eb2bdff83d504e879a123ff2","target":"record","created_at":"2026-05-18T00:46:59Z","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":"89679ea53a1e273d49d7bca172a9acd66ade74c7ecbc6e98638207592b516de4","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-02-06T19:00:03Z","title_canon_sha256":"805ad78213a0f242404c74a3c0f179d5bfd84086bcf1e94e3961d1b3a3aef59b"},"schema_version":"1.0","source":{"id":"1702.01757","kind":"arxiv","version":2}},"canonical_sha256":"ce3dfeaa78f0bb9501c9c2289cbbf40ecf10e48783e7cd1ab8d96fa7b4943702","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce3dfeaa78f0bb9501c9c2289cbbf40ecf10e48783e7cd1ab8d96fa7b4943702","first_computed_at":"2026-05-18T00:46:59.095122Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:59.095122Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eaz9LosegxVLSvgh61cDQO60XKHxljDoGAjnZjZNItVAIzENc9rctUhW+anFJ7w0ugB4jdf/uQqmh00iBzL0AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:59.095947Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.01757","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab3ad571c1c0f715bdcd62cd4c6b0059bcb69b70eb2bdff83d504e879a123ff2","sha256:9f020421c153e5714a5e0669f1580f26e5c91dbc493a917e1a42dc18c18f066c"],"state_sha256":"83a1e4df6b5276966170cd0d47bec19ab4f9dbcf698d6371dad12eba552590a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xsW2wF8itsRJaGQ9DUPgwXn2DIjYKb2Tbu35fMBsY2NF/tvxAHAncWgGtOlah73yGFp/FABocspQpSVOa1VyAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:00:03.549013Z","bundle_sha256":"1c6346da188d377ef0588d4d2643e41251e217c8b581c7a67e644c70dec44ac7"}}