{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:QTIHCKJCW2PTLAN7HDFR6FBJND","short_pith_number":"pith:QTIHCKJC","canonical_record":{"source":{"id":"0810.1098","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T04:49:25Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"8b520fbb6f8ad412ea5cc21e0a3b8eb0506486eb80b520aebffb62b01873d992","abstract_canon_sha256":"1d457730c2c33eff109a132953a512d05144279f52e4bbfd96f3c9dbed3bbfaf"},"schema_version":"1.0"},"canonical_sha256":"84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4","source":{"kind":"arxiv","id":"0810.1098","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.1098","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"arxiv_version","alias_value":"0810.1098v2","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.1098","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"pith_short_12","alias_value":"QTIHCKJCW2PT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"QTIHCKJCW2PTLAN7","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"QTIHCKJC","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:QTIHCKJCW2PTLAN7HDFR6FBJND","target":"record","payload":{"canonical_record":{"source":{"id":"0810.1098","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T04:49:25Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"8b520fbb6f8ad412ea5cc21e0a3b8eb0506486eb80b520aebffb62b01873d992","abstract_canon_sha256":"1d457730c2c33eff109a132953a512d05144279f52e4bbfd96f3c9dbed3bbfaf"},"schema_version":"1.0"},"canonical_sha256":"84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:14.474839Z","signature_b64":"V/rvGApeaVLfhodiG+BTYz8SrREStRm0+eBLttyzJntfkc4yFB+liTZvAe4LympEsD/yA8ZwpS5GXS6ItT0SBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4","last_reissued_at":"2026-05-18T02:35:14.474403Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:14.474403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.1098","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":"2026-05-18T02:35:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AZxtGos2z22yq56lQ/SipwUl92JCS8xAElQj1qZLpcPHH2+K/F0gkWamn8lPIB3Ocv8l1qo62p276GovX/7SBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:43:14.788781Z"},"content_sha256":"4f6f8cf8b8079d4c011d6af90fca5234fa198478be001fb2737a64206b3dfefa","schema_version":"1.0","event_id":"sha256:4f6f8cf8b8079d4c011d6af90fca5234fa198478be001fb2737a64206b3dfefa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:QTIHCKJCW2PTLAN7HDFR6FBJND","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on the time variation of the fine structure constant by the 5-year WMAP data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph","authors_text":"Jun'ichi Yokoyama, Masahiro Nakashima, Ryo Nagata","submitted_at":"2008-10-07T04:49:25Z","abstract_excerpt":"The constraints on the time variation of the fine structure constant at recombination epoch relative to its present value, $\\Delta\\alpha/\\alpha \\equiv (\\alpha_{\\mathrm{rec}} - \\alpha_{\\mathrm{now}})/\\alpha_{\\mathrm{now}}$, are obtained from the analysis of the 5-year WMAP cosmic microwave background data. As a result of Markov-Chain Monte-Carlo analysis, it is found that, contrary to the analysis based on the previous WMAP data, the mean value of $\\Delta\\alpha/\\alpha=-0.0009$ does not change significantly whether we use the Hubble Space Telescope (HST) measurement of the Hubble parameter as a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.1098","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":"2026-05-18T02:35:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JxWOwo90YD+stMF6Y9ZlbkSYnsOWLq6ptQwynrrrk3yNka4QSmlMkGPxthmoSaLPxvMFoTIrqcLSaDqdNODYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:43:14.789467Z"},"content_sha256":"286029917f2d4069187368d88effe6b07c098cb4e52b36d2e2b488cd45944cb6","schema_version":"1.0","event_id":"sha256:286029917f2d4069187368d88effe6b07c098cb4e52b36d2e2b488cd45944cb6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/bundle.json","state_url":"https://pith.science/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/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":"2026-05-25T14:43:14Z","links":{"resolver":"https://pith.science/pith/QTIHCKJCW2PTLAN7HDFR6FBJND","bundle":"https://pith.science/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/bundle.json","state":"https://pith.science/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QTIHCKJCW2PTLAN7HDFR6FBJND/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:QTIHCKJCW2PTLAN7HDFR6FBJND","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":"1d457730c2c33eff109a132953a512d05144279f52e4bbfd96f3c9dbed3bbfaf","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T04:49:25Z","title_canon_sha256":"8b520fbb6f8ad412ea5cc21e0a3b8eb0506486eb80b520aebffb62b01873d992"},"schema_version":"1.0","source":{"id":"0810.1098","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.1098","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"arxiv_version","alias_value":"0810.1098v2","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.1098","created_at":"2026-05-18T02:35:14Z"},{"alias_kind":"pith_short_12","alias_value":"QTIHCKJCW2PT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"QTIHCKJCW2PTLAN7","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"QTIHCKJC","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:286029917f2d4069187368d88effe6b07c098cb4e52b36d2e2b488cd45944cb6","target":"graph","created_at":"2026-05-18T02:35:14Z","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":"The constraints on the time variation of the fine structure constant at recombination epoch relative to its present value, $\\Delta\\alpha/\\alpha \\equiv (\\alpha_{\\mathrm{rec}} - \\alpha_{\\mathrm{now}})/\\alpha_{\\mathrm{now}}$, are obtained from the analysis of the 5-year WMAP cosmic microwave background data. As a result of Markov-Chain Monte-Carlo analysis, it is found that, contrary to the analysis based on the previous WMAP data, the mean value of $\\Delta\\alpha/\\alpha=-0.0009$ does not change significantly whether we use the Hubble Space Telescope (HST) measurement of the Hubble parameter as a ","authors_text":"Jun'ichi Yokoyama, Masahiro Nakashima, Ryo Nagata","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T04:49:25Z","title":"Constraints on the time variation of the fine structure constant by the 5-year WMAP data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.1098","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":"sha256:4f6f8cf8b8079d4c011d6af90fca5234fa198478be001fb2737a64206b3dfefa","target":"record","created_at":"2026-05-18T02:35:14Z","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":"1d457730c2c33eff109a132953a512d05144279f52e4bbfd96f3c9dbed3bbfaf","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T04:49:25Z","title_canon_sha256":"8b520fbb6f8ad412ea5cc21e0a3b8eb0506486eb80b520aebffb62b01873d992"},"schema_version":"1.0","source":{"id":"0810.1098","kind":"arxiv","version":2}},"canonical_sha256":"84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4","first_computed_at":"2026-05-18T02:35:14.474403Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:14.474403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"V/rvGApeaVLfhodiG+BTYz8SrREStRm0+eBLttyzJntfkc4yFB+liTZvAe4LympEsD/yA8ZwpS5GXS6ItT0SBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:14.474839Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.1098","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f6f8cf8b8079d4c011d6af90fca5234fa198478be001fb2737a64206b3dfefa","sha256:286029917f2d4069187368d88effe6b07c098cb4e52b36d2e2b488cd45944cb6"],"state_sha256":"2dde97524576742ce83478f7b777ba42ecd92201db39567b9ccf7058de353ead"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Xwx4GV3q90/35hI58+SWnx1gwygbiz3oQyvhil5UeQ43QTXGAeJXEQZCWnIs/VOloKfOTXmb77klJeE2hpBCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T14:43:14.793157Z","bundle_sha256":"8300b7d4513439935e646dbb5e53b4ce9fda5c196b2d4b7f6d1d16d64f190630"}}