{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1993:BTGMVR4D57AGD7LECSYRZ3X54J","short_pith_number":"pith:BTGMVR4D","canonical_record":{"source":{"id":"astro-ph/9307027","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-16T21:03:34Z","cross_cats_sorted":[],"title_canon_sha256":"9d6b5fd42663f373e50d6d65a5c4451fb7cb71c0c3910245c27749afe22f3e54","abstract_canon_sha256":"1d55acd54a66b11b7bd4363ee59e57e5d2585a4a9c46131d74b2573f77fc34b9"},"schema_version":"1.0"},"canonical_sha256":"0ccccac783efc061fd6414b11ceefde27d081a0507522450e2e667e7a44540eb","source":{"kind":"arxiv","id":"astro-ph/9307027","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9307027","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9307027v1","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9307027","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"BTGMVR4D57AG","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_16","alias_value":"BTGMVR4D57AGD7LE","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_8","alias_value":"BTGMVR4D","created_at":"2026-07-04T15:55:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1993:BTGMVR4D57AGD7LECSYRZ3X54J","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9307027","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-16T21:03:34Z","cross_cats_sorted":[],"title_canon_sha256":"9d6b5fd42663f373e50d6d65a5c4451fb7cb71c0c3910245c27749afe22f3e54","abstract_canon_sha256":"1d55acd54a66b11b7bd4363ee59e57e5d2585a4a9c46131d74b2573f77fc34b9"},"schema_version":"1.0"},"canonical_sha256":"0ccccac783efc061fd6414b11ceefde27d081a0507522450e2e667e7a44540eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:55:07.129059Z","signature_b64":"MhCbNrqug4ziThMxqWIEOXroD0KGoGbUMra5SNMI2OUfgn7QnVoUtxGemZ6vKviOXQQiEAiOl/rEGfUtAe/FCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ccccac783efc061fd6414b11ceefde27d081a0507522450e2e667e7a44540eb","last_reissued_at":"2026-07-04T15:55:07.128628Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:55:07.128628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9307027","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":"2026-07-04T15:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"foB9H8uhMYxovqBw5txILUoNTK1dSKhGrtF5c3PLsjPy0G1t91YKWvlvPiU3Zax2yTR/HWgJrgFb2T+ggONABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T17:59:35.576180Z"},"content_sha256":"a2ecb01721bc1df30cee41a708af535cb9992cae97450feaf07972012c18ac01","schema_version":"1.0","event_id":"sha256:a2ecb01721bc1df30cee41a708af535cb9992cae97450feaf07972012c18ac01"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1993:BTGMVR4D57AGD7LECSYRZ3X54J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on Neutrino Oscillations from Big Bang Nucleosynethesis","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. D. Fields, D. N. Schramm, X. Shi","submitted_at":"1993-07-16T21:03:34Z","abstract_excerpt":"We discuss in detail the effect of neutrino oscillations in Big Bang nucleosynthesis, between active and sterile neutrinos, as well as between active and active neutrinos. We calculate the constraints on mixings between active and sterile neutrinos from the present observation of the primordial helium abundance and discuss the potential implications on various astrophysical and cosmological problems of such oscillations. In particular, we show that large angle sterile neutrino mixing seems to be excluded as a MSW solution to the solar neutrino situation or a solution to the atmospheric neutrin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9307027","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9307027/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IfkFdhVwiXRyM2GuBrzXZDGA48TJXpyrq58RByF3O8uFj/vEaNGrBOw5hC3LXb4WjRArQoo3vnIC+TLF66ADAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T17:59:35.576673Z"},"content_sha256":"511ce78b4271164d3c27c64fcf3880a8ab3197f877e48a65c3e78487a63c644d","schema_version":"1.0","event_id":"sha256:511ce78b4271164d3c27c64fcf3880a8ab3197f877e48a65c3e78487a63c644d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BTGMVR4D57AGD7LECSYRZ3X54J/bundle.json","state_url":"https://pith.science/pith/BTGMVR4D57AGD7LECSYRZ3X54J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BTGMVR4D57AGD7LECSYRZ3X54J/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":"2026-08-08T17:59:35Z","links":{"resolver":"https://pith.science/pith/BTGMVR4D57AGD7LECSYRZ3X54J","bundle":"https://pith.science/pith/BTGMVR4D57AGD7LECSYRZ3X54J/bundle.json","state":"https://pith.science/pith/BTGMVR4D57AGD7LECSYRZ3X54J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BTGMVR4D57AGD7LECSYRZ3X54J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1993:BTGMVR4D57AGD7LECSYRZ3X54J","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":"1d55acd54a66b11b7bd4363ee59e57e5d2585a4a9c46131d74b2573f77fc34b9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-16T21:03:34Z","title_canon_sha256":"9d6b5fd42663f373e50d6d65a5c4451fb7cb71c0c3910245c27749afe22f3e54"},"schema_version":"1.0","source":{"id":"astro-ph/9307027","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9307027","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9307027v1","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9307027","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"BTGMVR4D57AG","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_16","alias_value":"BTGMVR4D57AGD7LE","created_at":"2026-07-04T15:55:07Z"},{"alias_kind":"pith_short_8","alias_value":"BTGMVR4D","created_at":"2026-07-04T15:55:07Z"}],"graph_snapshots":[{"event_id":"sha256:511ce78b4271164d3c27c64fcf3880a8ab3197f877e48a65c3e78487a63c644d","target":"graph","created_at":"2026-07-04T15:55:07Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9307027/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss in detail the effect of neutrino oscillations in Big Bang nucleosynthesis, between active and sterile neutrinos, as well as between active and active neutrinos. We calculate the constraints on mixings between active and sterile neutrinos from the present observation of the primordial helium abundance and discuss the potential implications on various astrophysical and cosmological problems of such oscillations. In particular, we show that large angle sterile neutrino mixing seems to be excluded as a MSW solution to the solar neutrino situation or a solution to the atmospheric neutrin","authors_text":"B. D. Fields, D. N. Schramm, X. Shi","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1993-07-16T21:03:34Z","title":"Constraints on Neutrino Oscillations from Big Bang Nucleosynethesis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9307027","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:a2ecb01721bc1df30cee41a708af535cb9992cae97450feaf07972012c18ac01","target":"record","created_at":"2026-07-04T15:55:07Z","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":"1d55acd54a66b11b7bd4363ee59e57e5d2585a4a9c46131d74b2573f77fc34b9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-16T21:03:34Z","title_canon_sha256":"9d6b5fd42663f373e50d6d65a5c4451fb7cb71c0c3910245c27749afe22f3e54"},"schema_version":"1.0","source":{"id":"astro-ph/9307027","kind":"arxiv","version":1}},"canonical_sha256":"0ccccac783efc061fd6414b11ceefde27d081a0507522450e2e667e7a44540eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ccccac783efc061fd6414b11ceefde27d081a0507522450e2e667e7a44540eb","first_computed_at":"2026-07-04T15:55:07.128628Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:55:07.128628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MhCbNrqug4ziThMxqWIEOXroD0KGoGbUMra5SNMI2OUfgn7QnVoUtxGemZ6vKviOXQQiEAiOl/rEGfUtAe/FCg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:55:07.129059Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9307027","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2ecb01721bc1df30cee41a708af535cb9992cae97450feaf07972012c18ac01","sha256:511ce78b4271164d3c27c64fcf3880a8ab3197f877e48a65c3e78487a63c644d"],"state_sha256":"f937fcc5bf4b19c2f5c9405c35062be57ea3c80ef7b362d262bd6539a180377b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t1+C+v6K25FjbgCLAYGs8mjSR7SAMoes3NGf3X8S7olbLAFbefydZ++Y1Phkkta1Yfpk4P16/kdTkVDXxQOyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T17:59:35.581311Z","bundle_sha256":"bdd41c991f74f3de32d80a02db027de53d86a4717b62f63581fe2a41f684f4c2"}}