{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:JNOIKSQPNXYCTYOM6UHPSXVUOP","short_pith_number":"pith:JNOIKSQP","canonical_record":{"source":{"id":"astro-ph/9912391","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-12-17T20:41:46Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"491d2ad9fa49399222e0ce4fbb7aca091a675bbc83e8802c5d08ac004d3ff26b","abstract_canon_sha256":"48a065d18eaefb00377bfb94b139288ff18a513cdab5214d4d2dadf2f2512767"},"schema_version":"1.0"},"canonical_sha256":"4b5c854a0f6df029e1ccf50ef95eb473d3fb32a8a5e46cca510782021b2af975","source":{"kind":"arxiv","id":"astro-ph/9912391","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9912391","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9912391v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9912391","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"JNOIKSQPNXYC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"JNOIKSQPNXYCTYOM","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"JNOIKSQP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:JNOIKSQPNXYCTYOM6UHPSXVUOP","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9912391","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-12-17T20:41:46Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"491d2ad9fa49399222e0ce4fbb7aca091a675bbc83e8802c5d08ac004d3ff26b","abstract_canon_sha256":"48a065d18eaefb00377bfb94b139288ff18a513cdab5214d4d2dadf2f2512767"},"schema_version":"1.0"},"canonical_sha256":"4b5c854a0f6df029e1ccf50ef95eb473d3fb32a8a5e46cca510782021b2af975","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:00.356215Z","signature_b64":"uwbfCHJOo2VRJo/5XdrvVAlPRdwVfzhEFuGXwchyMiJSiiSrphFDAV+8J3aw5cbd2T38qWqPhSkMpvVhnOILBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b5c854a0f6df029e1ccf50ef95eb473d3fb32a8a5e46cca510782021b2af975","last_reissued_at":"2026-05-18T04:23:00.355398Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:00.355398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9912391","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":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qd3a1hg6fSRkiHk+LAqyfi39xFNBsKdZAt3nV72mMQNjL9ukyh6xUWBSQNFMjQ+fJ6bW51x2AIrxyzzLpsYqCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:37:20.532754Z"},"content_sha256":"209d7d28e4b22c2e8fba07d31edfd469820bc94d57ff3f336f68f2af15a1eefc","schema_version":"1.0","event_id":"sha256:209d7d28e4b22c2e8fba07d31edfd469820bc94d57ff3f336f68f2af15a1eefc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:JNOIKSQPNXYCTYOM6UHPSXVUOP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Supernova Relic Neutrino Background","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph","authors_text":"G. Steigman, M. Kaplinghat, T. P. Walker","submitted_at":"1999-12-17T20:41:46Z","abstract_excerpt":"An upper bound to the supernova relic neutrino background from all past Type II supernovae is obtained using observations of the Universal metal enrichment history. We show that an unambiguous detection of these relic neutrinos by the Super-Kamiokande detector is unlikely. We also analyze the event rate in the Sudbury Neutrino Observatory (where coincident neutrons from anti-nu_e + D --> n + n + e+ might enhance background rejection), and arrive at the same conclusion. If the relic neutrino flux should be observed to exceed our upper bound and if the observations of the metal enrichment histor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9912391","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":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tgm4dZHADmCUR1Nn/WD3hq+wBSHqYdVw3SP2crOySzbCj+miWE9n5eYPm6aO2htGOjQjWjR/mGafVi9/O3CGAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:37:20.533450Z"},"content_sha256":"c39d0f757d2ce8a38950b573912846f7c4c1a79c9b57d5bb9fad2c245cc24599","schema_version":"1.0","event_id":"sha256:c39d0f757d2ce8a38950b573912846f7c4c1a79c9b57d5bb9fad2c245cc24599"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/bundle.json","state_url":"https://pith.science/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/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":"2026-05-27T08:37:20Z","links":{"resolver":"https://pith.science/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP","bundle":"https://pith.science/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/bundle.json","state":"https://pith.science/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JNOIKSQPNXYCTYOM6UHPSXVUOP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:JNOIKSQPNXYCTYOM6UHPSXVUOP","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":"48a065d18eaefb00377bfb94b139288ff18a513cdab5214d4d2dadf2f2512767","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-12-17T20:41:46Z","title_canon_sha256":"491d2ad9fa49399222e0ce4fbb7aca091a675bbc83e8802c5d08ac004d3ff26b"},"schema_version":"1.0","source":{"id":"astro-ph/9912391","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9912391","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9912391v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9912391","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"JNOIKSQPNXYC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"JNOIKSQPNXYCTYOM","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"JNOIKSQP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:c39d0f757d2ce8a38950b573912846f7c4c1a79c9b57d5bb9fad2c245cc24599","target":"graph","created_at":"2026-05-18T04:23:00Z","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":"An upper bound to the supernova relic neutrino background from all past Type II supernovae is obtained using observations of the Universal metal enrichment history. We show that an unambiguous detection of these relic neutrinos by the Super-Kamiokande detector is unlikely. We also analyze the event rate in the Sudbury Neutrino Observatory (where coincident neutrons from anti-nu_e + D --> n + n + e+ might enhance background rejection), and arrive at the same conclusion. If the relic neutrino flux should be observed to exceed our upper bound and if the observations of the metal enrichment histor","authors_text":"G. Steigman, M. Kaplinghat, T. P. Walker","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-12-17T20:41:46Z","title":"The Supernova Relic Neutrino Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9912391","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":"sha256:209d7d28e4b22c2e8fba07d31edfd469820bc94d57ff3f336f68f2af15a1eefc","target":"record","created_at":"2026-05-18T04:23:00Z","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":"48a065d18eaefb00377bfb94b139288ff18a513cdab5214d4d2dadf2f2512767","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-12-17T20:41:46Z","title_canon_sha256":"491d2ad9fa49399222e0ce4fbb7aca091a675bbc83e8802c5d08ac004d3ff26b"},"schema_version":"1.0","source":{"id":"astro-ph/9912391","kind":"arxiv","version":2}},"canonical_sha256":"4b5c854a0f6df029e1ccf50ef95eb473d3fb32a8a5e46cca510782021b2af975","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b5c854a0f6df029e1ccf50ef95eb473d3fb32a8a5e46cca510782021b2af975","first_computed_at":"2026-05-18T04:23:00.355398Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:00.355398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uwbfCHJOo2VRJo/5XdrvVAlPRdwVfzhEFuGXwchyMiJSiiSrphFDAV+8J3aw5cbd2T38qWqPhSkMpvVhnOILBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:00.356215Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9912391","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:209d7d28e4b22c2e8fba07d31edfd469820bc94d57ff3f336f68f2af15a1eefc","sha256:c39d0f757d2ce8a38950b573912846f7c4c1a79c9b57d5bb9fad2c245cc24599"],"state_sha256":"7d6608a949b67b58b437a5f8070e4923b81503149be2d202d0c14e5e68f44b0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y3Wt+GhGbacfTYQbDeRu2pxEvBigxxwtx1v3qK7XiyWJ20R13zbrTw4XsUFoIOh8Q6/nLDyMCmuKcJKxs78lDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:37:20.537465Z","bundle_sha256":"59a5c22819a71067073592e60c4b2f804bcd2e917b4c88b8837cefda5926104e"}}