{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:KNJU3BHQIBI3YNLFPOFJGHZIDN","short_pith_number":"pith:KNJU3BHQ","canonical_record":{"source":{"id":"0802.3239","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-22T00:25:46Z","cross_cats_sorted":[],"title_canon_sha256":"032d3de6c67b276c85e86866981fde014cf1447c0205bd3ba66ccaabfd8b4797","abstract_canon_sha256":"e5d10fedb66ae4a11d48d9dc96c67ff1dc691a04825ab8c3abc160b1ae9b6b2c"},"schema_version":"1.0"},"canonical_sha256":"53534d84f04051bc35657b8a931f281b6e45631076eeb3bd417794ec6072375d","source":{"kind":"arxiv","id":"0802.3239","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.3239","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"arxiv_version","alias_value":"0802.3239v1","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.3239","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_12","alias_value":"KNJU3BHQIBI3","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_16","alias_value":"KNJU3BHQIBI3YNLF","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_8","alias_value":"KNJU3BHQ","created_at":"2026-07-04T17:09:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:KNJU3BHQIBI3YNLFPOFJGHZIDN","target":"record","payload":{"canonical_record":{"source":{"id":"0802.3239","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-22T00:25:46Z","cross_cats_sorted":[],"title_canon_sha256":"032d3de6c67b276c85e86866981fde014cf1447c0205bd3ba66ccaabfd8b4797","abstract_canon_sha256":"e5d10fedb66ae4a11d48d9dc96c67ff1dc691a04825ab8c3abc160b1ae9b6b2c"},"schema_version":"1.0"},"canonical_sha256":"53534d84f04051bc35657b8a931f281b6e45631076eeb3bd417794ec6072375d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:09:25.978143Z","signature_b64":"4LcQhefMfDJkDxVV+5UesCWLsrNzPCdvBRd1K70/3iZqd9IYTC2vP0TQX1w+v1+fBtW0Tvr26mWqi46PrqDcCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53534d84f04051bc35657b8a931f281b6e45631076eeb3bd417794ec6072375d","last_reissued_at":"2026-07-04T17:09:25.977775Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:09:25.977775Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0802.3239","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":"2026-07-04T17:09:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5aIcD5ta2zk5f8xtJK8+pzL4YFVDl4KvcZkNuXBN3ZIAhKuYlMig5tNOc2w1/tMSuoNFev1LmG1HMyGdN2YDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:05:43.436932Z"},"content_sha256":"fda91df251429bc8936faae5865273c388f50143e264801ca4f8dd25fe206f14","schema_version":"1.0","event_id":"sha256:fda91df251429bc8936faae5865273c388f50143e264801ca4f8dd25fe206f14"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:KNJU3BHQIBI3YNLFPOFJGHZIDN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First Detection of Cosmic Structure in the 21-cm Intensity Field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jeffrey Peterson, Lister Staveley-Smith, Tzu-Ching Chang, Ue-Li Pen","submitted_at":"2008-02-22T00:25:46Z","abstract_excerpt":"We present the first statistically significant detection of cosmic structure using broadly distributed hydrogen radio emission. This is accomplished using a cross correlation with optical galaxies. Statistical noise levels of $20 \\mu $K are achieved, unprecedented in this frequency band. This lends support to the idea that large volumes of the universe can be rapidly mapped without the need to resolve individual faint galaxies, enabling precise constraints to dark energy models. We discuss strategies for improved intensity mapping."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.3239","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/0802.3239/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":"2026-07-04T17:09:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+L473XoxCPjoaCiQptIKKZseVxP+vO5mpFWX5gQCe+K7jzGv7ApHpxCHnpadf0QHE+eDLlh5mY3MX6cGID5DAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:05:43.437505Z"},"content_sha256":"1283653d5ef483497ccb0efbbfdea19129c713571ecb438cf9a43b6d2682761d","schema_version":"1.0","event_id":"sha256:1283653d5ef483497ccb0efbbfdea19129c713571ecb438cf9a43b6d2682761d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/bundle.json","state_url":"https://pith.science/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/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":"2026-08-14T19:05:43Z","links":{"resolver":"https://pith.science/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN","bundle":"https://pith.science/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/bundle.json","state":"https://pith.science/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KNJU3BHQIBI3YNLFPOFJGHZIDN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:KNJU3BHQIBI3YNLFPOFJGHZIDN","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":"e5d10fedb66ae4a11d48d9dc96c67ff1dc691a04825ab8c3abc160b1ae9b6b2c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-22T00:25:46Z","title_canon_sha256":"032d3de6c67b276c85e86866981fde014cf1447c0205bd3ba66ccaabfd8b4797"},"schema_version":"1.0","source":{"id":"0802.3239","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.3239","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"arxiv_version","alias_value":"0802.3239v1","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.3239","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_12","alias_value":"KNJU3BHQIBI3","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_16","alias_value":"KNJU3BHQIBI3YNLF","created_at":"2026-07-04T17:09:25Z"},{"alias_kind":"pith_short_8","alias_value":"KNJU3BHQ","created_at":"2026-07-04T17:09:25Z"}],"graph_snapshots":[{"event_id":"sha256:1283653d5ef483497ccb0efbbfdea19129c713571ecb438cf9a43b6d2682761d","target":"graph","created_at":"2026-07-04T17:09:25Z","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/0802.3239/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first statistically significant detection of cosmic structure using broadly distributed hydrogen radio emission. This is accomplished using a cross correlation with optical galaxies. Statistical noise levels of $20 \\mu $K are achieved, unprecedented in this frequency band. This lends support to the idea that large volumes of the universe can be rapidly mapped without the need to resolve individual faint galaxies, enabling precise constraints to dark energy models. We discuss strategies for improved intensity mapping.","authors_text":"Jeffrey Peterson, Lister Staveley-Smith, Tzu-Ching Chang, Ue-Li Pen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-22T00:25:46Z","title":"First Detection of Cosmic Structure in the 21-cm Intensity Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.3239","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:fda91df251429bc8936faae5865273c388f50143e264801ca4f8dd25fe206f14","target":"record","created_at":"2026-07-04T17:09:25Z","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":"e5d10fedb66ae4a11d48d9dc96c67ff1dc691a04825ab8c3abc160b1ae9b6b2c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-22T00:25:46Z","title_canon_sha256":"032d3de6c67b276c85e86866981fde014cf1447c0205bd3ba66ccaabfd8b4797"},"schema_version":"1.0","source":{"id":"0802.3239","kind":"arxiv","version":1}},"canonical_sha256":"53534d84f04051bc35657b8a931f281b6e45631076eeb3bd417794ec6072375d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"53534d84f04051bc35657b8a931f281b6e45631076eeb3bd417794ec6072375d","first_computed_at":"2026-07-04T17:09:25.977775Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:09:25.977775Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4LcQhefMfDJkDxVV+5UesCWLsrNzPCdvBRd1K70/3iZqd9IYTC2vP0TQX1w+v1+fBtW0Tvr26mWqi46PrqDcCA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:09:25.978143Z","signed_message":"canonical_sha256_bytes"},"source_id":"0802.3239","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fda91df251429bc8936faae5865273c388f50143e264801ca4f8dd25fe206f14","sha256:1283653d5ef483497ccb0efbbfdea19129c713571ecb438cf9a43b6d2682761d"],"state_sha256":"c3fcec3e2a7248a24d80b617ec157e9be87e3033ce0a77a78d30b7e472ce099e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tpv0GbXKeXE2qd7Kt4SEx4+T+G7rLsZH1VN3MvcIy6VDhDm+C0Aa0e01LUlU5I3B5SleyCxtMmp9ZX3+MTevAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T19:05:43.442679Z","bundle_sha256":"26a0be7b471a7ed830228069ec5494635960b0da88e9f410a450ad47f5bb966c"}}