{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:ZZI2XATYIY5RXSD7U36M76HPF6","short_pith_number":"pith:ZZI2XATY","canonical_record":{"source":{"id":"astro-ph/0606437","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-19T05:34:17Z","cross_cats_sorted":[],"title_canon_sha256":"490e34e790bb98487964a822542362c1388c752332569163d00642f539d33673","abstract_canon_sha256":"6668665eabe45d79378c29f536e3664c14106ca7a8b2e229768dacaf2d4450bb"},"schema_version":"1.0"},"canonical_sha256":"ce51ab8278463b1bc87fa6fccff8ef2fbc9b9db54f46708d27dd530d6f00f000","source":{"kind":"arxiv","id":"astro-ph/0606437","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0606437","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0606437v1","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0606437","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZZI2XATYIY5R","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_16","alias_value":"ZZI2XATYIY5RXSD7","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_8","alias_value":"ZZI2XATY","created_at":"2026-07-04T16:58:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:ZZI2XATYIY5RXSD7U36M76HPF6","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0606437","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-19T05:34:17Z","cross_cats_sorted":[],"title_canon_sha256":"490e34e790bb98487964a822542362c1388c752332569163d00642f539d33673","abstract_canon_sha256":"6668665eabe45d79378c29f536e3664c14106ca7a8b2e229768dacaf2d4450bb"},"schema_version":"1.0"},"canonical_sha256":"ce51ab8278463b1bc87fa6fccff8ef2fbc9b9db54f46708d27dd530d6f00f000","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:58:54.175557Z","signature_b64":"BIjYbAHFz58Jwtr6EMAIyMDKMvxtsE6QsgYbjPKJWNerh8vWtZzhPKqSwSdvdDRYlLv7HVYbniG7i8nVVWbdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce51ab8278463b1bc87fa6fccff8ef2fbc9b9db54f46708d27dd530d6f00f000","last_reissued_at":"2026-07-04T16:58:54.175225Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:58:54.175225Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0606437","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":"2026-07-04T16:58:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YnX/uKpmpbjhqwTWudRRi5zVfnIeUQl2bJCfi3q4z/HvHxMcbO6cbjHycLD1s3qkgPn7KksxQU144cgT98xXDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T08:05:36.143509Z"},"content_sha256":"3007db2e3b1b3212242b9b8e2db0e15395e2e6ca90dad75fb5807115085ec2d2","schema_version":"1.0","event_id":"sha256:3007db2e3b1b3212242b9b8e2db0e15395e2e6ca90dad75fb5807115085ec2d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:ZZI2XATYIY5RXSD7U36M76HPF6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological production of H_2 before the formation of the first galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Christopher M. Hirata, Nikhil Padmanabhan","submitted_at":"2006-06-19T05:34:17Z","abstract_excerpt":"Previous calculations of the pregalactic chemistry have found that a small amount of H_2, x[H_2]=n[H_2]/n[H] = 2.6e-6, is produced catalytically through the H^-, H_2^+, and HeH^+ mechanisms. We revisit this standard calculation taking into account the effects of the nonthermal radiation background produced by cosmic hydrogen recombination, which is particularly effective at destroying H^- via photodetachment. We also take into consideration the non-equilibrium level populations of H_2^+, which occur since transitions among the rotational-vibrational levels are slow compared to photodissociatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0606437","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/0606437/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":"2026-07-04T16:58:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vbY9cu9Fnjf//U26LAWKMP4WcoxR03jL1LLm9HUC92G2g2abyDCD7kXJCxYrzq87fujB/xzAQpI43KBfmWe9CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T08:05:36.144457Z"},"content_sha256":"496f83dcd3905513b0a58aa3ef221a87f3db64b09226ebbe5d11cce9bd9a5f6d","schema_version":"1.0","event_id":"sha256:496f83dcd3905513b0a58aa3ef221a87f3db64b09226ebbe5d11cce9bd9a5f6d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZZI2XATYIY5RXSD7U36M76HPF6/bundle.json","state_url":"https://pith.science/pith/ZZI2XATYIY5RXSD7U36M76HPF6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZZI2XATYIY5RXSD7U36M76HPF6/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":"2026-08-07T08:05:36Z","links":{"resolver":"https://pith.science/pith/ZZI2XATYIY5RXSD7U36M76HPF6","bundle":"https://pith.science/pith/ZZI2XATYIY5RXSD7U36M76HPF6/bundle.json","state":"https://pith.science/pith/ZZI2XATYIY5RXSD7U36M76HPF6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZZI2XATYIY5RXSD7U36M76HPF6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:ZZI2XATYIY5RXSD7U36M76HPF6","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":"6668665eabe45d79378c29f536e3664c14106ca7a8b2e229768dacaf2d4450bb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-19T05:34:17Z","title_canon_sha256":"490e34e790bb98487964a822542362c1388c752332569163d00642f539d33673"},"schema_version":"1.0","source":{"id":"astro-ph/0606437","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0606437","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0606437v1","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0606437","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZZI2XATYIY5R","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_16","alias_value":"ZZI2XATYIY5RXSD7","created_at":"2026-07-04T16:58:54Z"},{"alias_kind":"pith_short_8","alias_value":"ZZI2XATY","created_at":"2026-07-04T16:58:54Z"}],"graph_snapshots":[{"event_id":"sha256:496f83dcd3905513b0a58aa3ef221a87f3db64b09226ebbe5d11cce9bd9a5f6d","target":"graph","created_at":"2026-07-04T16:58:54Z","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/0606437/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Previous calculations of the pregalactic chemistry have found that a small amount of H_2, x[H_2]=n[H_2]/n[H] = 2.6e-6, is produced catalytically through the H^-, H_2^+, and HeH^+ mechanisms. We revisit this standard calculation taking into account the effects of the nonthermal radiation background produced by cosmic hydrogen recombination, which is particularly effective at destroying H^- via photodetachment. We also take into consideration the non-equilibrium level populations of H_2^+, which occur since transitions among the rotational-vibrational levels are slow compared to photodissociatio","authors_text":"Christopher M. Hirata, Nikhil Padmanabhan","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-06-19T05:34:17Z","title":"Cosmological production of H_2 before the formation of the first galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0606437","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":"sha256:3007db2e3b1b3212242b9b8e2db0e15395e2e6ca90dad75fb5807115085ec2d2","target":"record","created_at":"2026-07-04T16:58:54Z","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":"6668665eabe45d79378c29f536e3664c14106ca7a8b2e229768dacaf2d4450bb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-19T05:34:17Z","title_canon_sha256":"490e34e790bb98487964a822542362c1388c752332569163d00642f539d33673"},"schema_version":"1.0","source":{"id":"astro-ph/0606437","kind":"arxiv","version":1}},"canonical_sha256":"ce51ab8278463b1bc87fa6fccff8ef2fbc9b9db54f46708d27dd530d6f00f000","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce51ab8278463b1bc87fa6fccff8ef2fbc9b9db54f46708d27dd530d6f00f000","first_computed_at":"2026-07-04T16:58:54.175225Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:58:54.175225Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BIjYbAHFz58Jwtr6EMAIyMDKMvxtsE6QsgYbjPKJWNerh8vWtZzhPKqSwSdvdDRYlLv7HVYbniG7i8nVVWbdBg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:58:54.175557Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0606437","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3007db2e3b1b3212242b9b8e2db0e15395e2e6ca90dad75fb5807115085ec2d2","sha256:496f83dcd3905513b0a58aa3ef221a87f3db64b09226ebbe5d11cce9bd9a5f6d"],"state_sha256":"7d950a19297b1077956ac38fccffa3149d11a4bd26a3f31fb3e27cc24be446aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+jTKX9EwyltcnJDHRLg+3XdNByHErJowA1hsdESl4WmwYFDl1+5opFtfWRjAlI3EuqOUzOLbsZubBUc7V11MCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T08:05:36.149873Z","bundle_sha256":"83e2e7dcc743bc11ed77dffad9f5eae1063450dc588687c0d50142d69d003c3d"}}