{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:MMYCBQT5VN3RLCKTXTPBH4U55U","short_pith_number":"pith:MMYCBQT5","canonical_record":{"source":{"id":"astro-ph/0509481","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-16T00:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"5856cec8c208720cdba4a207e9424e750571705069407ca403f981f1e3701e7f","abstract_canon_sha256":"cabf9b8a6baeb06ef9f72f679fc225ecadbfb41db7ebd04b1a02c8a51b972e5f"},"schema_version":"1.0"},"canonical_sha256":"633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae","source":{"kind":"arxiv","id":"astro-ph/0509481","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0509481","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0509481v2","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0509481","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"MMYCBQT5VN3R","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"MMYCBQT5VN3RLCKT","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"MMYCBQT5","created_at":"2026-07-04T15:45:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:MMYCBQT5VN3RLCKTXTPBH4U55U","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0509481","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-16T00:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"5856cec8c208720cdba4a207e9424e750571705069407ca403f981f1e3701e7f","abstract_canon_sha256":"cabf9b8a6baeb06ef9f72f679fc225ecadbfb41db7ebd04b1a02c8a51b972e5f"},"schema_version":"1.0"},"canonical_sha256":"633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:45:42.990879Z","signature_b64":"59kw0Hxoa/KneOKpYUy2nupYvz7tMASjdpuURkShAnP4Rou+jWd4DgYiXTwufxj7bSjMSPKe3fesUWR21j7GBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae","last_reissued_at":"2026-07-04T15:45:42.990525Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:45:42.990525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0509481","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":"2026-07-04T15:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6wDo02hKwOC5GFQsRRf8J6NGmb8L17Mr/KxSemwWMH88qalCcBp1mNboea54N8oI0Ht44MQxTkDic2V3MZFeBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:42:10.614380Z"},"content_sha256":"fadd053b077454441f32d02905838ce6a75dec3849f64d86f91f2980c1df5ab5","schema_version":"1.0","event_id":"sha256:fadd053b077454441f32d02905838ce6a75dec3849f64d86f91f2980c1df5ab5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:MMYCBQT5VN3RLCKTXTPBH4U55U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Damped Lyman alpha Systems","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Arthur M. Wolfe (UCSD), Eric Gawiser (Yale), Jason X. Prochaska (UCSC)","submitted_at":"2005-09-16T00:58:44Z","abstract_excerpt":"Observations of damped Lyman alpha systems offer a unique window on the neutral-gas reservoirs that gave rise to galaxies at high redshifts. This review focuses on critical properties such as the H I and metal content of the gas and on independent evidence for star formation. Together, these provide an emerging picture of gravitationally bound objects in which accretion of gas from the IGM replenishes gas consumed by star formation. Other properties such as dust content, molecular content, ionized-gas content, gas kinematics, and galaxy identifications are also reviewed. These properties point"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0509481","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0509481/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":"2026-07-04T15:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e+IPs6fXDwdm3hHk0fbCFeUKiaKqkN5zvxXxGL90PfrZkvoGHHXuuSmEJsZpME2e5ap44yb5Db9id/IXLyJnCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:42:10.615301Z"},"content_sha256":"b32dd6e27aee00becdc849b3f44bc7864be3e352014c9ab8fa50290d8feffad1","schema_version":"1.0","event_id":"sha256:b32dd6e27aee00becdc849b3f44bc7864be3e352014c9ab8fa50290d8feffad1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/bundle.json","state_url":"https://pith.science/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/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":"2026-08-01T21:42:10Z","links":{"resolver":"https://pith.science/pith/MMYCBQT5VN3RLCKTXTPBH4U55U","bundle":"https://pith.science/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/bundle.json","state":"https://pith.science/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MMYCBQT5VN3RLCKTXTPBH4U55U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:MMYCBQT5VN3RLCKTXTPBH4U55U","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":"cabf9b8a6baeb06ef9f72f679fc225ecadbfb41db7ebd04b1a02c8a51b972e5f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-16T00:58:44Z","title_canon_sha256":"5856cec8c208720cdba4a207e9424e750571705069407ca403f981f1e3701e7f"},"schema_version":"1.0","source":{"id":"astro-ph/0509481","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0509481","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0509481v2","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0509481","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"MMYCBQT5VN3R","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"MMYCBQT5VN3RLCKT","created_at":"2026-07-04T15:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"MMYCBQT5","created_at":"2026-07-04T15:45:42Z"}],"graph_snapshots":[{"event_id":"sha256:b32dd6e27aee00becdc849b3f44bc7864be3e352014c9ab8fa50290d8feffad1","target":"graph","created_at":"2026-07-04T15:45:42Z","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/0509481/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observations of damped Lyman alpha systems offer a unique window on the neutral-gas reservoirs that gave rise to galaxies at high redshifts. This review focuses on critical properties such as the H I and metal content of the gas and on independent evidence for star formation. Together, these provide an emerging picture of gravitationally bound objects in which accretion of gas from the IGM replenishes gas consumed by star formation. Other properties such as dust content, molecular content, ionized-gas content, gas kinematics, and galaxy identifications are also reviewed. These properties point","authors_text":"Arthur M. Wolfe (UCSD), Eric Gawiser (Yale), Jason X. Prochaska (UCSC)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-09-16T00:58:44Z","title":"Damped Lyman alpha Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0509481","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:fadd053b077454441f32d02905838ce6a75dec3849f64d86f91f2980c1df5ab5","target":"record","created_at":"2026-07-04T15:45:42Z","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":"cabf9b8a6baeb06ef9f72f679fc225ecadbfb41db7ebd04b1a02c8a51b972e5f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-16T00:58:44Z","title_canon_sha256":"5856cec8c208720cdba4a207e9424e750571705069407ca403f981f1e3701e7f"},"schema_version":"1.0","source":{"id":"astro-ph/0509481","kind":"arxiv","version":2}},"canonical_sha256":"633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae","first_computed_at":"2026-07-04T15:45:42.990525Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:45:42.990525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"59kw0Hxoa/KneOKpYUy2nupYvz7tMASjdpuURkShAnP4Rou+jWd4DgYiXTwufxj7bSjMSPKe3fesUWR21j7GBA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:45:42.990879Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0509481","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fadd053b077454441f32d02905838ce6a75dec3849f64d86f91f2980c1df5ab5","sha256:b32dd6e27aee00becdc849b3f44bc7864be3e352014c9ab8fa50290d8feffad1"],"state_sha256":"0bda5dc193a3a165f4d9f355389fa7800fe8dacc138650c74cd019428adaada9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OtIsk+ID5TX8uT/U2iZyT0H+mq2GX63r4WJXG0a2x634JlDDwgNZto8h61IRaaiW1wFAD2MIMt5RQsBR8bGsDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T21:42:10.622447Z","bundle_sha256":"3b1ef82aefea4b315e7dc92409f89caf4f176e2bd4151162e907ef9179ca276b"}}