{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:6P3XJJ2BI2PGKOMQEP2CXGOPVQ","short_pith_number":"pith:6P3XJJ2B","canonical_record":{"source":{"id":"2103.10964","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-03-19T18:00:09Z","cross_cats_sorted":["astro-ph.IM","physics.data-an"],"title_canon_sha256":"abf0201b85da61e19a192a74907d592af9649bfffb2a3e559efa5dc29656ed09","abstract_canon_sha256":"b570ae203010a1da6de2fd6d97642e2c293f6042dd4ccfdd02df2d3749b39c72"},"schema_version":"1.0"},"canonical_sha256":"f3f774a741469e65399023f42b99cfac0db648e6dd80d2c4fcf73b21bd26aeaa","source":{"kind":"arxiv","id":"2103.10964","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.10964","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"arxiv_version","alias_value":"2103.10964v2","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.10964","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_12","alias_value":"6P3XJJ2BI2PG","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_16","alias_value":"6P3XJJ2BI2PGKOMQ","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_8","alias_value":"6P3XJJ2B","created_at":"2026-07-05T03:07:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:6P3XJJ2BI2PGKOMQEP2CXGOPVQ","target":"record","payload":{"canonical_record":{"source":{"id":"2103.10964","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-03-19T18:00:09Z","cross_cats_sorted":["astro-ph.IM","physics.data-an"],"title_canon_sha256":"abf0201b85da61e19a192a74907d592af9649bfffb2a3e559efa5dc29656ed09","abstract_canon_sha256":"b570ae203010a1da6de2fd6d97642e2c293f6042dd4ccfdd02df2d3749b39c72"},"schema_version":"1.0"},"canonical_sha256":"f3f774a741469e65399023f42b99cfac0db648e6dd80d2c4fcf73b21bd26aeaa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:07:47.723095Z","signature_b64":"VqTm1fBWw4PJ4f03TD1vEvXdXaXD23YrR0kZD+UWEP6s5UAoJvtdAV8G52BILA/NmONefV+XlNQiJzz7DFC7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3f774a741469e65399023f42b99cfac0db648e6dd80d2c4fcf73b21bd26aeaa","last_reissued_at":"2026-07-05T03:07:47.722639Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:07:47.722639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.10964","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":"2026-07-05T03:07:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BcIT78vkAqiZ5xBfKiO1dkNa5ehCJSJg/vUdkMY+8EIisSr6xBsSNp17ZFUXPhipRh+RGv7kqRw4nZMxQW9eDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:07:22.479396Z"},"content_sha256":"eeebdddf235299a86b0283154c34fba4cb7d215abf1f31609122f429a15978ab","schema_version":"1.0","event_id":"sha256:eeebdddf235299a86b0283154c34fba4cb7d215abf1f31609122f429a15978ab"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:6P3XJJ2BI2PGKOMQEP2CXGOPVQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Damped Lyman-alpha Absorbers from Sloan Digital Sky Survey DR16Q with Gaussian processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","physics.data-an"],"primary_cat":"astro-ph.GA","authors_text":"Ming-Feng Ho, Roman Garnett, Simeon Bird","submitted_at":"2021-03-19T18:00:09Z","abstract_excerpt":"We present a new catalogue of Damped Lyman-$\\alpha$ absorbers from SDSS DR16Q, as well as new estimates of their statistical properties. Our estimates are computed with the Gaussian process models presented in Garnett et al. (2017); Ho et al. (2020) with an improved model for marginalising uncertainty in the mean optical depth of each quasar. We compute the column density distribution function (CDDF) at $2 < z < 5$, the line density ($\\textrm{d} N/ \\textrm{d} X$), and the neutral hydrogen density ($\\Omega_{\\textrm{DLA}}$). Our Gaussian process model provides a posterior probability distributio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.10964","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/2103.10964/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":"2026-07-05T03:07:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GQZwb3jLQC7p6va+SZ7YIfraglAc/KgkIPVPY47UyaNvYc6GkrKz+7g+AMtTtNTdlDMRiM48sonJRYGALMaJAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:07:22.479885Z"},"content_sha256":"b2830380a4c5062f3218eadb9fcc058652b4039a0d92f23d6a76972f876e08c8","schema_version":"1.0","event_id":"sha256:b2830380a4c5062f3218eadb9fcc058652b4039a0d92f23d6a76972f876e08c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/bundle.json","state_url":"https://pith.science/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/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":"2026-08-04T17:07:22Z","links":{"resolver":"https://pith.science/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ","bundle":"https://pith.science/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/bundle.json","state":"https://pith.science/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6P3XJJ2BI2PGKOMQEP2CXGOPVQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:6P3XJJ2BI2PGKOMQEP2CXGOPVQ","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":"b570ae203010a1da6de2fd6d97642e2c293f6042dd4ccfdd02df2d3749b39c72","cross_cats_sorted":["astro-ph.IM","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-03-19T18:00:09Z","title_canon_sha256":"abf0201b85da61e19a192a74907d592af9649bfffb2a3e559efa5dc29656ed09"},"schema_version":"1.0","source":{"id":"2103.10964","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.10964","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"arxiv_version","alias_value":"2103.10964v2","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.10964","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_12","alias_value":"6P3XJJ2BI2PG","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_16","alias_value":"6P3XJJ2BI2PGKOMQ","created_at":"2026-07-05T03:07:47Z"},{"alias_kind":"pith_short_8","alias_value":"6P3XJJ2B","created_at":"2026-07-05T03:07:47Z"}],"graph_snapshots":[{"event_id":"sha256:b2830380a4c5062f3218eadb9fcc058652b4039a0d92f23d6a76972f876e08c8","target":"graph","created_at":"2026-07-05T03:07:47Z","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/2103.10964/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a new catalogue of Damped Lyman-$\\alpha$ absorbers from SDSS DR16Q, as well as new estimates of their statistical properties. Our estimates are computed with the Gaussian process models presented in Garnett et al. (2017); Ho et al. (2020) with an improved model for marginalising uncertainty in the mean optical depth of each quasar. We compute the column density distribution function (CDDF) at $2 < z < 5$, the line density ($\\textrm{d} N/ \\textrm{d} X$), and the neutral hydrogen density ($\\Omega_{\\textrm{DLA}}$). Our Gaussian process model provides a posterior probability distributio","authors_text":"Ming-Feng Ho, Roman Garnett, Simeon Bird","cross_cats":["astro-ph.IM","physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-03-19T18:00:09Z","title":"Damped Lyman-alpha Absorbers from Sloan Digital Sky Survey DR16Q with Gaussian processes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.10964","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:eeebdddf235299a86b0283154c34fba4cb7d215abf1f31609122f429a15978ab","target":"record","created_at":"2026-07-05T03:07:47Z","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":"b570ae203010a1da6de2fd6d97642e2c293f6042dd4ccfdd02df2d3749b39c72","cross_cats_sorted":["astro-ph.IM","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-03-19T18:00:09Z","title_canon_sha256":"abf0201b85da61e19a192a74907d592af9649bfffb2a3e559efa5dc29656ed09"},"schema_version":"1.0","source":{"id":"2103.10964","kind":"arxiv","version":2}},"canonical_sha256":"f3f774a741469e65399023f42b99cfac0db648e6dd80d2c4fcf73b21bd26aeaa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3f774a741469e65399023f42b99cfac0db648e6dd80d2c4fcf73b21bd26aeaa","first_computed_at":"2026-07-05T03:07:47.722639Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:07:47.722639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VqTm1fBWw4PJ4f03TD1vEvXdXaXD23YrR0kZD+UWEP6s5UAoJvtdAV8G52BILA/NmONefV+XlNQiJzz7DFC7DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:07:47.723095Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.10964","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eeebdddf235299a86b0283154c34fba4cb7d215abf1f31609122f429a15978ab","sha256:b2830380a4c5062f3218eadb9fcc058652b4039a0d92f23d6a76972f876e08c8"],"state_sha256":"67d1a7d7891d7b125882949fa08a1176ded6da44019c5281676f2db469aef956"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EOZHF4LTOJ4jWrya2lZHIJ0ES/5wGPi3Z83IR4DgSrODiS3yKCYXuAUhK7/KUfHBZDXKar2wRTtnS1HUkEkxAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:07:22.483479Z","bundle_sha256":"b633dd70bf12740a4a655252b2b00cf5e74a70a35b75df7908e6a7a8dba43f06"}}