{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QYUROWVJGO4BF5E3YVT3DKRXDX","short_pith_number":"pith:QYUROWVJ","canonical_record":{"source":{"id":"1809.01053","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T15:42:52Z","cross_cats_sorted":[],"title_canon_sha256":"b791fae84d98219a3a596fb7611fd51111263595b6dcf662ea132700589a5ba1","abstract_canon_sha256":"9a3fdc090617eefba628a1d3a4e6635f536ac2964412dbe8ed8b4ea7136a9c5f"},"schema_version":"1.0"},"canonical_sha256":"8629175aa933b812f49bc567b1aa371dc9eef2e92afd769baff874a11b009f82","source":{"kind":"arxiv","id":"1809.01053","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01053","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01053v1","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01053","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"pith_short_12","alias_value":"QYUROWVJGO4B","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QYUROWVJGO4BF5E3","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QYUROWVJ","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QYUROWVJGO4BF5E3YVT3DKRXDX","target":"record","payload":{"canonical_record":{"source":{"id":"1809.01053","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T15:42:52Z","cross_cats_sorted":[],"title_canon_sha256":"b791fae84d98219a3a596fb7611fd51111263595b6dcf662ea132700589a5ba1","abstract_canon_sha256":"9a3fdc090617eefba628a1d3a4e6635f536ac2964412dbe8ed8b4ea7136a9c5f"},"schema_version":"1.0"},"canonical_sha256":"8629175aa933b812f49bc567b1aa371dc9eef2e92afd769baff874a11b009f82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:18.203012Z","signature_b64":"RjFdstqooSfPIqJ6niXrE+XUCDePTCKZtEwP/f4Q8bWD7k8SiBFlHOQt33VSSy8OqSh++OOkslo1mgXA4wm5Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8629175aa933b812f49bc567b1aa371dc9eef2e92afd769baff874a11b009f82","last_reissued_at":"2026-05-18T00:00:18.202502Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:18.202502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.01053","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":"2026-05-18T00:00:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"02ZdrYL76s2lIS00NLn/Z/ZF9aq/Tu/TyCSYVw5dITuE3BMaIElUCo1tFVFaAA3t3dfbI4SZnZ/1/Q1NwEe6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:34:15.734143Z"},"content_sha256":"860dc1fee8fa8456ac1669f4ed83aa2e22c5cf4681ca7f88b66070e8b21110e4","schema_version":"1.0","event_id":"sha256:860dc1fee8fa8456ac1669f4ed83aa2e22c5cf4681ca7f88b66070e8b21110e4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QYUROWVJGO4BF5E3YVT3DKRXDX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dissecting cold gas in a high-redshift galaxy using a lensed background quasar","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Smette, F. Courbin, J. Hennawi, J.-K. Krogager, J. M. O'Meara, J. P. U. Fynbo, J. X. Prochaska, M. Fumagalli, M. Rafelski, P. Boiss\\'e, P. Noterdaeme, S. Balashev","submitted_at":"2018-09-04T15:42:52Z","abstract_excerpt":"We present a study of cold gas absorption from a damped Lyman-$\\alpha$ absorber (DLA) at redshift $z_{\\rm abs}=1.946$ towards two lensed images of the quasar J144254.78+405535.5 at redshift $z_{\\rm QSO} = 2.590$. The physical separation of the two lines of sight at the absorber redshift is $d_{\\rm abs}=0.7$~kpc based on our lens model. We observe absorption lines from neutral carbon and H$_2$ along both lines of sight indicating that cold gas is present on scales larger than $d_{\\rm abs}$. We measure column densities of HI to be $\\log N(\\rm H\\,\\i) = 20.27\\pm0.02$ and $20.34\\pm0.05$ and of H$_2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01053","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":""},"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":"2026-05-18T00:00:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4dJr4XxLZ6os32P8kWKGPdb39rQwEFQYImHS3cbuXkfpHIP/IWZvpQ8dac0uAPC1JkLFWdG7bbv8X97RYRLODg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:34:15.734574Z"},"content_sha256":"9e5df2942f82fd4ea3b0ea8a50f3737af0c07696f6f18b74c41d6f98e4e81bf4","schema_version":"1.0","event_id":"sha256:9e5df2942f82fd4ea3b0ea8a50f3737af0c07696f6f18b74c41d6f98e4e81bf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/bundle.json","state_url":"https://pith.science/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/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":"2026-05-30T16:34:15Z","links":{"resolver":"https://pith.science/pith/QYUROWVJGO4BF5E3YVT3DKRXDX","bundle":"https://pith.science/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/bundle.json","state":"https://pith.science/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QYUROWVJGO4BF5E3YVT3DKRXDX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QYUROWVJGO4BF5E3YVT3DKRXDX","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":"9a3fdc090617eefba628a1d3a4e6635f536ac2964412dbe8ed8b4ea7136a9c5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T15:42:52Z","title_canon_sha256":"b791fae84d98219a3a596fb7611fd51111263595b6dcf662ea132700589a5ba1"},"schema_version":"1.0","source":{"id":"1809.01053","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.01053","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"arxiv_version","alias_value":"1809.01053v1","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.01053","created_at":"2026-05-18T00:00:18Z"},{"alias_kind":"pith_short_12","alias_value":"QYUROWVJGO4B","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QYUROWVJGO4BF5E3","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QYUROWVJ","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:9e5df2942f82fd4ea3b0ea8a50f3737af0c07696f6f18b74c41d6f98e4e81bf4","target":"graph","created_at":"2026-05-18T00:00:18Z","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":"We present a study of cold gas absorption from a damped Lyman-$\\alpha$ absorber (DLA) at redshift $z_{\\rm abs}=1.946$ towards two lensed images of the quasar J144254.78+405535.5 at redshift $z_{\\rm QSO} = 2.590$. The physical separation of the two lines of sight at the absorber redshift is $d_{\\rm abs}=0.7$~kpc based on our lens model. We observe absorption lines from neutral carbon and H$_2$ along both lines of sight indicating that cold gas is present on scales larger than $d_{\\rm abs}$. We measure column densities of HI to be $\\log N(\\rm H\\,\\i) = 20.27\\pm0.02$ and $20.34\\pm0.05$ and of H$_2","authors_text":"A. Smette, F. Courbin, J. Hennawi, J.-K. Krogager, J. M. O'Meara, J. P. U. Fynbo, J. X. Prochaska, M. Fumagalli, M. Rafelski, P. Boiss\\'e, P. Noterdaeme, S. Balashev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T15:42:52Z","title":"Dissecting cold gas in a high-redshift galaxy using a lensed background quasar"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01053","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":"sha256:860dc1fee8fa8456ac1669f4ed83aa2e22c5cf4681ca7f88b66070e8b21110e4","target":"record","created_at":"2026-05-18T00:00:18Z","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":"9a3fdc090617eefba628a1d3a4e6635f536ac2964412dbe8ed8b4ea7136a9c5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-04T15:42:52Z","title_canon_sha256":"b791fae84d98219a3a596fb7611fd51111263595b6dcf662ea132700589a5ba1"},"schema_version":"1.0","source":{"id":"1809.01053","kind":"arxiv","version":1}},"canonical_sha256":"8629175aa933b812f49bc567b1aa371dc9eef2e92afd769baff874a11b009f82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8629175aa933b812f49bc567b1aa371dc9eef2e92afd769baff874a11b009f82","first_computed_at":"2026-05-18T00:00:18.202502Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:18.202502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RjFdstqooSfPIqJ6niXrE+XUCDePTCKZtEwP/f4Q8bWD7k8SiBFlHOQt33VSSy8OqSh++OOkslo1mgXA4wm5Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:18.203012Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.01053","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:860dc1fee8fa8456ac1669f4ed83aa2e22c5cf4681ca7f88b66070e8b21110e4","sha256:9e5df2942f82fd4ea3b0ea8a50f3737af0c07696f6f18b74c41d6f98e4e81bf4"],"state_sha256":"134771bd73e0e62059ef311beffb610f0cdbcc528812ac348b733b02da8ba388"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KzJH+BtNtx8OB4Dn4vKjMpfE7PTHrH2jxzgHCe9gYiu29Or9KZhEjA66ZFSFAaG1h61UBtZa86/mvBJV4QuBAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T16:34:15.737775Z","bundle_sha256":"e7bac226c93a1c63ac5c7282a1a7da5ee08d83f69cb309ee800450f561611958"}}