{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:6MQWJU6Y22CLHX3JAFZW3DKAQT","short_pith_number":"pith:6MQWJU6Y","schema_version":"1.0","canonical_sha256":"f32164d3d8d684b3df6901736d8d4084cf0fa261f5e23526d7f96255e9910111","source":{"kind":"arxiv","id":"1210.1154","version":2},"attestation_state":"computed","paper":{"title":"A Metal-Strong and Dust-Rich Damped \\lya Absorption System toward the Quasar SDSS J115705.52+615521.7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Fred Hamann, Hong-Lin Lu, Hong-yan Zhou, Hui-Yuan Wang, Jason Xavier Prochaska, Jian Ge, Jian-guo Wang, Peng Jiang, Ting-Gui Wang, Weimin Yuan","submitted_at":"2012-10-03T15:48:08Z","abstract_excerpt":"(Abridged for arXiv) We report the discovery of an unusual, extremely dust-rich and metal-strong damped \\lya absorption system (DLA) at a redshift $z_{a}=2.4596$ toward the quasar SDSS J115705.52+615521.7 (hereafter J1157+6155) with an emission-line redshift $z_{e}=2.5125$. Its neutral hydrogen column density $N_{\\hi} = 10^{21.8\\pm0.2}$ cm$^{-2}$ is among the highest values measured in quasar DLAs. The measured metal column density is $N_{ZnII}\\approx 10^{13.8}$ cm$^{-2}$, which is about 1.5 times larger than the largest value in any previously observed quasar DLAs. The best-fit curve is a MW-"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1210.1154","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-10-03T15:48:08Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"e3eb50bc9769dacc2f61723ca98cb1bb10e6cbf188e847c93fc200cd6229f299","abstract_canon_sha256":"43b3e848a2768e28302544d2b5be08212f6f477212058e7750f93e03c371743f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:41:40.047362Z","signature_b64":"sbufipf/5aC5FvRi7+o06rWpQiDiy4vjqWTqIPdeHCxacP0QBDieVDCYEmnFa9rqOdgDDTrTOxKndnrB/8tFDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f32164d3d8d684b3df6901736d8d4084cf0fa261f5e23526d7f96255e9910111","last_reissued_at":"2026-05-18T03:41:40.046524Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:41:40.046524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Metal-Strong and Dust-Rich Damped \\lya Absorption System toward the Quasar SDSS J115705.52+615521.7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Fred Hamann, Hong-Lin Lu, Hong-yan Zhou, Hui-Yuan Wang, Jason Xavier Prochaska, Jian Ge, Jian-guo Wang, Peng Jiang, Ting-Gui Wang, Weimin Yuan","submitted_at":"2012-10-03T15:48:08Z","abstract_excerpt":"(Abridged for arXiv) We report the discovery of an unusual, extremely dust-rich and metal-strong damped \\lya absorption system (DLA) at a redshift $z_{a}=2.4596$ toward the quasar SDSS J115705.52+615521.7 (hereafter J1157+6155) with an emission-line redshift $z_{e}=2.5125$. Its neutral hydrogen column density $N_{\\hi} = 10^{21.8\\pm0.2}$ cm$^{-2}$ is among the highest values measured in quasar DLAs. The measured metal column density is $N_{ZnII}\\approx 10^{13.8}$ cm$^{-2}$, which is about 1.5 times larger than the largest value in any previously observed quasar DLAs. The best-fit curve is a MW-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.1154","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1210.1154","created_at":"2026-05-18T03:41:40.046656+00:00"},{"alias_kind":"arxiv_version","alias_value":"1210.1154v2","created_at":"2026-05-18T03:41:40.046656+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.1154","created_at":"2026-05-18T03:41:40.046656+00:00"},{"alias_kind":"pith_short_12","alias_value":"6MQWJU6Y22CL","created_at":"2026-05-18T12:26:56.085431+00:00"},{"alias_kind":"pith_short_16","alias_value":"6MQWJU6Y22CLHX3J","created_at":"2026-05-18T12:26:56.085431+00:00"},{"alias_kind":"pith_short_8","alias_value":"6MQWJU6Y","created_at":"2026-05-18T12:26:56.085431+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT","json":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT.json","graph_json":"https://pith.science/api/pith-number/6MQWJU6Y22CLHX3JAFZW3DKAQT/graph.json","events_json":"https://pith.science/api/pith-number/6MQWJU6Y22CLHX3JAFZW3DKAQT/events.json","paper":"https://pith.science/paper/6MQWJU6Y"},"agent_actions":{"view_html":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT","download_json":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT.json","view_paper":"https://pith.science/paper/6MQWJU6Y","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1210.1154&json=true","fetch_graph":"https://pith.science/api/pith-number/6MQWJU6Y22CLHX3JAFZW3DKAQT/graph.json","fetch_events":"https://pith.science/api/pith-number/6MQWJU6Y22CLHX3JAFZW3DKAQT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT/action/storage_attestation","attest_author":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT/action/author_attestation","sign_citation":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT/action/citation_signature","submit_replication":"https://pith.science/pith/6MQWJU6Y22CLHX3JAFZW3DKAQT/action/replication_record"}},"created_at":"2026-05-18T03:41:40.046656+00:00","updated_at":"2026-05-18T03:41:40.046656+00:00"}