{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:Q6G2SUMP7WEWAVF5WMZWJ2FTCH","short_pith_number":"pith:Q6G2SUMP","schema_version":"1.0","canonical_sha256":"878da9518ffd896054bdb33364e8b311d3a4b1f5cb03a75595ace9a874b15f83","source":{"kind":"arxiv","id":"1211.4672","version":1},"attestation_state":"computed","paper":{"title":"Atmospheric Extinction Coefficients and Night Sky Brightness At the Xuyi Observational Station","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"H.-B. Yuan, H.-B. Zhao, H.-H Zhang, H.-W. Zhang, J.-S. Yao, M.-S. Xiang, X.-W. Liu","submitted_at":"2012-11-20T07:03:58Z","abstract_excerpt":"We present measurements of the optical broadband atmospheric extinction coefficients and the night sky brightness at the Xuyi Observational Station of Purple Mountain Observatory (PMO). The measurements are based on CCD imaging data taken in the Sloan Digital Sky Survey g, r and i bands with the Xuyi 1.04/1.20m Schmidt Telescope for the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anti-center (XSTPS-GAC), the photometric part of the Digital Sky Survey of the Galactic Anti-center (DSS-GAC). The data were collected in more than 130 winter nights from 2009 to 2011. We find that the a"},"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":"1211.4672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-20T07:03:58Z","cross_cats_sorted":[],"title_canon_sha256":"852668b5d284aab812e0efc5198419664aac084027e6f95723f523aa6f92bb6c","abstract_canon_sha256":"a64b48052fc1835d2b585bf486d5a1858c0afa8adc713cae5fe96b91fdf42e02"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:02.631386Z","signature_b64":"lADO97nLT3S16qqpWIagbMfRNkWisha6/0EODowShfEGR+AXJbbP6t1KyEBt2jx/vzY/bjh6iRfVaI7mKzumAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"878da9518ffd896054bdb33364e8b311d3a4b1f5cb03a75595ace9a874b15f83","last_reissued_at":"2026-05-18T01:53:02.630857Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:02.630857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Atmospheric Extinction Coefficients and Night Sky Brightness At the Xuyi Observational Station","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"H.-B. Yuan, H.-B. Zhao, H.-H Zhang, H.-W. Zhang, J.-S. Yao, M.-S. Xiang, X.-W. Liu","submitted_at":"2012-11-20T07:03:58Z","abstract_excerpt":"We present measurements of the optical broadband atmospheric extinction coefficients and the night sky brightness at the Xuyi Observational Station of Purple Mountain Observatory (PMO). The measurements are based on CCD imaging data taken in the Sloan Digital Sky Survey g, r and i bands with the Xuyi 1.04/1.20m Schmidt Telescope for the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anti-center (XSTPS-GAC), the photometric part of the Digital Sky Survey of the Galactic Anti-center (DSS-GAC). The data were collected in more than 130 winter nights from 2009 to 2011. We find that the a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.4672","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1211.4672","created_at":"2026-05-18T01:53:02.630931+00:00"},{"alias_kind":"arxiv_version","alias_value":"1211.4672v1","created_at":"2026-05-18T01:53:02.630931+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.4672","created_at":"2026-05-18T01:53:02.630931+00:00"},{"alias_kind":"pith_short_12","alias_value":"Q6G2SUMP7WEW","created_at":"2026-05-18T12:27:18.751474+00:00"},{"alias_kind":"pith_short_16","alias_value":"Q6G2SUMP7WEWAVF5","created_at":"2026-05-18T12:27:18.751474+00:00"},{"alias_kind":"pith_short_8","alias_value":"Q6G2SUMP","created_at":"2026-05-18T12:27:18.751474+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/Q6G2SUMP7WEWAVF5WMZWJ2FTCH","json":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH.json","graph_json":"https://pith.science/api/pith-number/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/graph.json","events_json":"https://pith.science/api/pith-number/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/events.json","paper":"https://pith.science/paper/Q6G2SUMP"},"agent_actions":{"view_html":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH","download_json":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH.json","view_paper":"https://pith.science/paper/Q6G2SUMP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1211.4672&json=true","fetch_graph":"https://pith.science/api/pith-number/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/graph.json","fetch_events":"https://pith.science/api/pith-number/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/action/storage_attestation","attest_author":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/action/author_attestation","sign_citation":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/action/citation_signature","submit_replication":"https://pith.science/pith/Q6G2SUMP7WEWAVF5WMZWJ2FTCH/action/replication_record"}},"created_at":"2026-05-18T01:53:02.630931+00:00","updated_at":"2026-05-18T01:53:02.630931+00:00"}