{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:ED3PWWJDVXGPTDTBSJR4CZPRFM","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":"41a46099b61923e3e0e0f94d14db4e81584c8c76a913090c521a3492dafb427d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:29:58Z","title_canon_sha256":"abeaf58f5d698dfde21b5dd0065eabfbef84af2f9febe2485b6ee7e2354c4762"},"schema_version":"1.0","source":{"id":"astro-ph/9709144","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9709144","created_at":"2026-07-04T14:49:15Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9709144v1","created_at":"2026-07-04T14:49:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9709144","created_at":"2026-07-04T14:49:15Z"},{"alias_kind":"pith_short_12","alias_value":"ED3PWWJDVXGP","created_at":"2026-07-04T14:49:15Z"},{"alias_kind":"pith_short_16","alias_value":"ED3PWWJDVXGPTDTB","created_at":"2026-07-04T14:49:15Z"},{"alias_kind":"pith_short_8","alias_value":"ED3PWWJD","created_at":"2026-07-04T14:49:15Z"}],"graph_snapshots":[{"event_id":"sha256:7b73ceae683cfac0ce63533553bcc17f20a1828cea0eb862ef088bb3d43bbb09","target":"graph","created_at":"2026-07-04T14:49:15Z","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/9709144/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ROSAT Deep Survey includes a complete sample of 50 X-ray sources with fluxes in the $0.5 - 2$ keV band larger than 5.5 $10^{-15}$ erg cm$^{-2}$ s$^{-1}$ in the Lockman field (Hasinger et al., Paper I). We have obtained deep broad-band CCD images of the field and spectra of many optical objects near the positions of the X-ray sources. We define systematically the process leading to the optical identifications of the X-ray sources. For this purpose, we introduce five identification (ID) classes that characterize the process in each case. Among the 50 X-ray sources, we identify 39 AGNs, 3 gro","authors_text":"(2) Astrophysikalisches Inst. Potsdam, (3) Princeton University, (4) Pennsylvania State University, (5) Johns Hopkins University, (6) ESO Garching, (7) STScI Baltimore, (8) MPE Garching, (9) Bologna Observatory), Don Schneider (4), & Gianni Zamorani (9) ((1) Caltech, Guenther Hasinger (2), Ingo Lehmann (2), James Gunn (3), Joachim Truemper (8), John MacKenty (7), Maarten Schmidt (1), Riccardo Giacconi (6), Richard Burg (5)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:29:58Z","title":"The ROSAT Deep Survey II. Optical identification, photomettry and spectra of sources in the Lockman field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9709144","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:b409b144ef43abaf51a12b3944d62c3e13969728cae595f57f296f3e43dbd0e5","target":"record","created_at":"2026-07-04T14:49:15Z","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":"41a46099b61923e3e0e0f94d14db4e81584c8c76a913090c521a3492dafb427d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:29:58Z","title_canon_sha256":"abeaf58f5d698dfde21b5dd0065eabfbef84af2f9febe2485b6ee7e2354c4762"},"schema_version":"1.0","source":{"id":"astro-ph/9709144","kind":"arxiv","version":1}},"canonical_sha256":"20f6fb5923adccf98e619263c165f12b02348ea546d2f2040d67bb5eebab4d84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20f6fb5923adccf98e619263c165f12b02348ea546d2f2040d67bb5eebab4d84","first_computed_at":"2026-07-04T14:49:15.346578Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:49:15.346578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Co6+R4EscbpGZYnj/re1fFKJMlvAgT8+BofwPtXT6/wU0O2ii0WjHRHJwRIr8X2N9/071xMsSgmb/UNo3bFzBA==","signature_status":"signed_v1","signed_at":"2026-07-04T14:49:15.347754Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9709144","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b409b144ef43abaf51a12b3944d62c3e13969728cae595f57f296f3e43dbd0e5","sha256:7b73ceae683cfac0ce63533553bcc17f20a1828cea0eb862ef088bb3d43bbb09"],"state_sha256":"b47d6817dfc0a7f4af13b8820678145f4a12576798d5322154410b270263be0d"}