{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:FFT4WSAUHLGCHJVYF3QY2WW4O6","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":"eb6f09823de6660f45574403b515f193027613de9b9bb242a12edf2b17707214","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:28:52Z","title_canon_sha256":"a94eebef5d81ca218066fe2662da31b5f314084abcc0f12c7ae6a8633ecca67c"},"schema_version":"1.0","source":{"id":"astro-ph/9709142","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9709142","created_at":"2026-05-18T01:07:38Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9709142v1","created_at":"2026-05-18T01:07:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9709142","created_at":"2026-05-18T01:07:38Z"},{"alias_kind":"pith_short_12","alias_value":"FFT4WSAUHLGC","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"FFT4WSAUHLGCHJVY","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"FFT4WSAU","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:813455a97f34995bda3108427f7de31859fa83178c5403b1584941efe0c0a7da","target":"graph","created_at":"2026-05-18T01:07:38Z","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":"The ROSAT Deep Survey in the Lockman Hole is the most sensitive X-ray survey performed to date, encompassing an exposure time of 207 ksec with the PSPC and a total of 1.32 Msec with the HRI aboard ROSAT. Here we present the complete catalogue of 50 X-ray sources with PSPC fluxes (0.5--2 keV) above $ 5.5 \\times 10^{-15} erg cm^{-2} s^{-1}$. The optical identifications are discussed in an accompanying paper (Schmidt et al., 1997). We also derive a new log(N)--log(S) function reaching a source density of $970 \\pm 150  deg^{-2}$ at a limiting flux of $10^{-15} erg cm^{-2} s^{-1}$. At this level 70","authors_text":"(2) Johns Hopkins University, (3) ESO Garching, (4) Caltech, (5) MPE Garching, (6) Bologna Observatory), & Gianni Zamorani (6) ((1) Astrophysikalisches Inst. Potsdam, Guenther Hasinger (1), Joachim Truemper (5), Maarten Schmidt (4), Riccardo Giacconi (3), Richard Burg (2)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:28:52Z","title":"The ROSAT Deep Survey I. X-ray sources in the Lockman Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9709142","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:f0e59b1689ad52778a903509d7bb7364df775cd047472318a3137552022f7d77","target":"record","created_at":"2026-05-18T01:07:38Z","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":"eb6f09823de6660f45574403b515f193027613de9b9bb242a12edf2b17707214","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-09-15T18:28:52Z","title_canon_sha256":"a94eebef5d81ca218066fe2662da31b5f314084abcc0f12c7ae6a8633ecca67c"},"schema_version":"1.0","source":{"id":"astro-ph/9709142","kind":"arxiv","version":1}},"canonical_sha256":"2967cb48143acc23a6b82ee18d5adc77a9e4e9cc0a819c3a79ece87ac30ccb40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2967cb48143acc23a6b82ee18d5adc77a9e4e9cc0a819c3a79ece87ac30ccb40","first_computed_at":"2026-05-18T01:07:38.104333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:38.104333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KPooMkK6Y/Wo/QZCpx2EcCE1ooJFsl7Am+haGQAtmk2TEbLkIfflnn5S1m05Dq4rL9SUkk4V51Wu3Z/Ig1sSBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:38.104967Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9709142","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0e59b1689ad52778a903509d7bb7364df775cd047472318a3137552022f7d77","sha256:813455a97f34995bda3108427f7de31859fa83178c5403b1584941efe0c0a7da"],"state_sha256":"9d60028791c6cb1445d6824932fbdb64cb977aeb6168bc06254bb2842f79f44e"}