{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:TGFSFPL6RDAB37MQSQCHUCMBCL","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":"17ececcb624fdcd5a9b5157b9c80b882043dbe67c9675fa6488e395e7849d311","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-20T20:19:32Z","title_canon_sha256":"b255e96c96cad849b34a5df206c53a33f9f96de8cd04da6c35fe6cd11b43cf31"},"schema_version":"1.0","source":{"id":"1209.4660","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.4660","created_at":"2026-05-18T03:45:10Z"},{"alias_kind":"arxiv_version","alias_value":"1209.4660v1","created_at":"2026-05-18T03:45:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.4660","created_at":"2026-05-18T03:45:10Z"},{"alias_kind":"pith_short_12","alias_value":"TGFSFPL6RDAB","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TGFSFPL6RDAB37MQ","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TGFSFPL6","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:4bc34057717b73fd104da7070c48ff72a4f7a07ab05ec1f3e910932e093fd1fb","target":"graph","created_at":"2026-05-18T03:45:10Z","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":"[Abridged] Sub-mm observations of the William Herschel Deep Field using LABOCA revealed possible counterparts for 2 X-ray absorbed QSOs. The aim here is to exploit EVLA imaging at 8.4 GHz to establish the QSOs as radio/sub-mm sources. The challenge in reducing the EVLA data was the presence of a strong 4C source in the field. A new calibration algorithm was applied to the data to subtract it. The resulting thermal noise limited radio map covers the 16'x16' Extended WHDF. It contains 41 sources above a 4-sigma limit, 17 of which have primary beam corrected flux. The radio observations show that","authors_text":"I. Heywood, M. D. Hill, N. Metcalfe, O. M. Smirnov, R. M. Bielby, S. Rawlings, T. Shanks","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-20T20:19:32Z","title":"Sub-millimetre source identifications and the micro-Jansky source population at 8.4 GHz in the William Herschel Deep Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.4660","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":"sha256:660903931097f0080083909cda2c5fb950b47d57aed6cad252e073725ef03487","target":"record","created_at":"2026-05-18T03:45:10Z","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":"17ececcb624fdcd5a9b5157b9c80b882043dbe67c9675fa6488e395e7849d311","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-20T20:19:32Z","title_canon_sha256":"b255e96c96cad849b34a5df206c53a33f9f96de8cd04da6c35fe6cd11b43cf31"},"schema_version":"1.0","source":{"id":"1209.4660","kind":"arxiv","version":1}},"canonical_sha256":"998b22bd7e88c01dfd9094047a098112fd85f373becc9f7d919d49663f7f68e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"998b22bd7e88c01dfd9094047a098112fd85f373becc9f7d919d49663f7f68e2","first_computed_at":"2026-05-18T03:45:10.330685Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:45:10.330685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zgvYiA3Bxj/DknCar1kPM589xNWFafXaOrPsw6Kc9EuTkmLbmbCuJ5+s7EcZkR7K6kYePzOjRmZiFOQ3oDUVAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:45:10.331398Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.4660","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:660903931097f0080083909cda2c5fb950b47d57aed6cad252e073725ef03487","sha256:4bc34057717b73fd104da7070c48ff72a4f7a07ab05ec1f3e910932e093fd1fb"],"state_sha256":"e2c8924c5e63328f216c28a8fafe1ff959a305513d2004e2b7d01a6704e41224"}