{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:NWDAVGF3Q3XF7XLASPVBCAX2IU","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":"15c8885b0885f4499fd98fa7e44f29a031a3b74c5730ac9a684d9895df72f847","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-03T08:50:54Z","title_canon_sha256":"334edc766e5a922bfd9b95fc6df87786f5f8a66e01ef93d0752e0ac9c01edf8e"},"schema_version":"1.0","source":{"id":"1209.0274","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0274","created_at":"2026-05-18T01:54:48Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0274v1","created_at":"2026-05-18T01:54:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0274","created_at":"2026-05-18T01:54:48Z"},{"alias_kind":"pith_short_12","alias_value":"NWDAVGF3Q3XF","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NWDAVGF3Q3XF7XLA","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NWDAVGF3","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:337dc3cec8759f71a5ca9aa609dd4eca3e8a83a1d1701b4affa391867a2c070f","target":"graph","created_at":"2026-05-18T01:54:48Z","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":"We present the results of a campaign of simultaneous X-ray and optical observations of `true' Type 2 Seyfert galaxies candidates, i.e. AGN without a Broad Line Region (BLR). Out of the initial sample composed by 8 sources, one object, IC1631, was found to be a misclassified starburst galaxy, another, Q2130-431, does show broad optical lines, while other two, IRAS01428-0404 and NGC4698, are very likely absorbed by Compton-thick gas along the line of sight. Therefore, these four sources are not unabsorbed Seyfert 2s as previously suggested in the literature. On the other hand, we confirm that NG","authors_text":"Amalia Corral, Angel Ruiz, Anna Wolter, Fabio La Franca, Francesca Onori, Francesca Panessa, Francisco J. Carrera, Giorgio Matt, Lorenzo Monaco, Murray Brightman, Stefano Bianchi, Xavier Barcons","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-03T08:50:54Z","title":"Simultaneous X-ray and optical observations of true Type 2 Seyfert galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0274","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:d94b30996faf1182fe9b50cc3f12285f9795927f5c991afd03942f91ce46a5f8","target":"record","created_at":"2026-05-18T01:54:48Z","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":"15c8885b0885f4499fd98fa7e44f29a031a3b74c5730ac9a684d9895df72f847","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-03T08:50:54Z","title_canon_sha256":"334edc766e5a922bfd9b95fc6df87786f5f8a66e01ef93d0752e0ac9c01edf8e"},"schema_version":"1.0","source":{"id":"1209.0274","kind":"arxiv","version":1}},"canonical_sha256":"6d860a98bb86ee5fdd6093ea1102fa452c56f834cba7176d643747bae27bef0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d860a98bb86ee5fdd6093ea1102fa452c56f834cba7176d643747bae27bef0e","first_computed_at":"2026-05-18T01:54:48.213103Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:48.213103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KnERK0MLqG6sjaQGIs6BDlJSZjhbgDSEFwSZnR19K1dGA5y9gRDLo3UV9CeYZROSuwbaEW2/jXLsIM8TRX5YBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:48.213869Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.0274","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d94b30996faf1182fe9b50cc3f12285f9795927f5c991afd03942f91ce46a5f8","sha256:337dc3cec8759f71a5ca9aa609dd4eca3e8a83a1d1701b4affa391867a2c070f"],"state_sha256":"4deed01870767d78379baf4a284a867ad53d88fc79f3dc738b63f2aae5c9835c"}