{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VGFL3I4BUBDWPYYTIDOT6HVK47","short_pith_number":"pith:VGFL3I4B","canonical_record":{"source":{"id":"1201.3627","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-17T21:00:12Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"58d400385bf8033b604aa10ee9b2a23f3b5316eaef061fbc94341fc61e827236","abstract_canon_sha256":"567454c807e87ef156750abca5c757eab9150b1b2ebbeea98ab2f9361177750a"},"schema_version":"1.0"},"canonical_sha256":"a98abda381a04767e31340dd3f1eaae7e19c91fcd0af06e1f3026e755bff295f","source":{"kind":"arxiv","id":"1201.3627","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.3627","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"arxiv_version","alias_value":"1201.3627v1","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.3627","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"pith_short_12","alias_value":"VGFL3I4BUBDW","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VGFL3I4BUBDWPYYT","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VGFL3I4B","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VGFL3I4BUBDWPYYTIDOT6HVK47","target":"record","payload":{"canonical_record":{"source":{"id":"1201.3627","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-17T21:00:12Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"58d400385bf8033b604aa10ee9b2a23f3b5316eaef061fbc94341fc61e827236","abstract_canon_sha256":"567454c807e87ef156750abca5c757eab9150b1b2ebbeea98ab2f9361177750a"},"schema_version":"1.0"},"canonical_sha256":"a98abda381a04767e31340dd3f1eaae7e19c91fcd0af06e1f3026e755bff295f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:20:11.083755Z","signature_b64":"WFt2LaFKE/h3sSlTkYSweBxbXYmTZJYLE9CqmI/S4mdDH2oKbayoAOtiyIgzjbNK3JCuTcH0r5B0CdKT815rCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a98abda381a04767e31340dd3f1eaae7e19c91fcd0af06e1f3026e755bff295f","last_reissued_at":"2026-05-18T02:20:11.083016Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:20:11.083016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.3627","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:20:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2ANN++x1eDYB0DbEHtDsYdvIGMlH1qg7Vaty3/8aNgINiheHQvTns55YNPTW++swKxPJaQtsDf7v5NRWHhYlAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:33:06.720233Z"},"content_sha256":"403ff5665429ab26a52da7b437fd5dc49f87642c9d5c1a13c6ac2ac91cfd343f","schema_version":"1.0","event_id":"sha256:403ff5665429ab26a52da7b437fd5dc49f87642c9d5c1a13c6ac2ac91cfd343f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VGFL3I4BUBDWPYYTIDOT6HVK47","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PHL 1811 Analogs: A Population of X-ray Weak Quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"Dennis W. Just, Donald P. Schneider, Gordon T. Richards, Jianfeng Wu, Ohad Shemmer, Patrick B. Hall, Robert R. Gibson, Sarah J. Schmidt, W. N. Brandt","submitted_at":"2012-01-17T21:00:12Z","abstract_excerpt":"We report on a population of X-ray weak quasars with similar UV emission-line properties to those of the remarkable quasar PHL 1811. All radio-quiet PHL 1811 analogs are notably X-ray weak by a mean factor of ~13, with hints of heavy X-ray absorption. Correlations between the X-ray weakness and UV emission-line properties suggest that PHL 1811 analogs may have extreme wind-dominated broad emission-line regions (BELRs). We propose an AGN geometry that can potentially unify the PHL 1811 analogs and the general population of weak-line quasars."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.3627","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:20:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ZRGaxNxpri+WANAFZKhRvnuFYD25rSL4b/YVnAMJy+UaJhQU/YomaxRp1d/hpazg1NWRnnEbvLWc2vHjtlbDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:33:06.720905Z"},"content_sha256":"0331e742f8f039b87499fff0f1d36aca97e5a0acbb7ee4baa59137109ab14161","schema_version":"1.0","event_id":"sha256:0331e742f8f039b87499fff0f1d36aca97e5a0acbb7ee4baa59137109ab14161"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/bundle.json","state_url":"https://pith.science/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T22:33:06Z","links":{"resolver":"https://pith.science/pith/VGFL3I4BUBDWPYYTIDOT6HVK47","bundle":"https://pith.science/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/bundle.json","state":"https://pith.science/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGFL3I4BUBDWPYYTIDOT6HVK47/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VGFL3I4BUBDWPYYTIDOT6HVK47","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":"567454c807e87ef156750abca5c757eab9150b1b2ebbeea98ab2f9361177750a","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-17T21:00:12Z","title_canon_sha256":"58d400385bf8033b604aa10ee9b2a23f3b5316eaef061fbc94341fc61e827236"},"schema_version":"1.0","source":{"id":"1201.3627","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.3627","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"arxiv_version","alias_value":"1201.3627v1","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.3627","created_at":"2026-05-18T02:20:11Z"},{"alias_kind":"pith_short_12","alias_value":"VGFL3I4BUBDW","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VGFL3I4BUBDWPYYT","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VGFL3I4B","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:0331e742f8f039b87499fff0f1d36aca97e5a0acbb7ee4baa59137109ab14161","target":"graph","created_at":"2026-05-18T02:20:11Z","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 report on a population of X-ray weak quasars with similar UV emission-line properties to those of the remarkable quasar PHL 1811. All radio-quiet PHL 1811 analogs are notably X-ray weak by a mean factor of ~13, with hints of heavy X-ray absorption. Correlations between the X-ray weakness and UV emission-line properties suggest that PHL 1811 analogs may have extreme wind-dominated broad emission-line regions (BELRs). We propose an AGN geometry that can potentially unify the PHL 1811 analogs and the general population of weak-line quasars.","authors_text":"Dennis W. Just, Donald P. Schneider, Gordon T. Richards, Jianfeng Wu, Ohad Shemmer, Patrick B. Hall, Robert R. Gibson, Sarah J. Schmidt, W. N. Brandt","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-17T21:00:12Z","title":"PHL 1811 Analogs: A Population of X-ray Weak Quasars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.3627","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":"sha256:403ff5665429ab26a52da7b437fd5dc49f87642c9d5c1a13c6ac2ac91cfd343f","target":"record","created_at":"2026-05-18T02:20:11Z","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":"567454c807e87ef156750abca5c757eab9150b1b2ebbeea98ab2f9361177750a","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-17T21:00:12Z","title_canon_sha256":"58d400385bf8033b604aa10ee9b2a23f3b5316eaef061fbc94341fc61e827236"},"schema_version":"1.0","source":{"id":"1201.3627","kind":"arxiv","version":1}},"canonical_sha256":"a98abda381a04767e31340dd3f1eaae7e19c91fcd0af06e1f3026e755bff295f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a98abda381a04767e31340dd3f1eaae7e19c91fcd0af06e1f3026e755bff295f","first_computed_at":"2026-05-18T02:20:11.083016Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:11.083016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WFt2LaFKE/h3sSlTkYSweBxbXYmTZJYLE9CqmI/S4mdDH2oKbayoAOtiyIgzjbNK3JCuTcH0r5B0CdKT815rCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:11.083755Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.3627","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:403ff5665429ab26a52da7b437fd5dc49f87642c9d5c1a13c6ac2ac91cfd343f","sha256:0331e742f8f039b87499fff0f1d36aca97e5a0acbb7ee4baa59137109ab14161"],"state_sha256":"f9bdfce4a3a94cd3af6dabbc6439b07bb01f6b84221b8027f3b8d0d6a39e91c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sd9WVk1MPwNrimFLL+X7cyUrKUO0XK2wW66BHD1EUEmjA7gNC5jNoglrRE2nHDOrSXy5cdYGhgRslLzoNI8SDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T22:33:06.724051Z","bundle_sha256":"02d6f26e32c05bb25a2b9ece4800ee19b6b789cfddcf0ab5ea003e95a49749b2"}}