{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:DWHB72V2XHHJGNJHAFWKTIB3MR","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":"ec2e3a252f19590054738472e14a226e18cd192e0a88609b2ef3b6f7b620d1fc","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-08T18:00:01Z","title_canon_sha256":"d35b022c5ecf33f454e9e1f14dd1f47a744a11140b19422b2ce3d25f4d929f13"},"schema_version":"1.0","source":{"id":"2606.09981","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.09981","created_at":"2026-06-10T00:08:36Z"},{"alias_kind":"arxiv_version","alias_value":"2606.09981v1","created_at":"2026-06-10T00:08:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.09981","created_at":"2026-06-10T00:08:36Z"},{"alias_kind":"pith_short_12","alias_value":"DWHB72V2XHHJ","created_at":"2026-06-10T00:08:36Z"},{"alias_kind":"pith_short_16","alias_value":"DWHB72V2XHHJGNJH","created_at":"2026-06-10T00:08:36Z"},{"alias_kind":"pith_short_8","alias_value":"DWHB72V2","created_at":"2026-06-10T00:08:36Z"}],"graph_snapshots":[{"event_id":"sha256:ada186844c43d895303870d714a4af9aad8aac1998de72e842dd8757a13341fd","target":"graph","created_at":"2026-06-10T00:08:36Z","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/2606.09981/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a systematic X-ray analysis of the narrow-line Type 1 quasar PHL 1811, which has long been regarded as the prototype of intrinsically X-ray weak quasars. A critical breakthrough came with the first detection of a bright X-ray flare from this source by the Einstein Probe (EP) in 2024. We utilize archival X-ray observations spanning 2001-2024, including the post-flare EP and Swift data. We confirm that PHL 1811 shows X-ray weakness factors $f_{\\rm weak} \\approx 23$-179 across all epochs before 2024. The 2024 EP flare marks the first detection of an X-ray nominal state with $f_{\\rm wea","authors_text":"B. Luo, Jian Huang, Qingling Ni, W. N. Brandt, Xiaolei Chen","cross_cats":["astro-ph.CO","astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-08T18:00:01Z","title":"The Curious Case of PHL 1811: Heavy Obscuration Versus Intrinsic X-ray Weakness"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.09981","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":"sha256:54989a4688fdc9a1329aa107f7d55dc35fd1d83208e552c16ca12706b8035bdb","target":"record","created_at":"2026-06-10T00:08:36Z","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":"ec2e3a252f19590054738472e14a226e18cd192e0a88609b2ef3b6f7b620d1fc","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-08T18:00:01Z","title_canon_sha256":"d35b022c5ecf33f454e9e1f14dd1f47a744a11140b19422b2ce3d25f4d929f13"},"schema_version":"1.0","source":{"id":"2606.09981","kind":"arxiv","version":1}},"canonical_sha256":"1d8e1feabab9ce933527016ca9a03b64522f36f06845a79a00f7ce17a4887ec9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1d8e1feabab9ce933527016ca9a03b64522f36f06845a79a00f7ce17a4887ec9","first_computed_at":"2026-06-10T00:08:36.695822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-10T00:08:36.695822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yAuTw7FknnZqITHDf0PWp7gwyNzRveTFFe0jBiFmWCp7uhHuQ3ACFoUN86V2cDqt6VvyMsDpWEO88GFtcwWbCw==","signature_status":"signed_v1","signed_at":"2026-06-10T00:08:36.696829Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.09981","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54989a4688fdc9a1329aa107f7d55dc35fd1d83208e552c16ca12706b8035bdb","sha256:ada186844c43d895303870d714a4af9aad8aac1998de72e842dd8757a13341fd"],"state_sha256":"41d3aa51816267f241c5c68e700edefef4335a8816a5afe6006863a74cb8982c"}