{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MAWBJ775K2B7TWDQARSISEYG6J","short_pith_number":"pith:MAWBJ775","canonical_record":{"source":{"id":"1605.07301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-24T06:00:04Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"9754c9eb3d2692a69569a5eb52a3be8323e847406ee4c60a9ec2b5d3b22c71de","abstract_canon_sha256":"b22b1bef1dd3c0c6070c020b905c46e312dec32383bfe2ca1b9d431e55328d0b"},"schema_version":"1.0"},"canonical_sha256":"602c14fffd5683f9d8700464891306f278233f545ed3a14dffb36dd569c89108","source":{"kind":"arxiv","id":"1605.07301","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.07301","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"arxiv_version","alias_value":"1605.07301v1","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.07301","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"pith_short_12","alias_value":"MAWBJ775K2B7","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MAWBJ775K2B7TWDQ","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MAWBJ775","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MAWBJ775K2B7TWDQARSISEYG6J","target":"record","payload":{"canonical_record":{"source":{"id":"1605.07301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-24T06:00:04Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"9754c9eb3d2692a69569a5eb52a3be8323e847406ee4c60a9ec2b5d3b22c71de","abstract_canon_sha256":"b22b1bef1dd3c0c6070c020b905c46e312dec32383bfe2ca1b9d431e55328d0b"},"schema_version":"1.0"},"canonical_sha256":"602c14fffd5683f9d8700464891306f278233f545ed3a14dffb36dd569c89108","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:41.031695Z","signature_b64":"zNzF77rGnpE8KjS9CBbd5vhMkMDjlKPNuPbfUep+8NVSOkHG7kYpcUwiEBr5L63D9vM7D9m1tv9nmA0yv5v/CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"602c14fffd5683f9d8700464891306f278233f545ed3a14dffb36dd569c89108","last_reissued_at":"2026-05-18T01:08:41.031121Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:41.031121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.07301","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":"2026-05-18T01:08:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SmfDAomsofPQXW+lYr2lUDtGDQFCMoQqVZ410ezn4GXyRWCjQEtAWW+aeAJn0FHgRdSrlPzlcF/tDpd1WbkEDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:07:22.985547Z"},"content_sha256":"dc11ac6db0b9c15eb5fa5b61e82f44967c42a01e29ed88e3e6cc8163b936bc3f","schema_version":"1.0","event_id":"sha256:dc11ac6db0b9c15eb5fa5b61e82f44967c42a01e29ed88e3e6cc8163b936bc3f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MAWBJ775K2B7TWDQARSISEYG6J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Optical Variability of SDSS Quasars from Multi-epoch Spectroscopy. III. A Sudden UV Cutoff in Quasar SDSS J2317+0005","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Bei You, Hengxiao Guo, Jingzhe Ma, J. Xavier Prochaska, Linlin Li, Mai Liao, Matthew A. Malkan, Minfeng Gu, Tayyaba Zafar","submitted_at":"2016-05-24T06:00:04Z","abstract_excerpt":"We have collected near-infrared to X-ray data of 20 multi-epoch heavily reddened SDSS quasars to investigate the physical mechanism of reddening. Of these, J2317+0005 is found to be a UV cutoff quasar. Its continuum, which usually appears normal, decreases by a factor 3.5 at 3000{\\AA}, compared to its more typical bright state during an interval of 23 days. During this sudden continuum cut-off, the broad emission line fluxes do not change, perhaps due to the large size of the Broad Line Region (BLR), r > 23 / (1+z) days. The UV continuum may have suffered a dramatic drop out. However, there ar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.07301","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":"2026-05-18T01:08:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+gaMb3T/azNSkuQ89A1R0ebyvx81ZK02ZJpOKrsgnQYcBUPXLmo6ayQUfZLhrO8rxxN0mPC09V3u7e2ToSjpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:07:22.986191Z"},"content_sha256":"5f4e6c5363f3b70c8d5c3c218f9c20de425d4c2b64e646a787decec1ee26ef81","schema_version":"1.0","event_id":"sha256:5f4e6c5363f3b70c8d5c3c218f9c20de425d4c2b64e646a787decec1ee26ef81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MAWBJ775K2B7TWDQARSISEYG6J/bundle.json","state_url":"https://pith.science/pith/MAWBJ775K2B7TWDQARSISEYG6J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MAWBJ775K2B7TWDQARSISEYG6J/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":"2026-05-19T01:07:22Z","links":{"resolver":"https://pith.science/pith/MAWBJ775K2B7TWDQARSISEYG6J","bundle":"https://pith.science/pith/MAWBJ775K2B7TWDQARSISEYG6J/bundle.json","state":"https://pith.science/pith/MAWBJ775K2B7TWDQARSISEYG6J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MAWBJ775K2B7TWDQARSISEYG6J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MAWBJ775K2B7TWDQARSISEYG6J","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":"b22b1bef1dd3c0c6070c020b905c46e312dec32383bfe2ca1b9d431e55328d0b","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":"2016-05-24T06:00:04Z","title_canon_sha256":"9754c9eb3d2692a69569a5eb52a3be8323e847406ee4c60a9ec2b5d3b22c71de"},"schema_version":"1.0","source":{"id":"1605.07301","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.07301","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"arxiv_version","alias_value":"1605.07301v1","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.07301","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"pith_short_12","alias_value":"MAWBJ775K2B7","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MAWBJ775K2B7TWDQ","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MAWBJ775","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:5f4e6c5363f3b70c8d5c3c218f9c20de425d4c2b64e646a787decec1ee26ef81","target":"graph","created_at":"2026-05-18T01:08:41Z","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 have collected near-infrared to X-ray data of 20 multi-epoch heavily reddened SDSS quasars to investigate the physical mechanism of reddening. Of these, J2317+0005 is found to be a UV cutoff quasar. Its continuum, which usually appears normal, decreases by a factor 3.5 at 3000{\\AA}, compared to its more typical bright state during an interval of 23 days. During this sudden continuum cut-off, the broad emission line fluxes do not change, perhaps due to the large size of the Broad Line Region (BLR), r > 23 / (1+z) days. The UV continuum may have suffered a dramatic drop out. However, there ar","authors_text":"Bei You, Hengxiao Guo, Jingzhe Ma, J. Xavier Prochaska, Linlin Li, Mai Liao, Matthew A. Malkan, Minfeng Gu, Tayyaba Zafar","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":"2016-05-24T06:00:04Z","title":"The Optical Variability of SDSS Quasars from Multi-epoch Spectroscopy. III. A Sudden UV Cutoff in Quasar SDSS J2317+0005"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.07301","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:dc11ac6db0b9c15eb5fa5b61e82f44967c42a01e29ed88e3e6cc8163b936bc3f","target":"record","created_at":"2026-05-18T01:08:41Z","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":"b22b1bef1dd3c0c6070c020b905c46e312dec32383bfe2ca1b9d431e55328d0b","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":"2016-05-24T06:00:04Z","title_canon_sha256":"9754c9eb3d2692a69569a5eb52a3be8323e847406ee4c60a9ec2b5d3b22c71de"},"schema_version":"1.0","source":{"id":"1605.07301","kind":"arxiv","version":1}},"canonical_sha256":"602c14fffd5683f9d8700464891306f278233f545ed3a14dffb36dd569c89108","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"602c14fffd5683f9d8700464891306f278233f545ed3a14dffb36dd569c89108","first_computed_at":"2026-05-18T01:08:41.031121Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:41.031121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zNzF77rGnpE8KjS9CBbd5vhMkMDjlKPNuPbfUep+8NVSOkHG7kYpcUwiEBr5L63D9vM7D9m1tv9nmA0yv5v/CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:41.031695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.07301","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc11ac6db0b9c15eb5fa5b61e82f44967c42a01e29ed88e3e6cc8163b936bc3f","sha256:5f4e6c5363f3b70c8d5c3c218f9c20de425d4c2b64e646a787decec1ee26ef81"],"state_sha256":"3fc83d45628d1fe00aaa297db1f269911d743045cd0d9ae5ee8d95992385c1d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Aoh5FcuZxNFOnUPo5/bhp/tXrwjnn/5nx02d4c1XmuZapBc9ttLhSdOuHRuI8K0HLMizGm4/Ke0XwVhGj9TBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T01:07:22.988279Z","bundle_sha256":"06a5abb91931a44038a30968f40707572ec6a0d5cabf2bf641566de44de42947"}}