{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:H5KTU7VCMMAFLYEKKLZHGERUX6","short_pith_number":"pith:H5KTU7VC","schema_version":"1.0","canonical_sha256":"3f553a7ea2630055e08a52f2731234bfa389f972465456b39887cc1efcc73112","source":{"kind":"arxiv","id":"2212.04181","version":1},"attestation_state":"computed","paper":{"title":"Optical flux and spectral variability of BL Lacertae during its historical high outburst in 2020","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alok C. Gupta, Anton A. Strigachev, Hongyan Zhou, Junhui Fan, Lang Cui, Minfeng Gu, Nibedita Kalita, Peng Jiang, Rumen S. Bachev, Xiang Pan, Yosuke Mizuno, Yuhai Yuan","submitted_at":"2022-12-08T10:36:16Z","abstract_excerpt":"BL Lacertae had undergone a series of historical high flux activity over a year, from August 2020 in the optical to VHE $\\gamma$-rays. In this paper, we report on optical flux and spectral variability of the first historical maxima outburst event during October-November in g, r and i bands with the 1.26m telescope at Xinglong observatory, China. We detected significant intranight variations with amplitude rising up to $\\sim 30$%, when the fastest variability timescale is found to be a few tens of minutes, giving an emitting region size of the order $10^{-3}$ pc, which corresponds to $\\sim 100$"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2212.04181","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-12-08T10:36:16Z","cross_cats_sorted":[],"title_canon_sha256":"6d5419985f28c639400e966fbbaf292a7f49e300338176b29c41ac4e7831231b","abstract_canon_sha256":"ed4a33c38258e77d93637d392347ee456b115d4767645e87b45750b4a6d194fd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:39:27.387382Z","signature_b64":"vm0/oiVSUIpFaYjN+V8ADGzSDfQx4WiVco02K+lnwMo7bPrgceY96/YmwJ55/5T+R0GzPGwkr295dWN10JQzBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f553a7ea2630055e08a52f2731234bfa389f972465456b39887cc1efcc73112","last_reissued_at":"2026-07-05T05:39:27.386913Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:39:27.386913Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical flux and spectral variability of BL Lacertae during its historical high outburst in 2020","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alok C. Gupta, Anton A. Strigachev, Hongyan Zhou, Junhui Fan, Lang Cui, Minfeng Gu, Nibedita Kalita, Peng Jiang, Rumen S. Bachev, Xiang Pan, Yosuke Mizuno, Yuhai Yuan","submitted_at":"2022-12-08T10:36:16Z","abstract_excerpt":"BL Lacertae had undergone a series of historical high flux activity over a year, from August 2020 in the optical to VHE $\\gamma$-rays. In this paper, we report on optical flux and spectral variability of the first historical maxima outburst event during October-November in g, r and i bands with the 1.26m telescope at Xinglong observatory, China. We detected significant intranight variations with amplitude rising up to $\\sim 30$%, when the fastest variability timescale is found to be a few tens of minutes, giving an emitting region size of the order $10^{-3}$ pc, which corresponds to $\\sim 100$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.04181","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2212.04181/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2212.04181","created_at":"2026-07-05T05:39:27.386971+00:00"},{"alias_kind":"arxiv_version","alias_value":"2212.04181v1","created_at":"2026-07-05T05:39:27.386971+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.04181","created_at":"2026-07-05T05:39:27.386971+00:00"},{"alias_kind":"pith_short_12","alias_value":"H5KTU7VCMMAF","created_at":"2026-07-05T05:39:27.386971+00:00"},{"alias_kind":"pith_short_16","alias_value":"H5KTU7VCMMAFLYEK","created_at":"2026-07-05T05:39:27.386971+00:00"},{"alias_kind":"pith_short_8","alias_value":"H5KTU7VC","created_at":"2026-07-05T05:39:27.386971+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6","json":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6.json","graph_json":"https://pith.science/api/pith-number/H5KTU7VCMMAFLYEKKLZHGERUX6/graph.json","events_json":"https://pith.science/api/pith-number/H5KTU7VCMMAFLYEKKLZHGERUX6/events.json","paper":"https://pith.science/paper/H5KTU7VC"},"agent_actions":{"view_html":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6","download_json":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6.json","view_paper":"https://pith.science/paper/H5KTU7VC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2212.04181&json=true","fetch_graph":"https://pith.science/api/pith-number/H5KTU7VCMMAFLYEKKLZHGERUX6/graph.json","fetch_events":"https://pith.science/api/pith-number/H5KTU7VCMMAFLYEKKLZHGERUX6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6/action/storage_attestation","attest_author":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6/action/author_attestation","sign_citation":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6/action/citation_signature","submit_replication":"https://pith.science/pith/H5KTU7VCMMAFLYEKKLZHGERUX6/action/replication_record"}},"created_at":"2026-07-05T05:39:27.386971+00:00","updated_at":"2026-07-05T05:39:27.386971+00:00"}