{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SCVCACA4PZ4XI2YVKWCFRPECXL","short_pith_number":"pith:SCVCACA4","canonical_record":{"source":{"id":"1309.2429","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-09-10T09:31:38Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"09d7f1b4b8050cdf6653f0059a3dbf3f4c729dccf96a8c3fc27eb1abf71a064b","abstract_canon_sha256":"840798f7e6ef0f1be625e87266d51601a3a350c14b3af76dd48af63ac99836b6"},"schema_version":"1.0"},"canonical_sha256":"90aa20081c7e79746b15558458bc82bac002e10ae4a9b51ea1af7b3563bc8479","source":{"kind":"arxiv","id":"1309.2429","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.2429","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"arxiv_version","alias_value":"1309.2429v1","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.2429","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"pith_short_12","alias_value":"SCVCACA4PZ4X","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SCVCACA4PZ4XI2YV","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SCVCACA4","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SCVCACA4PZ4XI2YVKWCFRPECXL","target":"record","payload":{"canonical_record":{"source":{"id":"1309.2429","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-09-10T09:31:38Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"09d7f1b4b8050cdf6653f0059a3dbf3f4c729dccf96a8c3fc27eb1abf71a064b","abstract_canon_sha256":"840798f7e6ef0f1be625e87266d51601a3a350c14b3af76dd48af63ac99836b6"},"schema_version":"1.0"},"canonical_sha256":"90aa20081c7e79746b15558458bc82bac002e10ae4a9b51ea1af7b3563bc8479","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:01:56.152720Z","signature_b64":"Uq85N20zJAtF0DcnzjuznvkCQHUWQ2V86VogvaG87Syh+4TFgwdS8haPa/Ny1CXVVOO6f+ltXnpzzxNjqI5VCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90aa20081c7e79746b15558458bc82bac002e10ae4a9b51ea1af7b3563bc8479","last_reissued_at":"2026-05-18T03:01:56.151992Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:01:56.151992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.2429","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":"2026-05-18T03:01:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7PAsQTwQPYxxJ3VXQOeZsMHH5VkG47tE4qaYZbPgBUBHNp+Rnyp/5wmjB+9M60Af0HdE9d+h7a4LiUnRDuUTDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:52:00.749210Z"},"content_sha256":"9398a006116c65c50d76919e352a2fcabb916c8fc0bf948b74628365a8e66e8b","schema_version":"1.0","event_id":"sha256:9398a006116c65c50d76919e352a2fcabb916c8fc0bf948b74628365a8e66e8b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SCVCACA4PZ4XI2YVKWCFRPECXL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Variability and spectral variation of 3C 66A","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"H. Y. Guo, Jianghua Wu, Shao Ming Hu, X. Zhang, X. Zhou, Y. G. Zheng","submitted_at":"2013-09-10T09:31:38Z","abstract_excerpt":"3C 66A was monitored by the BATC(Beijing-Arizona-Taipei-Connecticut) telescope from 2005 to 2008,1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observations in this paper. A long term burst occurred in the whole light curve. No intra-day variability was claimed in our campaign by intra-night light curve analysis. Time lag of shorter wavelenth preceding longer wavelength was shown by correlation analysis. The results showed that the optical spectral shape turned flatter when the source brightened, and the spectral variability indicator was bi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2429","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":"2026-05-18T03:01:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KJS3sEuQne1mFTHknRk7VSnLmNwTlw9GS/mjAUqTR1biCJvdUozb2pGFXPt3lZ0w6S2+LeIcnNfdTeDkZIIKBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:52:00.749757Z"},"content_sha256":"d6d37068a7f1d30a5234906d5d742e75edf5e8c8df3994e00f67ad604d949e13","schema_version":"1.0","event_id":"sha256:d6d37068a7f1d30a5234906d5d742e75edf5e8c8df3994e00f67ad604d949e13"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/bundle.json","state_url":"https://pith.science/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/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":"2026-06-03T09:52:00Z","links":{"resolver":"https://pith.science/pith/SCVCACA4PZ4XI2YVKWCFRPECXL","bundle":"https://pith.science/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/bundle.json","state":"https://pith.science/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SCVCACA4PZ4XI2YVKWCFRPECXL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SCVCACA4PZ4XI2YVKWCFRPECXL","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":"840798f7e6ef0f1be625e87266d51601a3a350c14b3af76dd48af63ac99836b6","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-09-10T09:31:38Z","title_canon_sha256":"09d7f1b4b8050cdf6653f0059a3dbf3f4c729dccf96a8c3fc27eb1abf71a064b"},"schema_version":"1.0","source":{"id":"1309.2429","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.2429","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"arxiv_version","alias_value":"1309.2429v1","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.2429","created_at":"2026-05-18T03:01:56Z"},{"alias_kind":"pith_short_12","alias_value":"SCVCACA4PZ4X","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SCVCACA4PZ4XI2YV","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SCVCACA4","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:d6d37068a7f1d30a5234906d5d742e75edf5e8c8df3994e00f67ad604d949e13","target":"graph","created_at":"2026-05-18T03:01:56Z","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":"3C 66A was monitored by the BATC(Beijing-Arizona-Taipei-Connecticut) telescope from 2005 to 2008,1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observations in this paper. A long term burst occurred in the whole light curve. No intra-day variability was claimed in our campaign by intra-night light curve analysis. Time lag of shorter wavelenth preceding longer wavelength was shown by correlation analysis. The results showed that the optical spectral shape turned flatter when the source brightened, and the spectral variability indicator was bi","authors_text":"H. Y. Guo, Jianghua Wu, Shao Ming Hu, X. Zhang, X. Zhou, Y. G. Zheng","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-09-10T09:31:38Z","title":"Variability and spectral variation of 3C 66A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2429","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":"sha256:9398a006116c65c50d76919e352a2fcabb916c8fc0bf948b74628365a8e66e8b","target":"record","created_at":"2026-05-18T03:01:56Z","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":"840798f7e6ef0f1be625e87266d51601a3a350c14b3af76dd48af63ac99836b6","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-09-10T09:31:38Z","title_canon_sha256":"09d7f1b4b8050cdf6653f0059a3dbf3f4c729dccf96a8c3fc27eb1abf71a064b"},"schema_version":"1.0","source":{"id":"1309.2429","kind":"arxiv","version":1}},"canonical_sha256":"90aa20081c7e79746b15558458bc82bac002e10ae4a9b51ea1af7b3563bc8479","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"90aa20081c7e79746b15558458bc82bac002e10ae4a9b51ea1af7b3563bc8479","first_computed_at":"2026-05-18T03:01:56.151992Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:01:56.151992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Uq85N20zJAtF0DcnzjuznvkCQHUWQ2V86VogvaG87Syh+4TFgwdS8haPa/Ny1CXVVOO6f+ltXnpzzxNjqI5VCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:01:56.152720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.2429","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9398a006116c65c50d76919e352a2fcabb916c8fc0bf948b74628365a8e66e8b","sha256:d6d37068a7f1d30a5234906d5d742e75edf5e8c8df3994e00f67ad604d949e13"],"state_sha256":"ac83736b4d34a21e63f7cf32eaab76fb48e4855c807a2bb76ed6f7c2b1da0471"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lAbE8lLWwqvDMQZGs30el3+Z+PelZOsWZZbPPsBkVOrfd5+M2AnBgIDkN1qK+q3CIVGzeuJp2iPl/955loUwAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T09:52:00.752338Z","bundle_sha256":"0b0b149cc464259e15cdb4581bd2f8b0dee8591e961c5461c768bb77e2b1c439"}}