{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:L6GRKGR4BAXQGAH6O5IKALGZ62","short_pith_number":"pith:L6GRKGR4","canonical_record":{"source":{"id":"1502.07502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-26T11:00:52Z","cross_cats_sorted":[],"title_canon_sha256":"84ba0c4182ca1dc9344f6b26d5fc200d89cfe656cc2487fb584605578a69bba5","abstract_canon_sha256":"aa74b6c897c38c40371f0ffcc67f6b8fd270cb8e22d08e9f3cef3ee0cadd924a"},"schema_version":"1.0"},"canonical_sha256":"5f8d151a3c082f0300fe7750a02cd9f691d34ed739fba8a715eb0978e5a2a4d4","source":{"kind":"arxiv","id":"1502.07502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07502","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07502v1","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07502","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"pith_short_12","alias_value":"L6GRKGR4BAXQ","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"L6GRKGR4BAXQGAH6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"L6GRKGR4","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:L6GRKGR4BAXQGAH6O5IKALGZ62","target":"record","payload":{"canonical_record":{"source":{"id":"1502.07502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-26T11:00:52Z","cross_cats_sorted":[],"title_canon_sha256":"84ba0c4182ca1dc9344f6b26d5fc200d89cfe656cc2487fb584605578a69bba5","abstract_canon_sha256":"aa74b6c897c38c40371f0ffcc67f6b8fd270cb8e22d08e9f3cef3ee0cadd924a"},"schema_version":"1.0"},"canonical_sha256":"5f8d151a3c082f0300fe7750a02cd9f691d34ed739fba8a715eb0978e5a2a4d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:03.504136Z","signature_b64":"YC+v3ePOqHXSIWBiJqwlKJdWc/CAJu9GY8OlMcZ9cEM8UKHLiQCFfkJGzYhZUBV+RqKiNAjRlYyejnG6WVdhDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f8d151a3c082f0300fe7750a02cd9f691d34ed739fba8a715eb0978e5a2a4d4","last_reissued_at":"2026-05-18T02:26:03.503530Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:03.503530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.07502","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":"2026-05-18T02:26:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nAd376kO+7FAi8rFwy/gI5aox0tJOFN0jKlgATlN3KfhGCRS9xBD8/xyoMsgIQ8CXbIVYJYtOXFtl6c3AEhYCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:21:43.455168Z"},"content_sha256":"f744ac23c147fdc72032f51ab1f0f64af1e22930daf164877b29df7c4a85276a","schema_version":"1.0","event_id":"sha256:f744ac23c147fdc72032f51ab1f0f64af1e22930daf164877b29df7c4a85276a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:L6GRKGR4BAXQGAH6O5IKALGZ62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The largest Swift AGN monitoring campaign: UV/optical variability in NGC 5548","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"D. Emmanoulopoulos, D.T. Cameron, E. Breedt, I.M. McHardy, J. Gelbord, P. Arevalo, P. Lira, P. Uttley, S.D. Connolly, T. Dwelly","submitted_at":"2015-02-26T11:00:52Z","abstract_excerpt":"We report on the largest Swift AGN monitoring program, concerning UV/optical variability in Seyferts. From 554 observations, over a 750d period, of the Seyfert galaxy NGC 5548, we see (McHardy et al. 2014) a good overall correlation between the X-ray and UV/optical bands,particularly on short timescales (tens of days). The UVOT bands are found to lag behind X-rays with a lag scaling as wavelength to the power 1.23 +/- 0.31, in excellent agreement with that expected (1.33) if UV/optical variability arises from reprocessing of X-rays by the accretion disc. However, the observed lags are ~3 times"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07502","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":"2026-05-18T02:26:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eBzQHKTyT2DvoUDxep5hYULqIUmmD7HiKyEs+DwDiyzP/RQu91ElwQyr/oh28JfezBrzLVJwQI6m934xdfm/CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:21:43.455912Z"},"content_sha256":"3d4f19ef9b0e73cdefa8d51a8a179fc6fc7828f57a2a466530f9378a12d1eacf","schema_version":"1.0","event_id":"sha256:3d4f19ef9b0e73cdefa8d51a8a179fc6fc7828f57a2a466530f9378a12d1eacf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/bundle.json","state_url":"https://pith.science/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/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":"2026-05-28T19:21:43Z","links":{"resolver":"https://pith.science/pith/L6GRKGR4BAXQGAH6O5IKALGZ62","bundle":"https://pith.science/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/bundle.json","state":"https://pith.science/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L6GRKGR4BAXQGAH6O5IKALGZ62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:L6GRKGR4BAXQGAH6O5IKALGZ62","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":"aa74b6c897c38c40371f0ffcc67f6b8fd270cb8e22d08e9f3cef3ee0cadd924a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-26T11:00:52Z","title_canon_sha256":"84ba0c4182ca1dc9344f6b26d5fc200d89cfe656cc2487fb584605578a69bba5"},"schema_version":"1.0","source":{"id":"1502.07502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07502","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07502v1","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07502","created_at":"2026-05-18T02:26:03Z"},{"alias_kind":"pith_short_12","alias_value":"L6GRKGR4BAXQ","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"L6GRKGR4BAXQGAH6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"L6GRKGR4","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:3d4f19ef9b0e73cdefa8d51a8a179fc6fc7828f57a2a466530f9378a12d1eacf","target":"graph","created_at":"2026-05-18T02:26:03Z","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 the largest Swift AGN monitoring program, concerning UV/optical variability in Seyferts. From 554 observations, over a 750d period, of the Seyfert galaxy NGC 5548, we see (McHardy et al. 2014) a good overall correlation between the X-ray and UV/optical bands,particularly on short timescales (tens of days). The UVOT bands are found to lag behind X-rays with a lag scaling as wavelength to the power 1.23 +/- 0.31, in excellent agreement with that expected (1.33) if UV/optical variability arises from reprocessing of X-rays by the accretion disc. However, the observed lags are ~3 times","authors_text":"D. Emmanoulopoulos, D.T. Cameron, E. Breedt, I.M. McHardy, J. Gelbord, P. Arevalo, P. Lira, P. Uttley, S.D. Connolly, T. Dwelly","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-26T11:00:52Z","title":"The largest Swift AGN monitoring campaign: UV/optical variability in NGC 5548"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07502","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:f744ac23c147fdc72032f51ab1f0f64af1e22930daf164877b29df7c4a85276a","target":"record","created_at":"2026-05-18T02:26:03Z","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":"aa74b6c897c38c40371f0ffcc67f6b8fd270cb8e22d08e9f3cef3ee0cadd924a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-26T11:00:52Z","title_canon_sha256":"84ba0c4182ca1dc9344f6b26d5fc200d89cfe656cc2487fb584605578a69bba5"},"schema_version":"1.0","source":{"id":"1502.07502","kind":"arxiv","version":1}},"canonical_sha256":"5f8d151a3c082f0300fe7750a02cd9f691d34ed739fba8a715eb0978e5a2a4d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f8d151a3c082f0300fe7750a02cd9f691d34ed739fba8a715eb0978e5a2a4d4","first_computed_at":"2026-05-18T02:26:03.503530Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:26:03.503530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YC+v3ePOqHXSIWBiJqwlKJdWc/CAJu9GY8OlMcZ9cEM8UKHLiQCFfkJGzYhZUBV+RqKiNAjRlYyejnG6WVdhDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:26:03.504136Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f744ac23c147fdc72032f51ab1f0f64af1e22930daf164877b29df7c4a85276a","sha256:3d4f19ef9b0e73cdefa8d51a8a179fc6fc7828f57a2a466530f9378a12d1eacf"],"state_sha256":"5c6953418bc02c4b248605f9963ecfabf7b7a7029f32acc7f3a5f5f2a3ef3172"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gQ60k0PDWgBVET8/AG3kiZdatxBqv5xCF0dt8I4qOIZaYc7owTEmqU7IGZy2demIcZUC3F2XAJBQRZA9sj9AAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T19:21:43.459879Z","bundle_sha256":"abcb2364a13173e22a7017df2888661a9acc53ddb957b49c167e60bc61e68b7f"}}