{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VYUZUVE5L5T3FU75KQUCVM7OCP","short_pith_number":"pith:VYUZUVE5","canonical_record":{"source":{"id":"1510.07329","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-26T00:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"9b7c0d9701219b475155a03b838f0f1a55ad07aac865467019b352be4ff8b9f0","abstract_canon_sha256":"1348ea972ebcbdc7300da60cf0d656a0edd3a0cb9aa5c01b797328221999d1e7"},"schema_version":"1.0"},"canonical_sha256":"ae299a549d5f67b2d3fd54282ab3ee13d986178148f97c46c50180e6bb6636a7","source":{"kind":"arxiv","id":"1510.07329","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07329","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07329v1","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07329","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"VYUZUVE5L5T3","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VYUZUVE5L5T3FU75","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VYUZUVE5","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VYUZUVE5L5T3FU75KQUCVM7OCP","target":"record","payload":{"canonical_record":{"source":{"id":"1510.07329","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-26T00:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"9b7c0d9701219b475155a03b838f0f1a55ad07aac865467019b352be4ff8b9f0","abstract_canon_sha256":"1348ea972ebcbdc7300da60cf0d656a0edd3a0cb9aa5c01b797328221999d1e7"},"schema_version":"1.0"},"canonical_sha256":"ae299a549d5f67b2d3fd54282ab3ee13d986178148f97c46c50180e6bb6636a7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:22.044169Z","signature_b64":"iJ4JP+iwcVHrBypKNF8sQlm+gILXr/NP3RUE455kHGP7R+9WmdtS/h8xjovzRGf/orz5Y0GHcsDfsxmuj+elDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae299a549d5f67b2d3fd54282ab3ee13d986178148f97c46c50180e6bb6636a7","last_reissued_at":"2026-05-18T01:27:22.043706Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:22.043706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.07329","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":"2026-05-18T01:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KuvYcuGaw45C24toAujoFsZ/riDVrekUIxqCLC1EZCLIlZlKkoldSAFbsPrXAJRiJqhEXMAV8QO20AtBNaEUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:53:35.852114Z"},"content_sha256":"88c4cd9560d5f34ab6da7f2373acb4f9b4b9cdf2c6f1d47943c27342efd6f1cb","schema_version":"1.0","event_id":"sha256:88c4cd9560d5f34ab6da7f2373acb4f9b4b9cdf2c6f1d47943c27342efd6f1cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VYUZUVE5L5T3FU75KQUCVM7OCP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Robotic Reverberation Mapping of Arp 151","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2), (2) Department of Physics, A. J. Barth, A. Pancoast, C. Villforth, D.J. Sand, E. Romero-Colmenero, H. Winkler ((1) Las Cumbres Observatory Global Telescope Network, K. Horne, L. Pei, L. Raganit, Santa Barbara), S. Crawford, S. Valenti (1, T. Boroson, T. Treu, University of California","submitted_at":"2015-10-26T00:05:41Z","abstract_excerpt":"We present the first results from the Las Cumbres Observatory Global Telescope (LCOGT) Network's Active Galactic Nuclei Key Project, a large program devoted to using the robotic resources of LCOGT to perform time domain studies of active galaxies. We monitored the Seyfert 1 galaxy Arp~151 (Mrk~40) for $\\sim$200 days with robotic imagers and with the FLOYDS robotic spectrograph at Faulkes Telescope North. Arp~151 was highly variable during this campaign, with $V$-band light curve variations of $\\sim$0.3 mag and H$\\beta$ flux changing by a factor of $\\sim$3. We measure robust time lags between t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07329","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":"2026-05-18T01:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GOhARNiPN8xb2PeW1vPCtmNoL9PgwsWIM03mThUEY/Lt7ImjgqmK4qncDQddPGcSLDRDRIWUv+lq5oFyw9eNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:53:35.852478Z"},"content_sha256":"6da1f1f2d276f391df1df30105465e03ad359635048466a85da438b97f4052a2","schema_version":"1.0","event_id":"sha256:6da1f1f2d276f391df1df30105465e03ad359635048466a85da438b97f4052a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/bundle.json","state_url":"https://pith.science/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/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":"2026-05-28T04:53:35Z","links":{"resolver":"https://pith.science/pith/VYUZUVE5L5T3FU75KQUCVM7OCP","bundle":"https://pith.science/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/bundle.json","state":"https://pith.science/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VYUZUVE5L5T3FU75KQUCVM7OCP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VYUZUVE5L5T3FU75KQUCVM7OCP","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":"1348ea972ebcbdc7300da60cf0d656a0edd3a0cb9aa5c01b797328221999d1e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-26T00:05:41Z","title_canon_sha256":"9b7c0d9701219b475155a03b838f0f1a55ad07aac865467019b352be4ff8b9f0"},"schema_version":"1.0","source":{"id":"1510.07329","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07329","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07329v1","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07329","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"VYUZUVE5L5T3","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VYUZUVE5L5T3FU75","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VYUZUVE5","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:6da1f1f2d276f391df1df30105465e03ad359635048466a85da438b97f4052a2","target":"graph","created_at":"2026-05-18T01:27:22Z","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 present the first results from the Las Cumbres Observatory Global Telescope (LCOGT) Network's Active Galactic Nuclei Key Project, a large program devoted to using the robotic resources of LCOGT to perform time domain studies of active galaxies. We monitored the Seyfert 1 galaxy Arp~151 (Mrk~40) for $\\sim$200 days with robotic imagers and with the FLOYDS robotic spectrograph at Faulkes Telescope North. Arp~151 was highly variable during this campaign, with $V$-band light curve variations of $\\sim$0.3 mag and H$\\beta$ flux changing by a factor of $\\sim$3. We measure robust time lags between t","authors_text":"2), (2) Department of Physics, A. J. Barth, A. Pancoast, C. Villforth, D.J. Sand, E. Romero-Colmenero, H. Winkler ((1) Las Cumbres Observatory Global Telescope Network, K. Horne, L. Pei, L. Raganit, Santa Barbara), S. Crawford, S. Valenti (1, T. Boroson, T. Treu, University of California","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-26T00:05:41Z","title":"Robotic Reverberation Mapping of Arp 151"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07329","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":"sha256:88c4cd9560d5f34ab6da7f2373acb4f9b4b9cdf2c6f1d47943c27342efd6f1cb","target":"record","created_at":"2026-05-18T01:27:22Z","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":"1348ea972ebcbdc7300da60cf0d656a0edd3a0cb9aa5c01b797328221999d1e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-26T00:05:41Z","title_canon_sha256":"9b7c0d9701219b475155a03b838f0f1a55ad07aac865467019b352be4ff8b9f0"},"schema_version":"1.0","source":{"id":"1510.07329","kind":"arxiv","version":1}},"canonical_sha256":"ae299a549d5f67b2d3fd54282ab3ee13d986178148f97c46c50180e6bb6636a7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae299a549d5f67b2d3fd54282ab3ee13d986178148f97c46c50180e6bb6636a7","first_computed_at":"2026-05-18T01:27:22.043706Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:22.043706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iJ4JP+iwcVHrBypKNF8sQlm+gILXr/NP3RUE455kHGP7R+9WmdtS/h8xjovzRGf/orz5Y0GHcsDfsxmuj+elDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:22.044169Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07329","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88c4cd9560d5f34ab6da7f2373acb4f9b4b9cdf2c6f1d47943c27342efd6f1cb","sha256:6da1f1f2d276f391df1df30105465e03ad359635048466a85da438b97f4052a2"],"state_sha256":"0659ef5c83088e5e7dbbb97a52833ce99fe0f70d8dd4a1b1ca6904fa96389709"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Af0PqFpy3dxuNgottGefCS4b7iYxQbFOK2etWCGO9E52La+ctniMiJb9cW52S8bLzWxlLTw6YA1HYaMAeazACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:53:35.854424Z","bundle_sha256":"a276103d6a1f72d027d475aeabae5c23528a4c9e631dba6536df865e4a03af71"}}