{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:LXXDXIVDIXUY75AI6T25LJX2NN","short_pith_number":"pith:LXXDXIVD","canonical_record":{"source":{"id":"2007.07888","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-15T17:28:58Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ec4b29d0e0393838796a185a7023915fbc0caeb13530f7b6b239b431a83494f1","abstract_canon_sha256":"2d1676dd7ea6de4fba802d4dfd7f7ca97d2232a2463c9d256c724708628d9b6a"},"schema_version":"1.0"},"canonical_sha256":"5dee3ba2a345e98ff408f4f5d5a6fa6b4b7c5825c0717c564c6259fbe5eaf73b","source":{"kind":"arxiv","id":"2007.07888","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.07888","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"arxiv_version","alias_value":"2007.07888v2","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.07888","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_12","alias_value":"LXXDXIVDIXUY","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_16","alias_value":"LXXDXIVDIXUY75AI","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_8","alias_value":"LXXDXIVD","created_at":"2026-07-05T01:42:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:LXXDXIVDIXUY75AI6T25LJX2NN","target":"record","payload":{"canonical_record":{"source":{"id":"2007.07888","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-15T17:28:58Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ec4b29d0e0393838796a185a7023915fbc0caeb13530f7b6b239b431a83494f1","abstract_canon_sha256":"2d1676dd7ea6de4fba802d4dfd7f7ca97d2232a2463c9d256c724708628d9b6a"},"schema_version":"1.0"},"canonical_sha256":"5dee3ba2a345e98ff408f4f5d5a6fa6b4b7c5825c0717c564c6259fbe5eaf73b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:42:39.927036Z","signature_b64":"OzpWJmY1YKQdTw1moqF1E94GwGexVImmc4PD1z16rsSREpg/RIO4uVWzC651Z1NcocJw2GD1ExnfUHCobR8fAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5dee3ba2a345e98ff408f4f5d5a6fa6b4b7c5825c0717c564c6259fbe5eaf73b","last_reissued_at":"2026-07-05T01:42:39.926558Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:42:39.926558Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.07888","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:42:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B+drXOZqfRTiFf0SE8igE7qQlA/dS0dgRGIFYX34A+G/HD5YJmoloEElQo388fXAqSQLNZO68xSy+yMHdeyJCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:17:46.435169Z"},"content_sha256":"97e7f54b01c005a1994033c418b23026e6bf5ed063d60ed27c6c73ea738c8b94","schema_version":"1.0","event_id":"sha256:97e7f54b01c005a1994033c418b23026e6bf5ed063d60ed27c6c73ea738c8b94"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:LXXDXIVDIXUY75AI6T25LJX2NN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Cepheid Distance to the Seyfert 1 Galaxy NGC 4151","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Adam G. Riess, Bradley M. Peterson, Catherine J. Grier, Christopher A. Onken, Elena Dalla Bont\\`a, Erin K. S. Hicks, Gisella De Rosa, Jonathan S. Brown, Laura Ferrarese, Lucas M. Macri, Marianne Vestergaard, Michael M. Fausnaugh, Misty C. Bentz, Richard I. Davies, Richard W. Pogge, Samantha L. Hoffmann, Thaisa Storchi-Bergmann, Wenlong Yuan","submitted_at":"2020-07-15T17:28:58Z","abstract_excerpt":"We derive a distance of $15.8\\pm0.4$ Mpc to the archetypical Seyfert 1 galaxy NGC 4151 based on the near-infrared Cepheid Period-Luminosity relation and new Hubble Space Telescope multiband imaging. This distance determination, based on measurements of 35 long-period ($P > 25$d) Cepheids, will support the absolute calibration of the supermassive black hole mass in this system, as well as studies of the dynamics of the feedback or feeding of its active galactic nucleus."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.07888","kind":"arxiv","version":2},"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/2007.07888/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:42:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aAxTOXTx4DzrbMGSCzIgew1EsN86a5KaVEEvp/L8VQNgQ/X0vzDKE4UBCm35u84Fto1y7TRQ4dkoNcqol8IrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:17:46.435696Z"},"content_sha256":"924877cdae887c4ca8f43c0b3f534007e247d4d8954f6a11f052987e44469376","schema_version":"1.0","event_id":"sha256:924877cdae887c4ca8f43c0b3f534007e247d4d8954f6a11f052987e44469376"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LXXDXIVDIXUY75AI6T25LJX2NN/bundle.json","state_url":"https://pith.science/pith/LXXDXIVDIXUY75AI6T25LJX2NN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LXXDXIVDIXUY75AI6T25LJX2NN/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":"2026-08-05T02:17:46Z","links":{"resolver":"https://pith.science/pith/LXXDXIVDIXUY75AI6T25LJX2NN","bundle":"https://pith.science/pith/LXXDXIVDIXUY75AI6T25LJX2NN/bundle.json","state":"https://pith.science/pith/LXXDXIVDIXUY75AI6T25LJX2NN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LXXDXIVDIXUY75AI6T25LJX2NN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:LXXDXIVDIXUY75AI6T25LJX2NN","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":"2d1676dd7ea6de4fba802d4dfd7f7ca97d2232a2463c9d256c724708628d9b6a","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-15T17:28:58Z","title_canon_sha256":"ec4b29d0e0393838796a185a7023915fbc0caeb13530f7b6b239b431a83494f1"},"schema_version":"1.0","source":{"id":"2007.07888","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.07888","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"arxiv_version","alias_value":"2007.07888v2","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.07888","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_12","alias_value":"LXXDXIVDIXUY","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_16","alias_value":"LXXDXIVDIXUY75AI","created_at":"2026-07-05T01:42:39Z"},{"alias_kind":"pith_short_8","alias_value":"LXXDXIVD","created_at":"2026-07-05T01:42:39Z"}],"graph_snapshots":[{"event_id":"sha256:924877cdae887c4ca8f43c0b3f534007e247d4d8954f6a11f052987e44469376","target":"graph","created_at":"2026-07-05T01:42:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.07888/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive a distance of $15.8\\pm0.4$ Mpc to the archetypical Seyfert 1 galaxy NGC 4151 based on the near-infrared Cepheid Period-Luminosity relation and new Hubble Space Telescope multiband imaging. This distance determination, based on measurements of 35 long-period ($P > 25$d) Cepheids, will support the absolute calibration of the supermassive black hole mass in this system, as well as studies of the dynamics of the feedback or feeding of its active galactic nucleus.","authors_text":"Adam G. Riess, Bradley M. Peterson, Catherine J. Grier, Christopher A. Onken, Elena Dalla Bont\\`a, Erin K. S. Hicks, Gisella De Rosa, Jonathan S. Brown, Laura Ferrarese, Lucas M. Macri, Marianne Vestergaard, Michael M. Fausnaugh, Misty C. Bentz, Richard I. Davies, Richard W. Pogge, Samantha L. Hoffmann, Thaisa Storchi-Bergmann, Wenlong Yuan","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-15T17:28:58Z","title":"The Cepheid Distance to the Seyfert 1 Galaxy NGC 4151"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.07888","kind":"arxiv","version":2},"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":"sha256:97e7f54b01c005a1994033c418b23026e6bf5ed063d60ed27c6c73ea738c8b94","target":"record","created_at":"2026-07-05T01:42:39Z","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":"2d1676dd7ea6de4fba802d4dfd7f7ca97d2232a2463c9d256c724708628d9b6a","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-15T17:28:58Z","title_canon_sha256":"ec4b29d0e0393838796a185a7023915fbc0caeb13530f7b6b239b431a83494f1"},"schema_version":"1.0","source":{"id":"2007.07888","kind":"arxiv","version":2}},"canonical_sha256":"5dee3ba2a345e98ff408f4f5d5a6fa6b4b7c5825c0717c564c6259fbe5eaf73b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5dee3ba2a345e98ff408f4f5d5a6fa6b4b7c5825c0717c564c6259fbe5eaf73b","first_computed_at":"2026-07-05T01:42:39.926558Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:42:39.926558Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OzpWJmY1YKQdTw1moqF1E94GwGexVImmc4PD1z16rsSREpg/RIO4uVWzC651Z1NcocJw2GD1ExnfUHCobR8fAw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:42:39.927036Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.07888","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97e7f54b01c005a1994033c418b23026e6bf5ed063d60ed27c6c73ea738c8b94","sha256:924877cdae887c4ca8f43c0b3f534007e247d4d8954f6a11f052987e44469376"],"state_sha256":"69d3dcb67b104c790cce3f02042716481800843467cb0589941f4bee229afd77"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VmMYjpPOb5CBi67ePyrMrxy/BMlpklEHzLfNXP7M7W4IcEgjRgrnnlDR32Tt6IYnhLZenYGhuMytAWdCvJFpBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T02:17:46.443620Z","bundle_sha256":"c18e4e296b19783c8d6e273d68e5ed238d7dc57fbd571609253c1288fe2808d4"}}