{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:Q54Z3VLZUXA5NP2EUXINQH2K5H","short_pith_number":"pith:Q54Z3VLZ","canonical_record":{"source":{"id":"1908.03230","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-08T18:16:26Z","cross_cats_sorted":[],"title_canon_sha256":"70fd39d7731fbf3c19807b092a238e70f463927d01576f4b9690ded8766f8b65","abstract_canon_sha256":"9acfb8f733ae8b88c96c1572bee48b3a1ea61b510a48aec9ef4e0c57f05c2c68"},"schema_version":"1.0"},"canonical_sha256":"87799dd579a5c1d6bf44a5d0d81f4ae9f0d322bb801ad9fa499f7efea7019d06","source":{"kind":"arxiv","id":"1908.03230","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03230","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03230v1","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03230","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"Q54Z3VLZUXA5","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_16","alias_value":"Q54Z3VLZUXA5NP2E","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_8","alias_value":"Q54Z3VLZ","created_at":"2026-07-04T23:58:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:Q54Z3VLZUXA5NP2EUXINQH2K5H","target":"record","payload":{"canonical_record":{"source":{"id":"1908.03230","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-08T18:16:26Z","cross_cats_sorted":[],"title_canon_sha256":"70fd39d7731fbf3c19807b092a238e70f463927d01576f4b9690ded8766f8b65","abstract_canon_sha256":"9acfb8f733ae8b88c96c1572bee48b3a1ea61b510a48aec9ef4e0c57f05c2c68"},"schema_version":"1.0"},"canonical_sha256":"87799dd579a5c1d6bf44a5d0d81f4ae9f0d322bb801ad9fa499f7efea7019d06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:28.827803Z","signature_b64":"AH4ftFygJkYEqbLVt93DY4y+VV5CkKIabZUy4ghYjRI2EGOUx0uQyzRvDnzpN1XoQ06oRTUnCa2bgPBZRXOZBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87799dd579a5c1d6bf44a5d0d81f4ae9f0d322bb801ad9fa499f7efea7019d06","last_reissued_at":"2026-07-04T23:58:28.827378Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:28.827378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.03230","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":"2026-07-04T23:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xn7txfRUBgvaAAGzjQtdba099TYHqaf4wZvR3ZAw9NDEFqV7SaTLL8t+uMcXsJ4XEUvLC+OK5pFgwf5DMKf1Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T05:26:30.388880Z"},"content_sha256":"dc613bd5bad3634fcc6155b9fc1ae100285d4c76d0e24efd141155472b709948","schema_version":"1.0","event_id":"sha256:dc613bd5bad3634fcc6155b9fc1ae100285d4c76d0e24efd141155472b709948"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:Q54Z3VLZUXA5NP2EUXINQH2K5H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modelling the AGN broad line region using single-epoch spectra I. The test case of Arp 151","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. J. Barth, A. Pancoast, M. R. Goad, M. Vestergaard, S. I. Raimundo","submitted_at":"2019-08-08T18:16:26Z","abstract_excerpt":"We show that individual (single-epoch) spectra of AGN can constrain some of the geometry and dynamics of the AGN broad line region. Studies of the cosmic influence of supermassive black holes are limited by the current large uncertainties in the determination of black hole masses. One dominant limitation is the unknown geometry, dynamics and line-of-sight inclination of the broad line region, used to probe the central black hole mass. Recent progress has been made to constrain the spatial and kinematic structure of the broad line region using dynamical modelling of AGN monitoring data and an u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03230","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/1908.03230/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":"2026-07-04T23:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c5dOtudonKZyqWhEzrY7/+uYLr4uytnoiiX/1kdeLVIOUxga39ZaFtds4JOuoCCeLVYQlCvOXqOe7lSmTY9xCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T05:26:30.390474Z"},"content_sha256":"a5870aa4c2c8a5192a796f045c1264587f67abaaad8af88ee9a7f7729f55bcc5","schema_version":"1.0","event_id":"sha256:a5870aa4c2c8a5192a796f045c1264587f67abaaad8af88ee9a7f7729f55bcc5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/bundle.json","state_url":"https://pith.science/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/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":"2026-08-16T05:26:30Z","links":{"resolver":"https://pith.science/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H","bundle":"https://pith.science/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/bundle.json","state":"https://pith.science/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q54Z3VLZUXA5NP2EUXINQH2K5H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Q54Z3VLZUXA5NP2EUXINQH2K5H","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":"9acfb8f733ae8b88c96c1572bee48b3a1ea61b510a48aec9ef4e0c57f05c2c68","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-08T18:16:26Z","title_canon_sha256":"70fd39d7731fbf3c19807b092a238e70f463927d01576f4b9690ded8766f8b65"},"schema_version":"1.0","source":{"id":"1908.03230","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03230","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03230v1","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03230","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"Q54Z3VLZUXA5","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_16","alias_value":"Q54Z3VLZUXA5NP2E","created_at":"2026-07-04T23:58:28Z"},{"alias_kind":"pith_short_8","alias_value":"Q54Z3VLZ","created_at":"2026-07-04T23:58:28Z"}],"graph_snapshots":[{"event_id":"sha256:a5870aa4c2c8a5192a796f045c1264587f67abaaad8af88ee9a7f7729f55bcc5","target":"graph","created_at":"2026-07-04T23:58:28Z","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/1908.03230/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that individual (single-epoch) spectra of AGN can constrain some of the geometry and dynamics of the AGN broad line region. Studies of the cosmic influence of supermassive black holes are limited by the current large uncertainties in the determination of black hole masses. One dominant limitation is the unknown geometry, dynamics and line-of-sight inclination of the broad line region, used to probe the central black hole mass. Recent progress has been made to constrain the spatial and kinematic structure of the broad line region using dynamical modelling of AGN monitoring data and an u","authors_text":"A. J. Barth, A. Pancoast, M. R. Goad, M. Vestergaard, S. I. Raimundo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-08T18:16:26Z","title":"Modelling the AGN broad line region using single-epoch spectra I. The test case of Arp 151"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03230","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:dc613bd5bad3634fcc6155b9fc1ae100285d4c76d0e24efd141155472b709948","target":"record","created_at":"2026-07-04T23:58:28Z","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":"9acfb8f733ae8b88c96c1572bee48b3a1ea61b510a48aec9ef4e0c57f05c2c68","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-08T18:16:26Z","title_canon_sha256":"70fd39d7731fbf3c19807b092a238e70f463927d01576f4b9690ded8766f8b65"},"schema_version":"1.0","source":{"id":"1908.03230","kind":"arxiv","version":1}},"canonical_sha256":"87799dd579a5c1d6bf44a5d0d81f4ae9f0d322bb801ad9fa499f7efea7019d06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87799dd579a5c1d6bf44a5d0d81f4ae9f0d322bb801ad9fa499f7efea7019d06","first_computed_at":"2026-07-04T23:58:28.827378Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:28.827378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AH4ftFygJkYEqbLVt93DY4y+VV5CkKIabZUy4ghYjRI2EGOUx0uQyzRvDnzpN1XoQ06oRTUnCa2bgPBZRXOZBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:28.827803Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.03230","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc613bd5bad3634fcc6155b9fc1ae100285d4c76d0e24efd141155472b709948","sha256:a5870aa4c2c8a5192a796f045c1264587f67abaaad8af88ee9a7f7729f55bcc5"],"state_sha256":"9bd87b9b1f3d0b8d1a2a48305993a64554b376c19ec95aeec50c847f0cad4a6a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d2E5XWh47gtXYxcYOLibBnLGxsDm9aSth5lthm7YmjpK4UXNnUsakyouFv0/q6YnBSoUOcaOpwIAMBTj7SZjDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T05:26:30.470825Z","bundle_sha256":"37aa4ade15b74508c91d2cf65d8406931c32b932d470ad4da217a5e6a83a55c4"}}