{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:NVP6MEKNA4XQFBIEN2DSUPGW7R","short_pith_number":"pith:NVP6MEKN","canonical_record":{"source":{"id":"0808.0507","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-04T20:15:49Z","cross_cats_sorted":[],"title_canon_sha256":"ccdada951fdf4a1704882f18e9ed2f867f45b3e113adb0495683081d3962486f","abstract_canon_sha256":"86127cb4fdf597b5ae826d4ed9341716a12c2ad2bbb9b6aa17c72213ec655e4a"},"schema_version":"1.0"},"canonical_sha256":"6d5fe6114d072f0285046e872a3cd6fc500e44c000d9342bd085f4fa93a16e8d","source":{"kind":"arxiv","id":"0808.0507","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0507","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0507v1","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0507","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"pith_short_12","alias_value":"NVP6MEKNA4XQ","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"NVP6MEKNA4XQFBIE","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"NVP6MEKN","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:NVP6MEKNA4XQFBIEN2DSUPGW7R","target":"record","payload":{"canonical_record":{"source":{"id":"0808.0507","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-04T20:15:49Z","cross_cats_sorted":[],"title_canon_sha256":"ccdada951fdf4a1704882f18e9ed2f867f45b3e113adb0495683081d3962486f","abstract_canon_sha256":"86127cb4fdf597b5ae826d4ed9341716a12c2ad2bbb9b6aa17c72213ec655e4a"},"schema_version":"1.0"},"canonical_sha256":"6d5fe6114d072f0285046e872a3cd6fc500e44c000d9342bd085f4fa93a16e8d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:07:41.008237Z","signature_b64":"ZdHpyKBxKqS1fTPFfmHonQBpLh9WfRdWFlk1Eomcoj6S9++2EshUuv4extHm8afXJFFDgmKb8bzA7xtN6ARHDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d5fe6114d072f0285046e872a3cd6fc500e44c000d9342bd085f4fa93a16e8d","last_reissued_at":"2026-05-18T04:07:41.007763Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:07:41.007763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.0507","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":"2026-05-18T04:07:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U426+BOj9ELgtGgNrpK9+ZUbRLt3nGx8bU9jIAV3z4lJJ50qIXfRTmxFuHgxRt80L/FMFyoFmqSCfGH3qbsMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:41:35.779917Z"},"content_sha256":"d4341dff09942785ed8f3bdec210b3f73e5daaaa10105dac9439f3fd8ceb44e1","schema_version":"1.0","event_id":"sha256:d4341dff09942785ed8f3bdec210b3f73e5daaaa10105dac9439f3fd8ceb44e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:NVP6MEKNA4XQFBIEN2DSUPGW7R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Mass of the Black Hole in the Quasar PG 2130+099","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. M. Peterson, C. J. Grier, D. L. DePoy, D. W. Atlee, J. Bird, J. C. Yee, J. D. Eastman, J. L. Prieto, K. D. Denney, L. C. Watson, M. C. Bentz, M. Dietrich, M. E. Eyler, M. S. Peeples, R. J. Assef, R. Siverd, R. W. Pogge","submitted_at":"2008-08-04T20:15:49Z","abstract_excerpt":"We present the results of a recent reverberation-mapping campaign undertaken to improve measurements of the radius of the broad line region and the central black hole mass of the quasar PG 2130+099. Cross correlation of the 5100 angstrom continuum and H-beta emission-line light curves yields a time lag of 22.9 (+4.4 - 4.3) days, corresponding to a central black hole mass MBH= 3.8 (+/- 1.5) x 10^7 Msun. This value supports the notion that previous measurements yielded an incorrect lag. We re-analyzed previous datasets to investigate the possible sources of the discrepancy and conclude that prev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0507","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":"2026-05-18T04:07:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"da5CJ9j185WO7l7xarjUzYtwp9/XtnaA1w1g2ESYHA2Xd5m32+PMaXkoLaqvCfKkhIhXKjQao4GMf/8L+WZDBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:41:35.780266Z"},"content_sha256":"79303ca2bab999b19e114812403c2a560118e631db89849e74c30c7c3d2099e8","schema_version":"1.0","event_id":"sha256:79303ca2bab999b19e114812403c2a560118e631db89849e74c30c7c3d2099e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/bundle.json","state_url":"https://pith.science/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/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":"2026-05-28T08:41:35Z","links":{"resolver":"https://pith.science/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R","bundle":"https://pith.science/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/bundle.json","state":"https://pith.science/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NVP6MEKNA4XQFBIEN2DSUPGW7R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:NVP6MEKNA4XQFBIEN2DSUPGW7R","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":"86127cb4fdf597b5ae826d4ed9341716a12c2ad2bbb9b6aa17c72213ec655e4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-04T20:15:49Z","title_canon_sha256":"ccdada951fdf4a1704882f18e9ed2f867f45b3e113adb0495683081d3962486f"},"schema_version":"1.0","source":{"id":"0808.0507","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0507","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0507v1","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0507","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"pith_short_12","alias_value":"NVP6MEKNA4XQ","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"NVP6MEKNA4XQFBIE","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"NVP6MEKN","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:79303ca2bab999b19e114812403c2a560118e631db89849e74c30c7c3d2099e8","target":"graph","created_at":"2026-05-18T04:07:41Z","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 results of a recent reverberation-mapping campaign undertaken to improve measurements of the radius of the broad line region and the central black hole mass of the quasar PG 2130+099. Cross correlation of the 5100 angstrom continuum and H-beta emission-line light curves yields a time lag of 22.9 (+4.4 - 4.3) days, corresponding to a central black hole mass MBH= 3.8 (+/- 1.5) x 10^7 Msun. This value supports the notion that previous measurements yielded an incorrect lag. We re-analyzed previous datasets to investigate the possible sources of the discrepancy and conclude that prev","authors_text":"B. M. Peterson, C. J. Grier, D. L. DePoy, D. W. Atlee, J. Bird, J. C. Yee, J. D. Eastman, J. L. Prieto, K. D. Denney, L. C. Watson, M. C. Bentz, M. Dietrich, M. E. Eyler, M. S. Peeples, R. J. Assef, R. Siverd, R. W. Pogge","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-04T20:15:49Z","title":"The Mass of the Black Hole in the Quasar PG 2130+099"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0507","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:d4341dff09942785ed8f3bdec210b3f73e5daaaa10105dac9439f3fd8ceb44e1","target":"record","created_at":"2026-05-18T04:07:41Z","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":"86127cb4fdf597b5ae826d4ed9341716a12c2ad2bbb9b6aa17c72213ec655e4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-04T20:15:49Z","title_canon_sha256":"ccdada951fdf4a1704882f18e9ed2f867f45b3e113adb0495683081d3962486f"},"schema_version":"1.0","source":{"id":"0808.0507","kind":"arxiv","version":1}},"canonical_sha256":"6d5fe6114d072f0285046e872a3cd6fc500e44c000d9342bd085f4fa93a16e8d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d5fe6114d072f0285046e872a3cd6fc500e44c000d9342bd085f4fa93a16e8d","first_computed_at":"2026-05-18T04:07:41.007763Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:41.007763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZdHpyKBxKqS1fTPFfmHonQBpLh9WfRdWFlk1Eomcoj6S9++2EshUuv4extHm8afXJFFDgmKb8bzA7xtN6ARHDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:41.008237Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.0507","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4341dff09942785ed8f3bdec210b3f73e5daaaa10105dac9439f3fd8ceb44e1","sha256:79303ca2bab999b19e114812403c2a560118e631db89849e74c30c7c3d2099e8"],"state_sha256":"483bd103d2777ee37baee2a78c13f4e77653a054c71ee64bbaa8b3490ad6fae4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d1/qIgd8wLqb+6V4GCMoUOQ9ZOQXNMER6psUoktT31ty4PQ3JGH57aqdHyld2aU1T5amb3f7jLhMLyex1dTnBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:41:35.782205Z","bundle_sha256":"89c643213bcab1375f825c0abe071b595f2b2c77a07f1461e63dbaa9a9491b66"}}