{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:OUNWHU6L6CI56YD2FXHHEPGA7Q","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":"ff8e02528753d2d5c0f19e67ef80c97b64b05b4e90dceccb99402825e8b0354b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-27T02:19:19Z","title_canon_sha256":"ed33ff9c979a8a46cd62703e4d7c103da08b14d794ddee42b716411b95466c6c"},"schema_version":"1.0","source":{"id":"1006.5178","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.5178","created_at":"2026-05-18T04:20:22Z"},{"alias_kind":"arxiv_version","alias_value":"1006.5178v2","created_at":"2026-05-18T04:20:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.5178","created_at":"2026-05-18T04:20:22Z"},{"alias_kind":"pith_short_12","alias_value":"OUNWHU6L6CI5","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OUNWHU6L6CI56YD2","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OUNWHU6L","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:b51a7e782a2d1daab639d7b11da1a720a7bd1aba7c368d1546a20ea2d3ebf0e6","target":"graph","created_at":"2026-05-18T04:20:22Z","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 a compilation of properties of the 105,783 quasars in the SDSS Data Release 7 (DR7) quasar catalog. In this value-added product, we compile continuum and emission line measurements around the Halpha, Hbeta, MgII and CIV regions, as well as other quantities such as radio properties, broad absorption line quasar (BALQSO) flags, and disk emitters. We also compile virial black hole mass estimates based on various calibrations. For the fiducial virial mass estimates we use the Vestergaard & Peterson (VP06) calibrations for Hbeta and CIV, and our own calibration for MgII which matches the","authors_text":"Audrey Simmons, Dan Oravetz, Dmitry Bizyaev, Donald P. Schneider, Elena Malanushenko, Gordon T. Richards, Howard Brewington, Kaike Pan, Michael A. Strauss, Patrick B. Hall, Stephanie Snedden, Viktor Malanushenko, Yue Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-27T02:19:19Z","title":"A Catalog of Quasar Properties from SDSS DR7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.5178","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":"sha256:288283db7c23f586fa5f62a528d64873954cf2ce517515e7f70705c050772d6b","target":"record","created_at":"2026-05-18T04:20:22Z","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":"ff8e02528753d2d5c0f19e67ef80c97b64b05b4e90dceccb99402825e8b0354b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-27T02:19:19Z","title_canon_sha256":"ed33ff9c979a8a46cd62703e4d7c103da08b14d794ddee42b716411b95466c6c"},"schema_version":"1.0","source":{"id":"1006.5178","kind":"arxiv","version":2}},"canonical_sha256":"751b63d3cbf091df607a2dce723cc0fc0daa50ef1113f66b816399ce1d112f35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"751b63d3cbf091df607a2dce723cc0fc0daa50ef1113f66b816399ce1d112f35","first_computed_at":"2026-05-18T04:20:22.281450Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:20:22.281450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2p9DOvzOij/WBy5IPkphabdj0+JrnycDfuxS09OSZW6qDDClf0roA7GBYd33JvYPwirVm030QPHahnl1Rx5jAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:20:22.281961Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.5178","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:288283db7c23f586fa5f62a528d64873954cf2ce517515e7f70705c050772d6b","sha256:b51a7e782a2d1daab639d7b11da1a720a7bd1aba7c368d1546a20ea2d3ebf0e6"],"state_sha256":"89ae5928b2f302be7302359176dbc7595e5a67c0a653130a43bcbc46fd9197ae"}