{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:SCX2BSCE3IWPUEPLC7W7S33XEB","short_pith_number":"pith:SCX2BSCE","canonical_record":{"source":{"id":"1610.06802","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-21T14:27:01Z","cross_cats_sorted":[],"title_canon_sha256":"4dc37aec78bc588a32e528eae8542068b13ea5bd65bafdaf1b180f19e07ab4ae","abstract_canon_sha256":"62b73a9102ff5ca80827b6f2de71361484cc8fc4bdf938fe9911d2c668507460"},"schema_version":"1.0"},"canonical_sha256":"90afa0c844da2cfa11eb17edf96f7720485a608fcf40ab5985b766eb136c1423","source":{"kind":"arxiv","id":"1610.06802","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.06802","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1610.06802v1","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.06802","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"SCX2BSCE3IWP","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SCX2BSCE3IWPUEPL","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SCX2BSCE","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:SCX2BSCE3IWPUEPLC7W7S33XEB","target":"record","payload":{"canonical_record":{"source":{"id":"1610.06802","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-21T14:27:01Z","cross_cats_sorted":[],"title_canon_sha256":"4dc37aec78bc588a32e528eae8542068b13ea5bd65bafdaf1b180f19e07ab4ae","abstract_canon_sha256":"62b73a9102ff5ca80827b6f2de71361484cc8fc4bdf938fe9911d2c668507460"},"schema_version":"1.0"},"canonical_sha256":"90afa0c844da2cfa11eb17edf96f7720485a608fcf40ab5985b766eb136c1423","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:29.848058Z","signature_b64":"nQKRQXxK9pCg4OGZtUq2QCjrVRWlojy2i3fjf+HE3/ULavySrPEm0doO6091EYC3HjlaafRW/v7hTlP/cZg4BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90afa0c844da2cfa11eb17edf96f7720485a608fcf40ab5985b766eb136c1423","last_reissued_at":"2026-05-18T00:53:29.847638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:29.847638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.06802","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":"2026-05-18T00:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tQHWWfAWcA58BX6nxHBPS3c+E/OfUYLJZRSlZWRHJqMgGMO70nG63XWr1NxtimoUt8UGIzX1tyvAs8F/TI/IAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:49:39.110157Z"},"content_sha256":"757f0b5effdd8f2a0d1e7999c7e60cb61974713f73183950b860d9cd333f4bc2","schema_version":"1.0","event_id":"sha256:757f0b5effdd8f2a0d1e7999c7e60cb61974713f73183950b860d9cd333f4bc2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:SCX2BSCE3IWPUEPLC7W7S33XEB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Megamaser Cosmology Project.IX. Black hole masses for three maser galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Henkel, C. M. V. Impellizzeri, C. Y. Kuo, D. W. Pesce, F. Gao, J. A. Braatz, J. E. Greene, J. J. Condon, J. Wagner, K. Y. Lo, M. J. Reid, W. Zhao","submitted_at":"2016-10-21T14:27:01Z","abstract_excerpt":"As part of the Megamaser Cosmology Project (MCP), we present VLBI maps of nuclear water masers toward five galaxies. The masers originate in sub-parsec circumnuclear disks. For three of the galaxies, we fit Keplerian rotation curves to estimate their supermassive black hole (SMBH) masses, and determine (2.9 $\\pm$ 0.3) $\\times~10^{6}M_\\odot$ for J0437+2456, (1.7 $\\pm$ 0.1) $\\times~10^{7}M_\\odot$ for ESO 558$-$G009, and (1.1 $\\pm$ 0.2) $\\times~10^{7}M_\\odot$ for NGC 5495. In the other two galaxies, Mrk 1029 and NGC 1320, the geometry and dynamics are more complicated and preclude robust black ho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.06802","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":"2026-05-18T00:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ffhnaHrL2UmVPwjoBdPSuhR3bLb88NGs/QOJQ7t4V40DmP3pVzjtKEqojVYAwn4ut8gQtNfMP+b2bftvWK83DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:49:39.110992Z"},"content_sha256":"d70357167f36a8951d9c65465e515b253068c3541f13e2a144835f73f1d4552b","schema_version":"1.0","event_id":"sha256:d70357167f36a8951d9c65465e515b253068c3541f13e2a144835f73f1d4552b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/bundle.json","state_url":"https://pith.science/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/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":"2026-05-31T01:49:39Z","links":{"resolver":"https://pith.science/pith/SCX2BSCE3IWPUEPLC7W7S33XEB","bundle":"https://pith.science/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/bundle.json","state":"https://pith.science/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SCX2BSCE3IWPUEPLC7W7S33XEB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:SCX2BSCE3IWPUEPLC7W7S33XEB","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":"62b73a9102ff5ca80827b6f2de71361484cc8fc4bdf938fe9911d2c668507460","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-21T14:27:01Z","title_canon_sha256":"4dc37aec78bc588a32e528eae8542068b13ea5bd65bafdaf1b180f19e07ab4ae"},"schema_version":"1.0","source":{"id":"1610.06802","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.06802","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1610.06802v1","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.06802","created_at":"2026-05-18T00:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"SCX2BSCE3IWP","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SCX2BSCE3IWPUEPL","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SCX2BSCE","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:d70357167f36a8951d9c65465e515b253068c3541f13e2a144835f73f1d4552b","target":"graph","created_at":"2026-05-18T00:53:29Z","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":"As part of the Megamaser Cosmology Project (MCP), we present VLBI maps of nuclear water masers toward five galaxies. The masers originate in sub-parsec circumnuclear disks. For three of the galaxies, we fit Keplerian rotation curves to estimate their supermassive black hole (SMBH) masses, and determine (2.9 $\\pm$ 0.3) $\\times~10^{6}M_\\odot$ for J0437+2456, (1.7 $\\pm$ 0.1) $\\times~10^{7}M_\\odot$ for ESO 558$-$G009, and (1.1 $\\pm$ 0.2) $\\times~10^{7}M_\\odot$ for NGC 5495. In the other two galaxies, Mrk 1029 and NGC 1320, the geometry and dynamics are more complicated and preclude robust black ho","authors_text":"C. Henkel, C. M. V. Impellizzeri, C. Y. Kuo, D. W. Pesce, F. Gao, J. A. Braatz, J. E. Greene, J. J. Condon, J. Wagner, K. Y. Lo, M. J. Reid, W. Zhao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-21T14:27:01Z","title":"The Megamaser Cosmology Project.IX. Black hole masses for three maser galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.06802","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":"sha256:757f0b5effdd8f2a0d1e7999c7e60cb61974713f73183950b860d9cd333f4bc2","target":"record","created_at":"2026-05-18T00:53:29Z","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":"62b73a9102ff5ca80827b6f2de71361484cc8fc4bdf938fe9911d2c668507460","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-21T14:27:01Z","title_canon_sha256":"4dc37aec78bc588a32e528eae8542068b13ea5bd65bafdaf1b180f19e07ab4ae"},"schema_version":"1.0","source":{"id":"1610.06802","kind":"arxiv","version":1}},"canonical_sha256":"90afa0c844da2cfa11eb17edf96f7720485a608fcf40ab5985b766eb136c1423","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"90afa0c844da2cfa11eb17edf96f7720485a608fcf40ab5985b766eb136c1423","first_computed_at":"2026-05-18T00:53:29.847638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:29.847638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nQKRQXxK9pCg4OGZtUq2QCjrVRWlojy2i3fjf+HE3/ULavySrPEm0doO6091EYC3HjlaafRW/v7hTlP/cZg4BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:29.848058Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.06802","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:757f0b5effdd8f2a0d1e7999c7e60cb61974713f73183950b860d9cd333f4bc2","sha256:d70357167f36a8951d9c65465e515b253068c3541f13e2a144835f73f1d4552b"],"state_sha256":"38588de71dd927929c8d2d7945f73d56bae850ea3cee55b1709d8dc478e254ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DVpOwWzodPdwBWwSK3XkP2X4hcavF/UjDHxhHyHb6ku2nB0jleZ7AwhrA4UR/jKI+zSBlFWTLHUoBnq4sbigBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T01:49:39.115276Z","bundle_sha256":"36ae953e397a380975beac7120d2b57a771bed54a51bbc212ba19d3097b6c6f1"}}