{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:O4NXVFZ4AE7BS52P5MCP3G2FUZ","short_pith_number":"pith:O4NXVFZ4","schema_version":"1.0","canonical_sha256":"771b7a973c013e19774feb04fd9b45a659c9ea1424928a4e8615c32fa2a68e87","source":{"kind":"arxiv","id":"1801.06332","version":1},"attestation_state":"computed","paper":{"title":"The Megamaser Cosmology Project. X. High Resolution Maps and Mass Constraint for SMBHs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"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, K. Y. Lo, M. J. Reid, W. Zhao","submitted_at":"2018-01-19T08:51:31Z","abstract_excerpt":"We present high resolution (sub-mas) VLBI maps of nuclear H2O megamasers for seven galaxies. In UGC6093, the well-aligned systemic masers and high-velocity masers originate in an edge-on, flat disk and we determine the mass of the central SMBH to be M_SMBH = 2.58*10^7Msun(+-7%). For J1346+5228, the distribution of masers is consistent with a disk, but the faint high-velocity masers are only marginally detected, and we constrain the mass of the SMBH to be in the range 1.5-2.0*10^7Msun. The origin of the masers in Mrk1210 is less clear, as the systemic and high-velocity masers are misaligned and"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1801.06332","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-19T08:51:31Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"ef0382a261d5212be73d7aa510e2e60e2e071d04a580edd51c394a680af40385","abstract_canon_sha256":"97d8db14cba727cc7369c605ded151cfe09b4b7ab456ed986dd05b0acd742204"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:23.045182Z","signature_b64":"l9AbzikGVHlZd4H9PeFqjLPU8PcMII86PEU7+Jvv+ArTirfcqvHzjFWRSG27+Amjf+fNW3mrSFkKhcfxXQAxBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"771b7a973c013e19774feb04fd9b45a659c9ea1424928a4e8615c32fa2a68e87","last_reissued_at":"2026-05-18T00:22:23.044509Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:23.044509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Megamaser Cosmology Project. X. High Resolution Maps and Mass Constraint for SMBHs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"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, K. Y. Lo, M. J. Reid, W. Zhao","submitted_at":"2018-01-19T08:51:31Z","abstract_excerpt":"We present high resolution (sub-mas) VLBI maps of nuclear H2O megamasers for seven galaxies. In UGC6093, the well-aligned systemic masers and high-velocity masers originate in an edge-on, flat disk and we determine the mass of the central SMBH to be M_SMBH = 2.58*10^7Msun(+-7%). For J1346+5228, the distribution of masers is consistent with a disk, but the faint high-velocity masers are only marginally detected, and we constrain the mass of the SMBH to be in the range 1.5-2.0*10^7Msun. The origin of the masers in Mrk1210 is less clear, as the systemic and high-velocity masers are misaligned and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06332","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1801.06332","created_at":"2026-05-18T00:22:23.044619+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.06332v1","created_at":"2026-05-18T00:22:23.044619+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.06332","created_at":"2026-05-18T00:22:23.044619+00:00"},{"alias_kind":"pith_short_12","alias_value":"O4NXVFZ4AE7B","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_16","alias_value":"O4NXVFZ4AE7BS52P","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_8","alias_value":"O4NXVFZ4","created_at":"2026-05-18T12:32:40.477152+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ","json":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ.json","graph_json":"https://pith.science/api/pith-number/O4NXVFZ4AE7BS52P5MCP3G2FUZ/graph.json","events_json":"https://pith.science/api/pith-number/O4NXVFZ4AE7BS52P5MCP3G2FUZ/events.json","paper":"https://pith.science/paper/O4NXVFZ4"},"agent_actions":{"view_html":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ","download_json":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ.json","view_paper":"https://pith.science/paper/O4NXVFZ4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.06332&json=true","fetch_graph":"https://pith.science/api/pith-number/O4NXVFZ4AE7BS52P5MCP3G2FUZ/graph.json","fetch_events":"https://pith.science/api/pith-number/O4NXVFZ4AE7BS52P5MCP3G2FUZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ/action/storage_attestation","attest_author":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ/action/author_attestation","sign_citation":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ/action/citation_signature","submit_replication":"https://pith.science/pith/O4NXVFZ4AE7BS52P5MCP3G2FUZ/action/replication_record"}},"created_at":"2026-05-18T00:22:23.044619+00:00","updated_at":"2026-05-18T00:22:23.044619+00:00"}