{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:QENUM3LUJ4FJJGUFPWOV4SMKG5","short_pith_number":"pith:QENUM3LU","schema_version":"1.0","canonical_sha256":"811b466d744f0a949a857d9d5e498a374ccaac4f85dcabaf16b1c5efe1c3ed7b","source":{"kind":"arxiv","id":"1504.02142","version":1},"attestation_state":"computed","paper":{"title":"ALMA observations of 99 GHz free-free and H40$\\alpha$ line emission from star formation in the centre of NGC 253","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Dickinson, G. A. Fuller, G. J. Bendo, M. J. D'Cruze, R. J. Beswick, T. W. B. Muxlow","submitted_at":"2015-04-08T22:03:00Z","abstract_excerpt":"We present Atacama Large Millimeter/submillimeter Array observations of 99.02 GHz free-free and H40$\\alpha$ emission from the centre of the nearby starburst galaxy NGC 253. We calculate electron temperatures of 3700-4500 K for the photoionized gas, which agrees with previous measurements. We measure a photoionizing photon production rate of $(3.2\\pm0.2)\\times10^{53}$ s$^{-1}$ and a star formation rate of $1.73\\pm0.12$ M$_\\odot$ yr$^{-1}$ within the central 20$\\times$10 arcsec, which fall within the broad range of measurements from previous millimetre and radio observations but which are better"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1504.02142","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-04-08T22:03:00Z","cross_cats_sorted":[],"title_canon_sha256":"35bc95da765a3f6dc309b503711ca3901f0b670e67020550214f4771d3dbb6df","abstract_canon_sha256":"1dab25969f1345e5169e223b678cd322ec6720d83c5b5b2c5c4991563fe0fd16"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:01.138044Z","signature_b64":"mSas46lx+4x0V76Oz39kBul3acfDVmcWcsTnA6cd2tXq8+bgOVeUzG2PokR70yIegr28108MKFj7LBhbpag3BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"811b466d744f0a949a857d9d5e498a374ccaac4f85dcabaf16b1c5efe1c3ed7b","last_reissued_at":"2026-05-18T02:04:01.137336Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:01.137336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"ALMA observations of 99 GHz free-free and H40$\\alpha$ line emission from star formation in the centre of NGC 253","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Dickinson, G. A. Fuller, G. J. Bendo, M. J. D'Cruze, R. J. Beswick, T. W. B. Muxlow","submitted_at":"2015-04-08T22:03:00Z","abstract_excerpt":"We present Atacama Large Millimeter/submillimeter Array observations of 99.02 GHz free-free and H40$\\alpha$ emission from the centre of the nearby starburst galaxy NGC 253. We calculate electron temperatures of 3700-4500 K for the photoionized gas, which agrees with previous measurements. We measure a photoionizing photon production rate of $(3.2\\pm0.2)\\times10^{53}$ s$^{-1}$ and a star formation rate of $1.73\\pm0.12$ M$_\\odot$ yr$^{-1}$ within the central 20$\\times$10 arcsec, which fall within the broad range of measurements from previous millimetre and radio observations but which are better"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02142","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":"1504.02142","created_at":"2026-05-18T02:04:01.137442+00:00"},{"alias_kind":"arxiv_version","alias_value":"1504.02142v1","created_at":"2026-05-18T02:04:01.137442+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02142","created_at":"2026-05-18T02:04:01.137442+00:00"},{"alias_kind":"pith_short_12","alias_value":"QENUM3LUJ4FJ","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_16","alias_value":"QENUM3LUJ4FJJGUF","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_8","alias_value":"QENUM3LU","created_at":"2026-05-18T12:29:37.295048+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/QENUM3LUJ4FJJGUFPWOV4SMKG5","json":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5.json","graph_json":"https://pith.science/api/pith-number/QENUM3LUJ4FJJGUFPWOV4SMKG5/graph.json","events_json":"https://pith.science/api/pith-number/QENUM3LUJ4FJJGUFPWOV4SMKG5/events.json","paper":"https://pith.science/paper/QENUM3LU"},"agent_actions":{"view_html":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5","download_json":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5.json","view_paper":"https://pith.science/paper/QENUM3LU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1504.02142&json=true","fetch_graph":"https://pith.science/api/pith-number/QENUM3LUJ4FJJGUFPWOV4SMKG5/graph.json","fetch_events":"https://pith.science/api/pith-number/QENUM3LUJ4FJJGUFPWOV4SMKG5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5/action/storage_attestation","attest_author":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5/action/author_attestation","sign_citation":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5/action/citation_signature","submit_replication":"https://pith.science/pith/QENUM3LUJ4FJJGUFPWOV4SMKG5/action/replication_record"}},"created_at":"2026-05-18T02:04:01.137442+00:00","updated_at":"2026-05-18T02:04:01.137442+00:00"}