{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:XTV6HZVGDQ4TVP7ATQD374XJT4","short_pith_number":"pith:XTV6HZVG","schema_version":"1.0","canonical_sha256":"bcebe3e6a61c393abfe09c07bff2e99f2796e04e0695768b804b73d0ffbfa5f8","source":{"kind":"arxiv","id":"1106.1430","version":3},"attestation_state":"computed","paper":{"title":"Galactic H2CO Densitometry I: Pilot survey of Ultracompact HII regions and methodology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Ginsburg, Ben Zeiger, Cara Battersby, Jeremy Darling, John Bally","submitted_at":"2011-06-07T20:00:01Z","abstract_excerpt":"We present a pilot survey of 21 lines of sight towards UCHII regions in the H2CO 1-1 (6cm) and 2-2 (2cm) transitions, using the H2CO centimeter lines as a molecular gas densitometer. Using Arecibo and Green Bank beam-matched observations, we measure the density of 51 detected H2CO line pairs and present upper limits on density for an additional 24 detected 1-1 lines. We analyze the systematic uncertainties in the H2CO densitometer, achieving H2 density measurements with accuracies ~ 0.1-0.3 dex. The densities measured are not correlated with distance, implying that it is possible to make accur"},"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":"1106.1430","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-07T20:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"94e6dc6668ef120971ec478ed8f75b6dd433fd580ba8a4b1eb4d63ad1ebce1f6","abstract_canon_sha256":"0d3a442f0dbf86dd9d66c2d6dcc66b2381d7a8f5f04c6f06081306a314fa9bf0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:16:53.275161Z","signature_b64":"dsUdaIPXaX+BT9pcsyhHxRAZpClT8llYEBSXt5T40aWsf1oEFIHhtwAiUhW952SzmCHez2qmmbNsGDLTPE50Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bcebe3e6a61c393abfe09c07bff2e99f2796e04e0695768b804b73d0ffbfa5f8","last_reissued_at":"2026-05-18T04:16:53.274599Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:16:53.274599Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Galactic H2CO Densitometry I: Pilot survey of Ultracompact HII regions and methodology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Ginsburg, Ben Zeiger, Cara Battersby, Jeremy Darling, John Bally","submitted_at":"2011-06-07T20:00:01Z","abstract_excerpt":"We present a pilot survey of 21 lines of sight towards UCHII regions in the H2CO 1-1 (6cm) and 2-2 (2cm) transitions, using the H2CO centimeter lines as a molecular gas densitometer. Using Arecibo and Green Bank beam-matched observations, we measure the density of 51 detected H2CO line pairs and present upper limits on density for an additional 24 detected 1-1 lines. We analyze the systematic uncertainties in the H2CO densitometer, achieving H2 density measurements with accuracies ~ 0.1-0.3 dex. The densities measured are not correlated with distance, implying that it is possible to make accur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1430","kind":"arxiv","version":3},"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":"1106.1430","created_at":"2026-05-18T04:16:53.274701+00:00"},{"alias_kind":"arxiv_version","alias_value":"1106.1430v3","created_at":"2026-05-18T04:16:53.274701+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1430","created_at":"2026-05-18T04:16:53.274701+00:00"},{"alias_kind":"pith_short_12","alias_value":"XTV6HZVGDQ4T","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_16","alias_value":"XTV6HZVGDQ4TVP7A","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_8","alias_value":"XTV6HZVG","created_at":"2026-05-18T12:26:47.523578+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/XTV6HZVGDQ4TVP7ATQD374XJT4","json":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4.json","graph_json":"https://pith.science/api/pith-number/XTV6HZVGDQ4TVP7ATQD374XJT4/graph.json","events_json":"https://pith.science/api/pith-number/XTV6HZVGDQ4TVP7ATQD374XJT4/events.json","paper":"https://pith.science/paper/XTV6HZVG"},"agent_actions":{"view_html":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4","download_json":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4.json","view_paper":"https://pith.science/paper/XTV6HZVG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1106.1430&json=true","fetch_graph":"https://pith.science/api/pith-number/XTV6HZVGDQ4TVP7ATQD374XJT4/graph.json","fetch_events":"https://pith.science/api/pith-number/XTV6HZVGDQ4TVP7ATQD374XJT4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4/action/storage_attestation","attest_author":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4/action/author_attestation","sign_citation":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4/action/citation_signature","submit_replication":"https://pith.science/pith/XTV6HZVGDQ4TVP7ATQD374XJT4/action/replication_record"}},"created_at":"2026-05-18T04:16:53.274701+00:00","updated_at":"2026-05-18T04:16:53.274701+00:00"}