{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:HZCW4ZQ6VEYONB2TY6KPUREEYF","short_pith_number":"pith:HZCW4ZQ6","schema_version":"1.0","canonical_sha256":"3e456e661ea930e68753c794fa4484c173508e053dfa3a496f99ebf2d35035fb","source":{"kind":"arxiv","id":"1705.09672","version":1},"attestation_state":"computed","paper":{"title":"SOFIA/GREAT Discovery of Terahertz Water Masers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alexandre Faure (Grenoble), Alex Kraus (MPIfR), David A. Neufeld (JHU), Gary J. Melnick (CfA), Helmut Wiesemeyer (MPIFR), Karl M. Menten (MPIfR), Michael J. Kaufman (SJSU), Oliver Ricken (MPIfR), Rolf G\\\"usten (MPIfR)","submitted_at":"2017-05-26T18:06:24Z","abstract_excerpt":"We report the discovery of water maser emission at frequencies above 1 THz. Using the GREAT instrument on SOFIA, we have detected emission in the 1.296411 THz 8(27)-7(34) transition of water toward three oxygen-rich evolved stars: W Hya, U Her, and VY CMa. An upper limit on the 1.296 THz line flux was obtained toward R Aql. Near-simultaneous observations of the 22.23508 GHz 6(16)-5(23) water maser transition were carried out towards all four sources using the Effelsberg 100m telescope. The measured line fluxes imply 22 GHz / 1.296 THz photon luminosity ratios of 0.012, 0.12, and 0.83 respectiv"},"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":"1705.09672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-05-26T18:06:24Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a62ac2b0f601366f8778b0b3cb1a726ae3cc3a13f72a5a053dd0c1bb89b378da","abstract_canon_sha256":"f5a7b9ec86f6857705939ce74fc20fb413d8c3694a47742b34330427f0a32ce9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:34.635360Z","signature_b64":"zFfnTYyJlFhfZhVEu9XedaVaHiCttrKJQ1moHZHRCU8qntMDPWKgCJIeolQkaTcnW+6J9gmzciWGC4KIPzX2Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e456e661ea930e68753c794fa4484c173508e053dfa3a496f99ebf2d35035fb","last_reissued_at":"2026-05-18T00:39:34.634633Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:34.634633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"SOFIA/GREAT Discovery of Terahertz Water Masers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alexandre Faure (Grenoble), Alex Kraus (MPIfR), David A. Neufeld (JHU), Gary J. Melnick (CfA), Helmut Wiesemeyer (MPIFR), Karl M. Menten (MPIfR), Michael J. Kaufman (SJSU), Oliver Ricken (MPIfR), Rolf G\\\"usten (MPIfR)","submitted_at":"2017-05-26T18:06:24Z","abstract_excerpt":"We report the discovery of water maser emission at frequencies above 1 THz. Using the GREAT instrument on SOFIA, we have detected emission in the 1.296411 THz 8(27)-7(34) transition of water toward three oxygen-rich evolved stars: W Hya, U Her, and VY CMa. An upper limit on the 1.296 THz line flux was obtained toward R Aql. Near-simultaneous observations of the 22.23508 GHz 6(16)-5(23) water maser transition were carried out towards all four sources using the Effelsberg 100m telescope. The measured line fluxes imply 22 GHz / 1.296 THz photon luminosity ratios of 0.012, 0.12, and 0.83 respectiv"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.09672","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":"1705.09672","created_at":"2026-05-18T00:39:34.634756+00:00"},{"alias_kind":"arxiv_version","alias_value":"1705.09672v1","created_at":"2026-05-18T00:39:34.634756+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.09672","created_at":"2026-05-18T00:39:34.634756+00:00"},{"alias_kind":"pith_short_12","alias_value":"HZCW4ZQ6VEYO","created_at":"2026-05-18T12:31:21.493067+00:00"},{"alias_kind":"pith_short_16","alias_value":"HZCW4ZQ6VEYONB2T","created_at":"2026-05-18T12:31:21.493067+00:00"},{"alias_kind":"pith_short_8","alias_value":"HZCW4ZQ6","created_at":"2026-05-18T12:31:21.493067+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/HZCW4ZQ6VEYONB2TY6KPUREEYF","json":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF.json","graph_json":"https://pith.science/api/pith-number/HZCW4ZQ6VEYONB2TY6KPUREEYF/graph.json","events_json":"https://pith.science/api/pith-number/HZCW4ZQ6VEYONB2TY6KPUREEYF/events.json","paper":"https://pith.science/paper/HZCW4ZQ6"},"agent_actions":{"view_html":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF","download_json":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF.json","view_paper":"https://pith.science/paper/HZCW4ZQ6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1705.09672&json=true","fetch_graph":"https://pith.science/api/pith-number/HZCW4ZQ6VEYONB2TY6KPUREEYF/graph.json","fetch_events":"https://pith.science/api/pith-number/HZCW4ZQ6VEYONB2TY6KPUREEYF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF/action/storage_attestation","attest_author":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF/action/author_attestation","sign_citation":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF/action/citation_signature","submit_replication":"https://pith.science/pith/HZCW4ZQ6VEYONB2TY6KPUREEYF/action/replication_record"}},"created_at":"2026-05-18T00:39:34.634756+00:00","updated_at":"2026-05-18T00:39:34.634756+00:00"}