{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:JWWCUTMXNXBSBU57BTPSPJICOJ","short_pith_number":"pith:JWWCUTMX","schema_version":"1.0","canonical_sha256":"4dac2a4d976dc320d3bf0cdf27a50272613cfd22f356e2f5b02feabc23967707","source":{"kind":"arxiv","id":"astro-ph/0701700","version":1},"attestation_state":"computed","paper":{"title":"Deuterium fractionation in the Horsehead edge","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"David Teyssier (ESAC), Javier R. Goicoechea (LERMA), J\\'er\\^ome Pety (IRAM, LERMA), Maryvonne Gerin (LERMA), Pierre Hily-Blant (IRAM)","submitted_at":"2007-01-24T18:23:39Z","abstract_excerpt":"Deuterium fractionation is known to enhance the [DCO+]/[HCO+] abundance ratio over the D/H elemental ratio of about 1e-5 in the cold and dense gas typically found in pre-stellar cores. We report the first detection and mapping of very bright DCO+ J=3-2 and J=2-1 lines (3 and 4 K respectively) towards the Horsehead photodissociation region (PDR) observed with the IRAM-30m telescope. The DCO+ emission peaks close to the illuminated warm edge of the nebula (< 50\" or about 0.1 pc away). Detailed nonlocal, non-LTE excitation and radiative transfer analyses have been used to determine the prevailing"},"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":"astro-ph/0701700","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-24T18:23:39Z","cross_cats_sorted":[],"title_canon_sha256":"d9fe5b2106b566e90df9a860b922e9239faddf491f014f65cf98f5e821397777","abstract_canon_sha256":"2b40a56c9246fbe2770dd0d074a860c2dce12cc10ccb40a6ab99afd76595f0f1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:21.717760Z","signature_b64":"RnoYArAPU+z2sPLWwPHKTcrY8xTdHu/P1OE3YQU2Lb87PKNRzBiDehfHkHwuwtFZTwPWA7MXTzy8kd+TJtfeCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4dac2a4d976dc320d3bf0cdf27a50272613cfd22f356e2f5b02feabc23967707","last_reissued_at":"2026-05-18T01:09:21.717235Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:21.717235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Deuterium fractionation in the Horsehead edge","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"David Teyssier (ESAC), Javier R. Goicoechea (LERMA), J\\'er\\^ome Pety (IRAM, LERMA), Maryvonne Gerin (LERMA), Pierre Hily-Blant (IRAM)","submitted_at":"2007-01-24T18:23:39Z","abstract_excerpt":"Deuterium fractionation is known to enhance the [DCO+]/[HCO+] abundance ratio over the D/H elemental ratio of about 1e-5 in the cold and dense gas typically found in pre-stellar cores. We report the first detection and mapping of very bright DCO+ J=3-2 and J=2-1 lines (3 and 4 K respectively) towards the Horsehead photodissociation region (PDR) observed with the IRAM-30m telescope. The DCO+ emission peaks close to the illuminated warm edge of the nebula (< 50\" or about 0.1 pc away). Detailed nonlocal, non-LTE excitation and radiative transfer analyses have been used to determine the prevailing"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0701700","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":"astro-ph/0701700","created_at":"2026-05-18T01:09:21.717327+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0701700v1","created_at":"2026-05-18T01:09:21.717327+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0701700","created_at":"2026-05-18T01:09:21.717327+00:00"},{"alias_kind":"pith_short_12","alias_value":"JWWCUTMXNXBS","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_16","alias_value":"JWWCUTMXNXBSBU57","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_8","alias_value":"JWWCUTMX","created_at":"2026-05-18T12:25:55.427421+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/JWWCUTMXNXBSBU57BTPSPJICOJ","json":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ.json","graph_json":"https://pith.science/api/pith-number/JWWCUTMXNXBSBU57BTPSPJICOJ/graph.json","events_json":"https://pith.science/api/pith-number/JWWCUTMXNXBSBU57BTPSPJICOJ/events.json","paper":"https://pith.science/paper/JWWCUTMX"},"agent_actions":{"view_html":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ","download_json":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ.json","view_paper":"https://pith.science/paper/JWWCUTMX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0701700&json=true","fetch_graph":"https://pith.science/api/pith-number/JWWCUTMXNXBSBU57BTPSPJICOJ/graph.json","fetch_events":"https://pith.science/api/pith-number/JWWCUTMXNXBSBU57BTPSPJICOJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ/action/storage_attestation","attest_author":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ/action/author_attestation","sign_citation":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ/action/citation_signature","submit_replication":"https://pith.science/pith/JWWCUTMXNXBSBU57BTPSPJICOJ/action/replication_record"}},"created_at":"2026-05-18T01:09:21.717327+00:00","updated_at":"2026-05-18T01:09:21.717327+00:00"}