{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:Z2G2WBDE77D2Z4LO7JMSGIFTUU","short_pith_number":"pith:Z2G2WBDE","schema_version":"1.0","canonical_sha256":"ce8dab0464ffc7acf16efa592320b3a506c3c0f361b629c127781a59b50891dd","source":{"kind":"arxiv","id":"1911.13005","version":1},"attestation_state":"computed","paper":{"title":"Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"B. Fiethe, C. Briois, F. Dhooghe, H. Balsiger, H. Cottin, I. Schroeder, J. De Keyser, J.-J. Berthelier, K. Altwegg, M. Combi, M. Rubin, M. Schuhmann, N. H\\\"anni, S. A. Fuselier, S. Wampfler, T. I. Gombosi, T. S\\'emon","submitted_at":"2019-11-29T09:07:22Z","abstract_excerpt":"Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH3 and HCN. It is known that ammonia readily combines with many acids like e.g. HCN, HNCO, HCOOH, etc. encountered in the interstellar medium as well as in cometary ice to form ammonium salts (NH4+X-) at low temperatures. Ammonium salts, which can play a significant role in prebiotic chemistry, are hard to detect in space as they are unstable in the gas phase and their infrared signature is often hidden by thermal radiation or by e.g. OH in minerals. Here we report the presence of all poss"},"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":"1911.13005","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T09:07:22Z","cross_cats_sorted":[],"title_canon_sha256":"4ff92d5315f621e61231bfab4c46f6f8542e61a3c69734d464acbac157aa9514","abstract_canon_sha256":"4e60e3f033f98d0be16008d3d249e086cc9af4e105987804e435f0553de9126e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:22:51.185363Z","signature_b64":"jm8c4wCRAR5vigYHCVmBXXjCICjFovzN9dzrusJGZu2eq+MGGolxqXiyGH6bHVfeOxhPbIKpvggHoANss8skBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce8dab0464ffc7acf16efa592320b3a506c3c0f361b629c127781a59b50891dd","last_reissued_at":"2026-07-05T00:22:51.185004Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:22:51.185004Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence of ammonium salts in comet 67P as explanation for the nitrogen depletion in cometary comae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"B. Fiethe, C. Briois, F. Dhooghe, H. Balsiger, H. Cottin, I. Schroeder, J. De Keyser, J.-J. Berthelier, K. Altwegg, M. Combi, M. Rubin, M. Schuhmann, N. H\\\"anni, S. A. Fuselier, S. Wampfler, T. I. Gombosi, T. S\\'emon","submitted_at":"2019-11-29T09:07:22Z","abstract_excerpt":"Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH3 and HCN. It is known that ammonia readily combines with many acids like e.g. HCN, HNCO, HCOOH, etc. encountered in the interstellar medium as well as in cometary ice to form ammonium salts (NH4+X-) at low temperatures. Ammonium salts, which can play a significant role in prebiotic chemistry, are hard to detect in space as they are unstable in the gas phase and their infrared signature is often hidden by thermal radiation or by e.g. OH in minerals. Here we report the presence of all poss"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.13005","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.13005/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1911.13005","created_at":"2026-07-05T00:22:51.185060+00:00"},{"alias_kind":"arxiv_version","alias_value":"1911.13005v1","created_at":"2026-07-05T00:22:51.185060+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.13005","created_at":"2026-07-05T00:22:51.185060+00:00"},{"alias_kind":"pith_short_12","alias_value":"Z2G2WBDE77D2","created_at":"2026-07-05T00:22:51.185060+00:00"},{"alias_kind":"pith_short_16","alias_value":"Z2G2WBDE77D2Z4LO","created_at":"2026-07-05T00:22:51.185060+00:00"},{"alias_kind":"pith_short_8","alias_value":"Z2G2WBDE","created_at":"2026-07-05T00:22:51.185060+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/Z2G2WBDE77D2Z4LO7JMSGIFTUU","json":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU.json","graph_json":"https://pith.science/api/pith-number/Z2G2WBDE77D2Z4LO7JMSGIFTUU/graph.json","events_json":"https://pith.science/api/pith-number/Z2G2WBDE77D2Z4LO7JMSGIFTUU/events.json","paper":"https://pith.science/paper/Z2G2WBDE"},"agent_actions":{"view_html":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU","download_json":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU.json","view_paper":"https://pith.science/paper/Z2G2WBDE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1911.13005&json=true","fetch_graph":"https://pith.science/api/pith-number/Z2G2WBDE77D2Z4LO7JMSGIFTUU/graph.json","fetch_events":"https://pith.science/api/pith-number/Z2G2WBDE77D2Z4LO7JMSGIFTUU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU/action/storage_attestation","attest_author":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU/action/author_attestation","sign_citation":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU/action/citation_signature","submit_replication":"https://pith.science/pith/Z2G2WBDE77D2Z4LO7JMSGIFTUU/action/replication_record"}},"created_at":"2026-07-05T00:22:51.185060+00:00","updated_at":"2026-07-05T00:22:51.185060+00:00"}