{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ZY623L2B4WXOUEVLJUQIU6XDFQ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"83237406c5885b5df0aca2651441075e4b42beb628f4a0362a70221dfc8554a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-12T20:51:01Z","title_canon_sha256":"d0b05190599bf64a06c6a4808745dcca18caeb8bd814fe0745210bd7923bd48c"},"schema_version":"1.0","source":{"id":"1303.3023","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3023","created_at":"2026-05-18T03:31:06Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3023v1","created_at":"2026-05-18T03:31:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3023","created_at":"2026-05-18T03:31:06Z"},{"alias_kind":"pith_short_12","alias_value":"ZY623L2B4WXO","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZY623L2B4WXOUEVL","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZY623L2B","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:5b6974c0001b8e100210241edfd8cfa770e7ac45e57d5b918441a979ffa10d95","target":"graph","created_at":"2026-05-18T03:31:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We have searched for the presence of simple P and S-bearing molecules in Titan's atmosphere, by looking for the characteristic signatures of phosphine and hydrogen sulfide in infrared spectra obtained by Cassini CIRS. As a result we have placed the first upper limits on the stratospheric abundances, which are 1 ppb (PH3) and 330 ppb (H2S), at the 2-sigma significance level.","authors_text":"Conor A. Nixon, Nicolas A. Teanby, Patrick G.J. Irwin, Sarah M. Horst","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-12T20:51:01Z","title":"Upper limits for PH3 and H2S in Titan's Atmosphere from Cassini CIRS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3023","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7e62aaf73d8446f719532d471a609eb96c28bfcc404d6e548fdd6f52ccc4f501","target":"record","created_at":"2026-05-18T03:31:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"83237406c5885b5df0aca2651441075e4b42beb628f4a0362a70221dfc8554a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-03-12T20:51:01Z","title_canon_sha256":"d0b05190599bf64a06c6a4808745dcca18caeb8bd814fe0745210bd7923bd48c"},"schema_version":"1.0","source":{"id":"1303.3023","kind":"arxiv","version":1}},"canonical_sha256":"ce3dadaf41e5aeea12ab4d208a7ae32c17d5f263c34776f86b58b4888130a6f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce3dadaf41e5aeea12ab4d208a7ae32c17d5f263c34776f86b58b4888130a6f8","first_computed_at":"2026-05-18T03:31:06.021557Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:06.021557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aCiVfw7SUCqYW8NmROK1czlq08C3i9hsAp21Iu6lUldYUmI3q0eebwVgh68jYkGJr/fspxK5SURiI4gK5e7GDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:06.022218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.3023","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e62aaf73d8446f719532d471a609eb96c28bfcc404d6e548fdd6f52ccc4f501","sha256:5b6974c0001b8e100210241edfd8cfa770e7ac45e57d5b918441a979ffa10d95"],"state_sha256":"590ad61deca5abb6e22334b0e064d337d5afd2b5a76b9722bed8ecd8162a669f"}