{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5HDDPV5LWX3B2QMMLWDGDNLEVN","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":"6d19a0d26905630edcd09c25533a3b96d636eaf1fedbd711c5b987131975c259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-09-22T20:23:47Z","title_canon_sha256":"c0720fbecddc976c4ad76a26aea754ebda689868ff0c16f096a6a10636595eb0"},"schema_version":"1.0","source":{"id":"1609.07156","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.07156","created_at":"2026-05-18T00:50:18Z"},{"alias_kind":"arxiv_version","alias_value":"1609.07156v1","created_at":"2026-05-18T00:50:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.07156","created_at":"2026-05-18T00:50:18Z"},{"alias_kind":"pith_short_12","alias_value":"5HDDPV5LWX3B","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5HDDPV5LWX3B2QMM","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5HDDPV5L","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:c4a8f9c213bc0605114a6ae6257e225db7feb549e9185ea5a30a681b263dbabd","target":"graph","created_at":"2026-05-18T00:50:18Z","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":"Recent observations have suggested that there is water ice present on the surfaces of 24 Themis and 1 Ceres. We present upper limits on the H$_2$O production rate on these bodies derived using a search for [OI]6300 Angstrom emission. For Themis, the water production is less than 4.5 $\\times$ 10$^{27}$ mol s$^{-1}$, while for Ceres our derived upper limit is 4.6 $\\times$ 10$^{28}$ mol s$^{-1}$. The derived limits imply a very low fraction of the surface area of each asteroid is active ($<$ 2 $\\times$ 10$^{-4}$), though this estimate varies by as much as an order of magnitude depending on therma","authors_text":"Adam J. McKay, Dennis Bodewits, Jian-Yang Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-09-22T20:23:47Z","title":"Observational Constraints on Water Sublimation from 24 Themis and 1 Ceres"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.07156","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":"sha256:6554e37c4a99ab769d3f902d97bb1892b9ca37209fa9640aa6444102beab2cdb","target":"record","created_at":"2026-05-18T00:50:18Z","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":"6d19a0d26905630edcd09c25533a3b96d636eaf1fedbd711c5b987131975c259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-09-22T20:23:47Z","title_canon_sha256":"c0720fbecddc976c4ad76a26aea754ebda689868ff0c16f096a6a10636595eb0"},"schema_version":"1.0","source":{"id":"1609.07156","kind":"arxiv","version":1}},"canonical_sha256":"e9c637d7abb5f61d418c5d8661b564ab5148d2ca0669202955894acca5e78041","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9c637d7abb5f61d418c5d8661b564ab5148d2ca0669202955894acca5e78041","first_computed_at":"2026-05-18T00:50:18.944028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:18.944028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tnN5h9XoAb2dYLiopdzyAf9B1nqQlgBrgAxWbdB74x10KpcbRkVL4cFABx3blvSlqRcWSR3GJtNn1BseMyD0Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:18.944612Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.07156","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6554e37c4a99ab769d3f902d97bb1892b9ca37209fa9640aa6444102beab2cdb","sha256:c4a8f9c213bc0605114a6ae6257e225db7feb549e9185ea5a30a681b263dbabd"],"state_sha256":"9321b344a19bf2155f5f75c8a662bc73ebfe99c787f56b47ac06105e2ecb3f60"}