{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:G4ZF7RPSYBQA54TAZEKG2VTU3F","short_pith_number":"pith:G4ZF7RPS","schema_version":"1.0","canonical_sha256":"37325fc5f2c0600ef260c9146d5674d95fe2c10419bfaebe2594a7bc8ead0668","source":{"kind":"arxiv","id":"1912.06913","version":1},"attestation_state":"computed","paper":{"title":"Is pi Men c's atmosphere hydrogen-dominated? Insights from a non-detecton of Hy Ly-alpha absorption","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Allison Youngblood, Antonio Garc\\'ia Mu\\~noz, Davide Gandolfi, Heike Rauer, Juan Cabrera, Luca Fossati","submitted_at":"2019-12-14T20:02:46Z","abstract_excerpt":"Constraining the composition of super-Earth-to-sub-Neptune-size planets is a priority to understand the processes of planetary formation and evolution. pi Men c represents a unique target for the atmospheric and compositional characterization of such planets because it is strongly irradiated and its bulk density is consistent with abundant H2O. We searched for hydrogen from photodissociating H2/H2O in pi Men c's upper atmosphere through H i Ly-alpha transmission spectroscopy with the Hubble Space Telescope's STIS instrument, but did not detect it. We set 1 (3) upper limits for the effective pl"},"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":"1912.06913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-12-14T20:02:46Z","cross_cats_sorted":[],"title_canon_sha256":"044f38edeb054848329585c4e4e71483fe44a33f3c7a2b1efaf42d285ac7cf05","abstract_canon_sha256":"95fc71c8b23a413784f8137cd3d62cbbff5fb61bfe72ceff17d66ac002fa006b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:33:24.819223Z","signature_b64":"Df/1UzKa5M6UgcpdWzr4BMdyawkOyyiligTH5W+QWUIGVNTF1UE1mvhQIWsxmDvYw+hi/XfXIcnrStmFl0VHAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"37325fc5f2c0600ef260c9146d5674d95fe2c10419bfaebe2594a7bc8ead0668","last_reissued_at":"2026-07-05T00:33:24.818720Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:33:24.818720Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Is pi Men c's atmosphere hydrogen-dominated? Insights from a non-detecton of Hy Ly-alpha absorption","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Allison Youngblood, Antonio Garc\\'ia Mu\\~noz, Davide Gandolfi, Heike Rauer, Juan Cabrera, Luca Fossati","submitted_at":"2019-12-14T20:02:46Z","abstract_excerpt":"Constraining the composition of super-Earth-to-sub-Neptune-size planets is a priority to understand the processes of planetary formation and evolution. pi Men c represents a unique target for the atmospheric and compositional characterization of such planets because it is strongly irradiated and its bulk density is consistent with abundant H2O. We searched for hydrogen from photodissociating H2/H2O in pi Men c's upper atmosphere through H i Ly-alpha transmission spectroscopy with the Hubble Space Telescope's STIS instrument, but did not detect it. We set 1 (3) upper limits for the effective pl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.06913","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/1912.06913/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":"1912.06913","created_at":"2026-07-05T00:33:24.818783+00:00"},{"alias_kind":"arxiv_version","alias_value":"1912.06913v1","created_at":"2026-07-05T00:33:24.818783+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.06913","created_at":"2026-07-05T00:33:24.818783+00:00"},{"alias_kind":"pith_short_12","alias_value":"G4ZF7RPSYBQA","created_at":"2026-07-05T00:33:24.818783+00:00"},{"alias_kind":"pith_short_16","alias_value":"G4ZF7RPSYBQA54TA","created_at":"2026-07-05T00:33:24.818783+00:00"},{"alias_kind":"pith_short_8","alias_value":"G4ZF7RPS","created_at":"2026-07-05T00:33:24.818783+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/G4ZF7RPSYBQA54TAZEKG2VTU3F","json":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F.json","graph_json":"https://pith.science/api/pith-number/G4ZF7RPSYBQA54TAZEKG2VTU3F/graph.json","events_json":"https://pith.science/api/pith-number/G4ZF7RPSYBQA54TAZEKG2VTU3F/events.json","paper":"https://pith.science/paper/G4ZF7RPS"},"agent_actions":{"view_html":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F","download_json":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F.json","view_paper":"https://pith.science/paper/G4ZF7RPS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1912.06913&json=true","fetch_graph":"https://pith.science/api/pith-number/G4ZF7RPSYBQA54TAZEKG2VTU3F/graph.json","fetch_events":"https://pith.science/api/pith-number/G4ZF7RPSYBQA54TAZEKG2VTU3F/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F/action/timestamp_anchor","attest_storage":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F/action/storage_attestation","attest_author":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F/action/author_attestation","sign_citation":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F/action/citation_signature","submit_replication":"https://pith.science/pith/G4ZF7RPSYBQA54TAZEKG2VTU3F/action/replication_record"}},"created_at":"2026-07-05T00:33:24.818783+00:00","updated_at":"2026-07-05T00:33:24.818783+00:00"}