{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:VNDQ76J6455JERUNWFJJDSBLVM","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":"fd662accddc0ba8de08ff511794eb0ee1524616fd1d527e868d6a7efa58d7104","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-20T20:13:19Z","title_canon_sha256":"454a2c01f19ca89e7cd4296086015a156caa388dbc4109cfcdedb74aacbebcf4"},"schema_version":"1.0","source":{"id":"1005.3828","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.3828","created_at":"2026-05-18T02:07:16Z"},{"alias_kind":"arxiv_version","alias_value":"1005.3828v1","created_at":"2026-05-18T02:07:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.3828","created_at":"2026-05-18T02:07:16Z"},{"alias_kind":"pith_short_12","alias_value":"VNDQ76J6455J","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VNDQ76J6455JERUN","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VNDQ76J6","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:371a91946ed7c857ecba7fa9125b65856859f5bd8baa3398c4272c73c9c5e346","target":"graph","created_at":"2026-05-18T02:07:16Z","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":"In an effort to simultaneously study the gas and dust components of the disc surrounding the young Herbig Ae star HD 169142, we present far-IR observations obtained with the PACS instrument onboard the Herschel Space Observatory. This work is part of the Open Time Key Project GASPS, which is aimed at studying the evolution of protoplanetary discs. To constrain the gas properties in the outer disc, we observed the star at several key gas-lines, including [OI] 63.2 and 145.5 micron, [CII] 157.7 micron, CO 72.8 and 90.2 micron, and o-H2O 78.7 and 179.5 micron. We only detect the [OI] 63.2 micron ","authors_text":"A. Heras, A. Krivov, A. Mora, A. Roberge, B. Montesinos, B. Riaz, B. Vandenbussche, C.A. Grady, C.D. Howard, C. Eiroa, C. Martin-Zaidi, C. Pinte, D. Barrado, D. Fedele, D.R. Ardila, D.R. Ciardi, D.R. Poelman, E. Pantin, E. Solano, F. M\\'enard, G. Aresu, G. Duch\\^ene, G.J. White, G. Meeus, G. Sandell, G.S. Mathews, G. Wright, H. Nomura, H. Walker, I. de Gregorio-Monsalvo, I. Kamp, I. Mendigut\\'ia, I. Pascucci, I. Tilling, J.C. Augereau, J. Lebreton, J.M. Alacid, J.P. Williams, K. Rice, L. Podio, M. Morales-Calderon, N. Huelamo, N. Phillips, P. Riviere-Marichalar, P. Woitke, R. Liseau, S. Andrews, S. Brittain, S. Ramsay, the GASPS Collaboration, W. Danchi, W.F. Thi, W.R.F. Dent","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-20T20:13:19Z","title":"Gas in the protoplanetary disc of HD 169142: Herschel's view"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.3828","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:cf3cd17c8bf568a77a563cc5dd1f04b28511edb9f54803814e6ce6553d4b3c28","target":"record","created_at":"2026-05-18T02:07:16Z","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":"fd662accddc0ba8de08ff511794eb0ee1524616fd1d527e868d6a7efa58d7104","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-20T20:13:19Z","title_canon_sha256":"454a2c01f19ca89e7cd4296086015a156caa388dbc4109cfcdedb74aacbebcf4"},"schema_version":"1.0","source":{"id":"1005.3828","kind":"arxiv","version":1}},"canonical_sha256":"ab470ff93ee77a92468db15291c82bab222765820f1295d27bffd168bcfeaf21","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab470ff93ee77a92468db15291c82bab222765820f1295d27bffd168bcfeaf21","first_computed_at":"2026-05-18T02:07:16.032046Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:16.032046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X3puLvZ/lzgjflrDWR2OEGNUTVyztTIAc5n+bI7XBsgfYiFBeVc8HohoKKtpKo9hdEN8XtrkgDVMqUjHC6ITAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:16.032788Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.3828","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf3cd17c8bf568a77a563cc5dd1f04b28511edb9f54803814e6ce6553d4b3c28","sha256:371a91946ed7c857ecba7fa9125b65856859f5bd8baa3398c4272c73c9c5e346"],"state_sha256":"79c931b16d468ef0ed6271c9b4d462f58a3af306980db1acd7a4879e2c752f62"}