{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:66E75TUUUUBKB2VEV6XM2OQ2FI","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":"8d3121d403cbb16913aa2fbfd8fdbe396a02de5917051558f5597fab7179a4b8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-27T09:47:15Z","title_canon_sha256":"cce2789d17a25b90791d5473566879421118eca793ebb7a66cc4cc006773e584"},"schema_version":"1.0","source":{"id":"astro-ph/0305502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0305502","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305502v1","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305502","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"pith_short_12","alias_value":"66E75TUUUUBK","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"66E75TUUUUBKB2VE","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"66E75TUU","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:6b74acb3a44efddd10ea01382a41a3501d3d8a58662774a5c5d4b6246ea3a39c","target":"graph","created_at":"2026-05-18T04:21:41Z","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 report on the discovery of a mid-infrared source at a projected distance of only 1200 AU from the O9.5 V star sigma Orionis. The spatially resolved, fan-shaped morphology and the presence of an ionization front, as well as evidence in the spectrum for processed dust grains, all suggest that it is a proto-planetary disk being dispersed by the intense ultraviolet radiation from sigma Orionis. We compute the mass budget and the photo-evaporation timescale, and discuss the possible nature of this remarkable object.","authors_text":"Jacco Th. van Loon, Joana M. Oliveira (Keele University, UK)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-05-27T09:47:15Z","title":"Discovery of a dust cloud next to sigma Orionis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305502","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":"sha256:949c16f1558682e4b6a273442b518e00891ac32a8fe97934de17cb8cb170e453","target":"record","created_at":"2026-05-18T04:21:41Z","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":"8d3121d403cbb16913aa2fbfd8fdbe396a02de5917051558f5597fab7179a4b8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-27T09:47:15Z","title_canon_sha256":"cce2789d17a25b90791d5473566879421118eca793ebb7a66cc4cc006773e584"},"schema_version":"1.0","source":{"id":"astro-ph/0305502","kind":"arxiv","version":1}},"canonical_sha256":"f789fece94a502a0eaa4afaecd3a1a2a164edb052178d65ae9a29efbb6dc0ee7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f789fece94a502a0eaa4afaecd3a1a2a164edb052178d65ae9a29efbb6dc0ee7","first_computed_at":"2026-05-18T04:21:41.467206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:41.467206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mTKb4er9BgSKgeOuwqmaH8bKFHiPb3dWadad57yslx8IhvRWbakl8TEY3H542d3WhgN/4opIacihfbZkujz+Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:41.467715Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0305502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:949c16f1558682e4b6a273442b518e00891ac32a8fe97934de17cb8cb170e453","sha256:6b74acb3a44efddd10ea01382a41a3501d3d8a58662774a5c5d4b6246ea3a39c"],"state_sha256":"0fbaa8ae083e861f6e139e726cca8be16123fc1fead7d541dd187d896556db81"}