{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:66E75TUUUUBKB2VEV6XM2OQ2FI","short_pith_number":"pith:66E75TUU","canonical_record":{"source":{"id":"astro-ph/0305502","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-27T09:47:15Z","cross_cats_sorted":[],"title_canon_sha256":"cce2789d17a25b90791d5473566879421118eca793ebb7a66cc4cc006773e584","abstract_canon_sha256":"8d3121d403cbb16913aa2fbfd8fdbe396a02de5917051558f5597fab7179a4b8"},"schema_version":"1.0"},"canonical_sha256":"f789fece94a502a0eaa4afaecd3a1a2a164edb052178d65ae9a29efbb6dc0ee7","source":{"kind":"arxiv","id":"astro-ph/0305502","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:66E75TUUUUBKB2VEV6XM2OQ2FI","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0305502","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-27T09:47:15Z","cross_cats_sorted":[],"title_canon_sha256":"cce2789d17a25b90791d5473566879421118eca793ebb7a66cc4cc006773e584","abstract_canon_sha256":"8d3121d403cbb16913aa2fbfd8fdbe396a02de5917051558f5597fab7179a4b8"},"schema_version":"1.0"},"canonical_sha256":"f789fece94a502a0eaa4afaecd3a1a2a164edb052178d65ae9a29efbb6dc0ee7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:41.467715Z","signature_b64":"mTKb4er9BgSKgeOuwqmaH8bKFHiPb3dWadad57yslx8IhvRWbakl8TEY3H542d3WhgN/4opIacihfbZkujz+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f789fece94a502a0eaa4afaecd3a1a2a164edb052178d65ae9a29efbb6dc0ee7","last_reissued_at":"2026-05-18T04:21:41.467206Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:41.467206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0305502","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:21:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rb660SSVhnAwCQACOL7szJTYHzUfdS1l6DLQh1ulZDbkblVglmSDLfCrr7vWg2jc9/3ShhyrVrVvWd5ldHmGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T07:41:26.283855Z"},"content_sha256":"949c16f1558682e4b6a273442b518e00891ac32a8fe97934de17cb8cb170e453","schema_version":"1.0","event_id":"sha256:949c16f1558682e4b6a273442b518e00891ac32a8fe97934de17cb8cb170e453"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:66E75TUUUUBKB2VEV6XM2OQ2FI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of a dust cloud next to sigma Orionis","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jacco Th. van Loon, Joana M. Oliveira (Keele University, UK)","submitted_at":"2003-05-27T09:47:15Z","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."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305502","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:21:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qwvL1u7GwXBJgqewLMKNrRcKfw/ANiJSECiQvcfokzgbf/U76l+4o7DkeKc34pe9LYZQciLFLmip/GlnBbVSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T07:41:26.284542Z"},"content_sha256":"6b74acb3a44efddd10ea01382a41a3501d3d8a58662774a5c5d4b6246ea3a39c","schema_version":"1.0","event_id":"sha256:6b74acb3a44efddd10ea01382a41a3501d3d8a58662774a5c5d4b6246ea3a39c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/bundle.json","state_url":"https://pith.science/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-10T07:41:26Z","links":{"resolver":"https://pith.science/pith/66E75TUUUUBKB2VEV6XM2OQ2FI","bundle":"https://pith.science/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/bundle.json","state":"https://pith.science/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/66E75TUUUUBKB2VEV6XM2OQ2FI/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rd4JM2TiFg+2Wp6nXKrTEATx/L2VOK/tq8XfADfUq3Vuv+905kFhCsJ7j1MIbjPiPqNQcUQ9n2QF2Dpz0xXkAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T07:41:26.289217Z","bundle_sha256":"8ddd862390e15a6e3c8146fb4e1c3dd5038986cc69941d5991182c98084304be"}}