{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:SJD3SSSMDGBU4UV5YYLDGLHLZZ","short_pith_number":"pith:SJD3SSSM","canonical_record":{"source":{"id":"astro-ph/0410136","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-10-06T01:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"1f73bce9eb839488ed9cbc2f80601bcf08c7896fbcc9a4bb95c77c46a91229db","abstract_canon_sha256":"93dec53b27053f79a071e923b184ab290e11aff4f3ce584dd6c0a7ee1274a6d9"},"schema_version":"1.0"},"canonical_sha256":"9247b94a4c19834e52bdc616332cebce46a79e738cfa136993617815c3693c74","source":{"kind":"arxiv","id":"astro-ph/0410136","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0410136","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0410136v1","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0410136","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"SJD3SSSMDGBU","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"SJD3SSSMDGBU4UV5","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"SJD3SSSM","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:SJD3SSSMDGBU4UV5YYLDGLHLZZ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0410136","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-10-06T01:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"1f73bce9eb839488ed9cbc2f80601bcf08c7896fbcc9a4bb95c77c46a91229db","abstract_canon_sha256":"93dec53b27053f79a071e923b184ab290e11aff4f3ce584dd6c0a7ee1274a6d9"},"schema_version":"1.0"},"canonical_sha256":"9247b94a4c19834e52bdc616332cebce46a79e738cfa136993617815c3693c74","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:43.657351Z","signature_b64":"b3BRCY9WjLh8E8VoHCwiZqi1MzwLbV+8SpfeYd29gBy6YdIlpdYtCD5hbz8v/oiAv/BQ85Jtoibg2T2lIfb1CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9247b94a4c19834e52bdc616332cebce46a79e738cfa136993617815c3693c74","last_reissued_at":"2026-05-18T03:47:43.656818Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:43.656818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0410136","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":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qXVzXXZbAM7hHeK4qcYK9jXgRu5qivsvCLtXfBkIq9oJcI8Pll8URez9w2EY89gVqFnYqaXBtIR3RqRI0/dNDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T22:59:37.122263Z"},"content_sha256":"48bbd4708f1402b4af636f170a93649dec5b2dd5d3e80b4c1e279b91259d7a8d","schema_version":"1.0","event_id":"sha256:48bbd4708f1402b4af636f170a93649dec5b2dd5d3e80b4c1e279b91259d7a8d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:SJD3SSSMDGBU4UV5YYLDGLHLZZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chandra Orion Ultradeep Project: Observations and Source Lists","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. A. Muench, C. J. Lada, E. D. Feigelson, E. Flaccomio, F. Damiani, F. R. Harnden, G. Meeus, G. Micela, G. P. Garmire, J. Bally, J. Kastner, J. Li, Jr., K. V. Getman, L. A. Hillenbrand, L. Townsley, M. J. McCaughrean, M. Tsujimoto, N. Grosso, P. S. Broos, S. Sciortino, S. S. Murray, S. Wolk, T. Preibisch, W. Herbst","submitted_at":"2004-10-06T01:47:58Z","abstract_excerpt":"We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observatory observation of the Orion Nebula Cluster and embedded populations around OMC-1. The observation was obtained with Chandra's Advanced CCD Imaging Spectrometer (ACIS) and has been nicknamed the Chandra Orion Ultradeep Project (COUP). With an 838 ks exposure made over a continuous period of 13.2 days, the COUP observation provides the most uniform and comprehensive dataset on the X-ray emission of normal stars ever o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0410136","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":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qAOX6biKncfFQI5e0nYzlO5D/U/ntmc2BIK8Yx1p2E2CEvyyHxAAf7/r+esoBAdnNb1LRbaR3NGFyckkh0saBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T22:59:37.122964Z"},"content_sha256":"892764218cff61c8f2d2a89a09e031c5eb2f8f496ab45f11dc7328de0e1de658","schema_version":"1.0","event_id":"sha256:892764218cff61c8f2d2a89a09e031c5eb2f8f496ab45f11dc7328de0e1de658"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/bundle.json","state_url":"https://pith.science/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/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":"2026-05-23T22:59:37Z","links":{"resolver":"https://pith.science/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ","bundle":"https://pith.science/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/bundle.json","state":"https://pith.science/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJD3SSSMDGBU4UV5YYLDGLHLZZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:SJD3SSSMDGBU4UV5YYLDGLHLZZ","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":"93dec53b27053f79a071e923b184ab290e11aff4f3ce584dd6c0a7ee1274a6d9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-10-06T01:47:58Z","title_canon_sha256":"1f73bce9eb839488ed9cbc2f80601bcf08c7896fbcc9a4bb95c77c46a91229db"},"schema_version":"1.0","source":{"id":"astro-ph/0410136","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0410136","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0410136v1","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0410136","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"SJD3SSSMDGBU","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"SJD3SSSMDGBU4UV5","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"SJD3SSSM","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:892764218cff61c8f2d2a89a09e031c5eb2f8f496ab45f11dc7328de0e1de658","target":"graph","created_at":"2026-05-18T03:47:43Z","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 present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observatory observation of the Orion Nebula Cluster and embedded populations around OMC-1. The observation was obtained with Chandra's Advanced CCD Imaging Spectrometer (ACIS) and has been nicknamed the Chandra Orion Ultradeep Project (COUP). With an 838 ks exposure made over a continuous period of 13.2 days, the COUP observation provides the most uniform and comprehensive dataset on the X-ray emission of normal stars ever o","authors_text":"A. A. Muench, C. J. Lada, E. D. Feigelson, E. Flaccomio, F. Damiani, F. R. Harnden, G. Meeus, G. Micela, G. P. Garmire, J. Bally, J. Kastner, J. Li, Jr., K. V. Getman, L. A. Hillenbrand, L. Townsley, M. J. McCaughrean, M. Tsujimoto, N. Grosso, P. S. Broos, S. Sciortino, S. S. Murray, S. Wolk, T. Preibisch, W. Herbst","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-10-06T01:47:58Z","title":"Chandra Orion Ultradeep Project: Observations and Source Lists"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0410136","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":"sha256:48bbd4708f1402b4af636f170a93649dec5b2dd5d3e80b4c1e279b91259d7a8d","target":"record","created_at":"2026-05-18T03:47:43Z","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":"93dec53b27053f79a071e923b184ab290e11aff4f3ce584dd6c0a7ee1274a6d9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-10-06T01:47:58Z","title_canon_sha256":"1f73bce9eb839488ed9cbc2f80601bcf08c7896fbcc9a4bb95c77c46a91229db"},"schema_version":"1.0","source":{"id":"astro-ph/0410136","kind":"arxiv","version":1}},"canonical_sha256":"9247b94a4c19834e52bdc616332cebce46a79e738cfa136993617815c3693c74","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9247b94a4c19834e52bdc616332cebce46a79e738cfa136993617815c3693c74","first_computed_at":"2026-05-18T03:47:43.656818Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:43.656818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b3BRCY9WjLh8E8VoHCwiZqi1MzwLbV+8SpfeYd29gBy6YdIlpdYtCD5hbz8v/oiAv/BQ85Jtoibg2T2lIfb1CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:43.657351Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0410136","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48bbd4708f1402b4af636f170a93649dec5b2dd5d3e80b4c1e279b91259d7a8d","sha256:892764218cff61c8f2d2a89a09e031c5eb2f8f496ab45f11dc7328de0e1de658"],"state_sha256":"6fe6a7df9fac49fd7a7cfd6b535c033feb62a064805bd1578b79bfed2bccca78"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bPm2r70etTjXWd8na05Je4QI1FmJlYeAnpM/kZ1f2DWApNqq8o0GcJUZudMrcZ5kxcfN0liyQparElIinMxdBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T22:59:37.125987Z","bundle_sha256":"ffb2a71da4d430bd9a2292f7c084b30bdcd900ef7f47f4260e0d1f3fedffeed1"}}