{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TUOAAHR3RKVICRY6MT5B7FXCEG","short_pith_number":"pith:TUOAAHR3","canonical_record":{"source":{"id":"1511.03943","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-12T16:14:52Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"28ae377aa3838bc822a01c117c1110d2d1791581af3351f1f8d9ae77bae5d89d","abstract_canon_sha256":"896ac44381bea53baca3c0df847122e5b0445baddfa62b312eef80dc45dc0040"},"schema_version":"1.0"},"canonical_sha256":"9d1c001e3b8aaa81471e64fa1f96e221b594659b72008406a5421e312e261641","source":{"kind":"arxiv","id":"1511.03943","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.03943","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"arxiv_version","alias_value":"1511.03943v1","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.03943","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"pith_short_12","alias_value":"TUOAAHR3RKVI","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TUOAAHR3RKVICRY6","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TUOAAHR3","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TUOAAHR3RKVICRY6MT5B7FXCEG","target":"record","payload":{"canonical_record":{"source":{"id":"1511.03943","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-12T16:14:52Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"28ae377aa3838bc822a01c117c1110d2d1791581af3351f1f8d9ae77bae5d89d","abstract_canon_sha256":"896ac44381bea53baca3c0df847122e5b0445baddfa62b312eef80dc45dc0040"},"schema_version":"1.0"},"canonical_sha256":"9d1c001e3b8aaa81471e64fa1f96e221b594659b72008406a5421e312e261641","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:06.400065Z","signature_b64":"XVnJfnMIb5gxz/VJ5SaHW6xIzN2HSNJtk23Pts2msu0JJ5FKspOulmrvyYBlsZ82QIribSffSvaxVj+/SitnAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d1c001e3b8aaa81471e64fa1f96e221b594659b72008406a5421e312e261641","last_reissued_at":"2026-05-18T01:27:06.399325Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:06.399325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.03943","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":"2026-05-18T01:27:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ztd81OUQvbrQKc3zOtQK90rJnRYymnOh9LRNPbwLekVEbNq/3FLTLP4/sZ+DWAg7k+GyWXRjcI470a4BiZm9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T19:11:18.764099Z"},"content_sha256":"0eb514e656a7b730249f2c55f066a3280deaeaa7542e9a23b6661e4a6094a831","schema_version":"1.0","event_id":"sha256:0eb514e656a7b730249f2c55f066a3280deaeaa7542e9a23b6661e4a6094a831"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TUOAAHR3RKVICRY6MT5B7FXCEG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simulating the sensitivity to stellar point sources of Chandra X-ray observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Andreas Zezas, Jeremy J. Drake, Mario G. Guarcello, Nicholas J. Wright, Vinay L. Kashyap","submitted_at":"2015-11-12T16:14:52Z","abstract_excerpt":"The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ~8,000 X-ray sources, the majority of which are pre-main sequence X-ray emitting young stars in the association itself. To facilitate quantitative scientific studies of these sources as well as the underlying OB association it is important to understand the sensitivity of the observations and the level of completeness the observations have obtained. Here we describe the use of a hierarchical Monte Carlo simulation to achieve this goal by combining the e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.03943","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":"2026-05-18T01:27:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YaQ8E99nUhOEyl32OU+OFqMWygvfp0C7qvdKGqdtRjvobJy4N3k4JOsbYEvURiUqu33cile+WmBz4EZi++29AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T19:11:18.764901Z"},"content_sha256":"550df8081e2c8bf8b2ce38e29eb21bf0c184fd17127d01cec6d7f2515c5a30ce","schema_version":"1.0","event_id":"sha256:550df8081e2c8bf8b2ce38e29eb21bf0c184fd17127d01cec6d7f2515c5a30ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/bundle.json","state_url":"https://pith.science/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/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":"2026-05-30T19:11:18Z","links":{"resolver":"https://pith.science/pith/TUOAAHR3RKVICRY6MT5B7FXCEG","bundle":"https://pith.science/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/bundle.json","state":"https://pith.science/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TUOAAHR3RKVICRY6MT5B7FXCEG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TUOAAHR3RKVICRY6MT5B7FXCEG","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":"896ac44381bea53baca3c0df847122e5b0445baddfa62b312eef80dc45dc0040","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-12T16:14:52Z","title_canon_sha256":"28ae377aa3838bc822a01c117c1110d2d1791581af3351f1f8d9ae77bae5d89d"},"schema_version":"1.0","source":{"id":"1511.03943","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.03943","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"arxiv_version","alias_value":"1511.03943v1","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.03943","created_at":"2026-05-18T01:27:06Z"},{"alias_kind":"pith_short_12","alias_value":"TUOAAHR3RKVI","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TUOAAHR3RKVICRY6","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TUOAAHR3","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:550df8081e2c8bf8b2ce38e29eb21bf0c184fd17127d01cec6d7f2515c5a30ce","target":"graph","created_at":"2026-05-18T01:27:06Z","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":"The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ~8,000 X-ray sources, the majority of which are pre-main sequence X-ray emitting young stars in the association itself. To facilitate quantitative scientific studies of these sources as well as the underlying OB association it is important to understand the sensitivity of the observations and the level of completeness the observations have obtained. Here we describe the use of a hierarchical Monte Carlo simulation to achieve this goal by combining the e","authors_text":"Andreas Zezas, Jeremy J. Drake, Mario G. Guarcello, Nicholas J. Wright, Vinay L. Kashyap","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-12T16:14:52Z","title":"Simulating the sensitivity to stellar point sources of Chandra X-ray observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.03943","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":"sha256:0eb514e656a7b730249f2c55f066a3280deaeaa7542e9a23b6661e4a6094a831","target":"record","created_at":"2026-05-18T01:27:06Z","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":"896ac44381bea53baca3c0df847122e5b0445baddfa62b312eef80dc45dc0040","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-12T16:14:52Z","title_canon_sha256":"28ae377aa3838bc822a01c117c1110d2d1791581af3351f1f8d9ae77bae5d89d"},"schema_version":"1.0","source":{"id":"1511.03943","kind":"arxiv","version":1}},"canonical_sha256":"9d1c001e3b8aaa81471e64fa1f96e221b594659b72008406a5421e312e261641","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d1c001e3b8aaa81471e64fa1f96e221b594659b72008406a5421e312e261641","first_computed_at":"2026-05-18T01:27:06.399325Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:06.399325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XVnJfnMIb5gxz/VJ5SaHW6xIzN2HSNJtk23Pts2msu0JJ5FKspOulmrvyYBlsZ82QIribSffSvaxVj+/SitnAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:06.400065Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.03943","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0eb514e656a7b730249f2c55f066a3280deaeaa7542e9a23b6661e4a6094a831","sha256:550df8081e2c8bf8b2ce38e29eb21bf0c184fd17127d01cec6d7f2515c5a30ce"],"state_sha256":"7f76ddf558cfaa8cb86be20cb0010d05a2c69c330983e0dd02bfb488fcba530b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XIauaNjlqKrIIpn1wSlSV92iCscOsNs035t9hTR8y8VFKOdQJlt4d1bCm8bc67w9f+EOJwPXM6sT8/WLNv00Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T19:11:18.768988Z","bundle_sha256":"30340ab31f854aeba1bffd9eaa59f2892b8087c4e2d61bfed48d6ea525dbb68f"}}