{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:CBODIHHLA4UTUH3BLDPCUAWU3T","short_pith_number":"pith:CBODIHHL","canonical_record":{"source":{"id":"0806.3968","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-24T20:35:53Z","cross_cats_sorted":[],"title_canon_sha256":"4753ac5bb6c98107289fb2201e42dbf6678dfe3a8f4330ecd921ee25c2853f9e","abstract_canon_sha256":"532e639dc5e23448ac56671ee4a3a9c976f87cc5744e3fd730693368b66063c1"},"schema_version":"1.0"},"canonical_sha256":"105c341ceb07293a1f6158de2a02d4dced10babbbb53b5c7d198a6708fa1ba76","source":{"kind":"arxiv","id":"0806.3968","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.3968","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0806.3968v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.3968","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"CBODIHHLA4UT","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"CBODIHHLA4UTUH3B","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"CBODIHHL","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:CBODIHHLA4UTUH3BLDPCUAWU3T","target":"record","payload":{"canonical_record":{"source":{"id":"0806.3968","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-24T20:35:53Z","cross_cats_sorted":[],"title_canon_sha256":"4753ac5bb6c98107289fb2201e42dbf6678dfe3a8f4330ecd921ee25c2853f9e","abstract_canon_sha256":"532e639dc5e23448ac56671ee4a3a9c976f87cc5744e3fd730693368b66063c1"},"schema_version":"1.0"},"canonical_sha256":"105c341ceb07293a1f6158de2a02d4dced10babbbb53b5c7d198a6708fa1ba76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:15.741087Z","signature_b64":"JjgG0zTdvLGuEigi6gkhoZc4zB8A98A5uNAylbiGlgTtuuPW+5BwfmIVGQfJ+2C5kaku3S+XrQNU0+B+2fjEBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"105c341ceb07293a1f6158de2a02d4dced10babbbb53b5c7d198a6708fa1ba76","last_reissued_at":"2026-05-18T02:35:15.740664Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:15.740664Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0806.3968","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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FreJvHuYdRl57mWXc1Nzba/clOIXVPmX75F+uJVcPLz4/vm3AUYM7/md0xBLMM0xdNWd3HJ/eLi/EFdlgH19BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:45.651199Z"},"content_sha256":"c3020cf8e384b9953b8d4923d2f9b104429dbed58926abe164549ab9efe96b1b","schema_version":"1.0","event_id":"sha256:c3020cf8e384b9953b8d4923d2f9b104429dbed58926abe164549ab9efe96b1b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:CBODIHHLA4UTUH3BLDPCUAWU3T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Chandra Deep Field-South Survey: 2 Ms Source Catalogs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. C. Fabian, A. Comastri, A. E. Hornschemeier, A. Finoguenov, A. Koekemoer, A. T. Steffen, B. D. Lehmer, B. Luo, C. Vignali, D. M. Alexander, D. P. Schneider, F. E. Bauer, G. Hasinger, I. Smail, J. D. Silverman, M. Brusa, M. Paolillo, O. Shemmer, P. Rosati, R. Gilli, V. Mainieri, W. N. Brandt","submitted_at":"2008-06-24T20:35:53Z","abstract_excerpt":"We present point-source catalogs for the ~2 Ms exposure of the Chandra Deep Field-South (CDF-S); this is one of the two most-sensitive X-ray surveys ever performed. The survey covers an area of ~436 arcmin^2 and reaches on-axis sensitivity limits of ~1.9x10^{-17} and ~1.3x10^{-16} ergs/cm^2/s for the 0.5-2.0 and 2-8 keV bands, respectively. Four hundred and sixty-two X-ray point sources are detected in at least one of three X-ray bands that were searched; 135 of these sources are new compared to the previous ~1 Ms CDF-S detections. Source positions are determined using centroid and matched-fil"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.3968","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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7yLfjN0pcZH1njMOnyFxyYEne2eblq/3hrZysT1wDHP4K8R8M5L6ooFct8LFl4eKvFF7+HJJ8JXK+0QiRDysAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:45.651589Z"},"content_sha256":"1095984fee99028096bc0dd9ecfd952fd4afbf0bb3d4689f1e77784d2e51b97f","schema_version":"1.0","event_id":"sha256:1095984fee99028096bc0dd9ecfd952fd4afbf0bb3d4689f1e77784d2e51b97f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/bundle.json","state_url":"https://pith.science/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/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":"2026-05-26T21:57:45Z","links":{"resolver":"https://pith.science/pith/CBODIHHLA4UTUH3BLDPCUAWU3T","bundle":"https://pith.science/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/bundle.json","state":"https://pith.science/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CBODIHHLA4UTUH3BLDPCUAWU3T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:CBODIHHLA4UTUH3BLDPCUAWU3T","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":"532e639dc5e23448ac56671ee4a3a9c976f87cc5744e3fd730693368b66063c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-24T20:35:53Z","title_canon_sha256":"4753ac5bb6c98107289fb2201e42dbf6678dfe3a8f4330ecd921ee25c2853f9e"},"schema_version":"1.0","source":{"id":"0806.3968","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.3968","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0806.3968v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.3968","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"CBODIHHLA4UT","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"CBODIHHLA4UTUH3B","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"CBODIHHL","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:1095984fee99028096bc0dd9ecfd952fd4afbf0bb3d4689f1e77784d2e51b97f","target":"graph","created_at":"2026-05-18T02:35:15Z","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 point-source catalogs for the ~2 Ms exposure of the Chandra Deep Field-South (CDF-S); this is one of the two most-sensitive X-ray surveys ever performed. The survey covers an area of ~436 arcmin^2 and reaches on-axis sensitivity limits of ~1.9x10^{-17} and ~1.3x10^{-16} ergs/cm^2/s for the 0.5-2.0 and 2-8 keV bands, respectively. Four hundred and sixty-two X-ray point sources are detected in at least one of three X-ray bands that were searched; 135 of these sources are new compared to the previous ~1 Ms CDF-S detections. Source positions are determined using centroid and matched-fil","authors_text":"A. C. Fabian, A. Comastri, A. E. Hornschemeier, A. Finoguenov, A. Koekemoer, A. T. Steffen, B. D. Lehmer, B. Luo, C. Vignali, D. M. Alexander, D. P. Schneider, F. E. Bauer, G. Hasinger, I. Smail, J. D. Silverman, M. Brusa, M. Paolillo, O. Shemmer, P. Rosati, R. Gilli, V. Mainieri, W. N. Brandt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-24T20:35:53Z","title":"The Chandra Deep Field-South Survey: 2 Ms Source Catalogs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.3968","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:c3020cf8e384b9953b8d4923d2f9b104429dbed58926abe164549ab9efe96b1b","target":"record","created_at":"2026-05-18T02:35:15Z","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":"532e639dc5e23448ac56671ee4a3a9c976f87cc5744e3fd730693368b66063c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-24T20:35:53Z","title_canon_sha256":"4753ac5bb6c98107289fb2201e42dbf6678dfe3a8f4330ecd921ee25c2853f9e"},"schema_version":"1.0","source":{"id":"0806.3968","kind":"arxiv","version":1}},"canonical_sha256":"105c341ceb07293a1f6158de2a02d4dced10babbbb53b5c7d198a6708fa1ba76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"105c341ceb07293a1f6158de2a02d4dced10babbbb53b5c7d198a6708fa1ba76","first_computed_at":"2026-05-18T02:35:15.740664Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:15.740664Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JjgG0zTdvLGuEigi6gkhoZc4zB8A98A5uNAylbiGlgTtuuPW+5BwfmIVGQfJ+2C5kaku3S+XrQNU0+B+2fjEBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:15.741087Z","signed_message":"canonical_sha256_bytes"},"source_id":"0806.3968","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3020cf8e384b9953b8d4923d2f9b104429dbed58926abe164549ab9efe96b1b","sha256:1095984fee99028096bc0dd9ecfd952fd4afbf0bb3d4689f1e77784d2e51b97f"],"state_sha256":"495aab246247c4a130a9faa443f00d2151cf708fa87d5ef1b0a2ce7fcea2bf22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n6p/YwbP3E/Uoofms525rL0lynx44lfcRNRzEwpzvkb+EwH3GeVwVSwYq3R88zTeYLu2gueBEGuq5e5Ywbi7Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:57:45.654251Z","bundle_sha256":"0dcdc9607bd650a8774eb4b3e2472b729e03b69935af821176be2b157575c480"}}