{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:ZFV5FJE37OEGH72O2TJHT6HOLK","short_pith_number":"pith:ZFV5FJE3","canonical_record":{"source":{"id":"0808.2661","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-19T21:28:18Z","cross_cats_sorted":[],"title_canon_sha256":"988e2ecb367b301d7bad4b1de09b6efd46a136695514689f85ca5f77e9a8b6e9","abstract_canon_sha256":"b15c4080606bc88d07221a1f5b2888b7d760c22c1c84dae04fa79f73ff57a755"},"schema_version":"1.0"},"canonical_sha256":"c96bd2a49bfb8863ff4ed4d279f8ee5ab5fac900dff9c3957b9fadc7e98442c2","source":{"kind":"arxiv","id":"0808.2661","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2661","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2661v1","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2661","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZFV5FJE37OEG","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_16","alias_value":"ZFV5FJE37OEGH72O","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_8","alias_value":"ZFV5FJE3","created_at":"2026-07-04T17:12:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:ZFV5FJE37OEGH72O2TJHT6HOLK","target":"record","payload":{"canonical_record":{"source":{"id":"0808.2661","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-19T21:28:18Z","cross_cats_sorted":[],"title_canon_sha256":"988e2ecb367b301d7bad4b1de09b6efd46a136695514689f85ca5f77e9a8b6e9","abstract_canon_sha256":"b15c4080606bc88d07221a1f5b2888b7d760c22c1c84dae04fa79f73ff57a755"},"schema_version":"1.0"},"canonical_sha256":"c96bd2a49bfb8863ff4ed4d279f8ee5ab5fac900dff9c3957b9fadc7e98442c2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:12:24.711071Z","signature_b64":"YohJ5CezqnsKLH/OZKjTrYYy8gbsGKo1EzJ+qFHe+pcFwe1s66SfGj7Ee5LwXdlmX10U7i9Sj6MNCJ4FMe11Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c96bd2a49bfb8863ff4ed4d279f8ee5ab5fac900dff9c3957b9fadc7e98442c2","last_reissued_at":"2026-07-04T17:12:24.710729Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:12:24.710729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.2661","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":"2026-07-04T17:12:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZJ1pjFZZOdKDM7xd6FhFunqNbvusueH2gb2EkP0eu2PVMRZJAYZwv4KI4PPKbzVtD+Z0eXf4McNDDEIt0vVXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T18:58:17.155534Z"},"content_sha256":"71b150a1413fbefc9652f7c74e165ff2def05a043e2cce00f9cf9c1a3129ccb4","schema_version":"1.0","event_id":"sha256:71b150a1413fbefc9652f7c74e165ff2def05a043e2cce00f9cf9c1a3129ccb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:ZFV5FJE37OEGH72O2TJHT6HOLK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Combined Chandra, XMM-Newton and Hubble Space Telescope observations of the Galactic globular cluster NGC 2808","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Dieball, C. Knigge, D. Barret, D. R. Zurek, K. S. Long, M. M. Shara, M. Servillat, N. A. Webb, R. Cornelisse","submitted_at":"2008-08-19T21:28:18Z","abstract_excerpt":"Using new Chandra X-ray observations and existing XMM-Newton X-ray and Hubble far ultraviolet observations, we aim to detect and identify the faint X-ray sources belonging to the Galactic globular cluster NGC 2808 in order to understand their role in the evolution of globular clusters. We present a Chandra X-ray observation of the Galactic globular cluster NGC 2808. We classify the X-ray sources associated with the cluster by analysing their colours and variability. Previous observations with XMM-Newton and far ultraviolet observations with the Hubble Space Telescope are re-investigated to hel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2661","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0808.2661/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:12:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yhgFSKdsW0w5YjBK8+SvhWacsOHTxR99A9J+BQhVdMHmtDBIRDs9hyKMlvnm/JPHXRXl+tGJHbor3IkHWjPYDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T18:58:17.155902Z"},"content_sha256":"cebf62775f43bbc7a25cd4ceacc14d0469eaca67604b00e6ce8ae30c4eb4da43","schema_version":"1.0","event_id":"sha256:cebf62775f43bbc7a25cd4ceacc14d0469eaca67604b00e6ce8ae30c4eb4da43"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/bundle.json","state_url":"https://pith.science/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/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":"2026-07-08T18:58:17Z","links":{"resolver":"https://pith.science/pith/ZFV5FJE37OEGH72O2TJHT6HOLK","bundle":"https://pith.science/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/bundle.json","state":"https://pith.science/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZFV5FJE37OEGH72O2TJHT6HOLK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:ZFV5FJE37OEGH72O2TJHT6HOLK","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":"b15c4080606bc88d07221a1f5b2888b7d760c22c1c84dae04fa79f73ff57a755","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-19T21:28:18Z","title_canon_sha256":"988e2ecb367b301d7bad4b1de09b6efd46a136695514689f85ca5f77e9a8b6e9"},"schema_version":"1.0","source":{"id":"0808.2661","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2661","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2661v1","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2661","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZFV5FJE37OEG","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_16","alias_value":"ZFV5FJE37OEGH72O","created_at":"2026-07-04T17:12:24Z"},{"alias_kind":"pith_short_8","alias_value":"ZFV5FJE3","created_at":"2026-07-04T17:12:24Z"}],"graph_snapshots":[{"event_id":"sha256:cebf62775f43bbc7a25cd4ceacc14d0469eaca67604b00e6ce8ae30c4eb4da43","target":"graph","created_at":"2026-07-04T17:12:24Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0808.2661/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using new Chandra X-ray observations and existing XMM-Newton X-ray and Hubble far ultraviolet observations, we aim to detect and identify the faint X-ray sources belonging to the Galactic globular cluster NGC 2808 in order to understand their role in the evolution of globular clusters. We present a Chandra X-ray observation of the Galactic globular cluster NGC 2808. We classify the X-ray sources associated with the cluster by analysing their colours and variability. Previous observations with XMM-Newton and far ultraviolet observations with the Hubble Space Telescope are re-investigated to hel","authors_text":"A. Dieball, C. Knigge, D. Barret, D. R. Zurek, K. S. Long, M. M. Shara, M. Servillat, N. A. Webb, R. Cornelisse","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-19T21:28:18Z","title":"Combined Chandra, XMM-Newton and Hubble Space Telescope observations of the Galactic globular cluster NGC 2808"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2661","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":"sha256:71b150a1413fbefc9652f7c74e165ff2def05a043e2cce00f9cf9c1a3129ccb4","target":"record","created_at":"2026-07-04T17:12:24Z","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":"b15c4080606bc88d07221a1f5b2888b7d760c22c1c84dae04fa79f73ff57a755","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-19T21:28:18Z","title_canon_sha256":"988e2ecb367b301d7bad4b1de09b6efd46a136695514689f85ca5f77e9a8b6e9"},"schema_version":"1.0","source":{"id":"0808.2661","kind":"arxiv","version":1}},"canonical_sha256":"c96bd2a49bfb8863ff4ed4d279f8ee5ab5fac900dff9c3957b9fadc7e98442c2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c96bd2a49bfb8863ff4ed4d279f8ee5ab5fac900dff9c3957b9fadc7e98442c2","first_computed_at":"2026-07-04T17:12:24.710729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:12:24.710729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YohJ5CezqnsKLH/OZKjTrYYy8gbsGKo1EzJ+qFHe+pcFwe1s66SfGj7Ee5LwXdlmX10U7i9Sj6MNCJ4FMe11Dw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:12:24.711071Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.2661","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71b150a1413fbefc9652f7c74e165ff2def05a043e2cce00f9cf9c1a3129ccb4","sha256:cebf62775f43bbc7a25cd4ceacc14d0469eaca67604b00e6ce8ae30c4eb4da43"],"state_sha256":"53dd75198c9162ac02502abda1d2180c69796a2137358f87f32e31ec39454a39"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6pURRivB2/ZPX8CMWjH5HOMmQN0deIsLNAwf6w4vz5w1dE/Ca8Lt00b4g6h0Xd0ZNlLHd59sDb/DKs+M90TnBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T18:58:17.157994Z","bundle_sha256":"a0d8b7bbb41e8b3b4b986f30a9582e8a2c2274b1762603ceaa5c31eba427624f"}}