{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:3PLXXOV3JKPRSDWWJ327Q6KPXJ","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":"151cea93ccd48cf7033046e96ebc30c13080887883102e25f7bbc022ab4cdd24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-15T15:57:56Z","title_canon_sha256":"5ebd1f72b7b4c71e96da13a478be630adf9872859445587bb4a2d950ab6d6c8f"},"schema_version":"1.0","source":{"id":"0807.2404","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.2404","created_at":"2026-07-04T17:11:49Z"},{"alias_kind":"arxiv_version","alias_value":"0807.2404v1","created_at":"2026-07-04T17:11:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.2404","created_at":"2026-07-04T17:11:49Z"},{"alias_kind":"pith_short_12","alias_value":"3PLXXOV3JKPR","created_at":"2026-07-04T17:11:49Z"},{"alias_kind":"pith_short_16","alias_value":"3PLXXOV3JKPRSDWW","created_at":"2026-07-04T17:11:49Z"},{"alias_kind":"pith_short_8","alias_value":"3PLXXOV3","created_at":"2026-07-04T17:11:49Z"}],"graph_snapshots":[{"event_id":"sha256:02e8d17b32456e6aa17c8a020b84f15d539adb595d80464ee7c63136e966b2e2","target":"graph","created_at":"2026-07-04T17:11:49Z","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/0807.2404/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We observed the nearby, low-density globular cluster M71 (NGC 6838) with the Chandra X-ray Observatory to study its faint X-ray populations. Five X-ray sources were found inside the cluster core radius, including the known eclipsing binary millisecond pulsar (MSP) PSR J1953+1846A. The X-ray light curve of the source coincident with this MSP shows marginal evidence for periodicity at the binary period of 4.2 h. Its hard X-ray spectrum and luminosity resemble those of other eclipsing binary MSPs in 47 Tuc, suggesting a similar shock origin of the X-ray emission. A further 24 X-ray sources were f","authors_text":"C. O. Heinke, H. N. Cohn, I. H. Stairs, J. E. Grindlay, J. E. Maxwell, J. W. T. Hessels, K. Ghosh, M. C. Weisskopf, P. D. Edmonds, P. M. Lugger, R. F. Elsner, R. H. H. Huang, S. Bogdanov, S. M. Ransom, W. Becker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-15T15:57:56Z","title":"Chandra X-Ray Observatory Observations of the Globular Cluster M71"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.2404","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":"sha256:43e268c2a692da01c3bcc01b4ab2825bbb47301a345952fc091d7705f03cd9ab","target":"record","created_at":"2026-07-04T17:11:49Z","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":"151cea93ccd48cf7033046e96ebc30c13080887883102e25f7bbc022ab4cdd24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-15T15:57:56Z","title_canon_sha256":"5ebd1f72b7b4c71e96da13a478be630adf9872859445587bb4a2d950ab6d6c8f"},"schema_version":"1.0","source":{"id":"0807.2404","kind":"arxiv","version":1}},"canonical_sha256":"dbd77bbabb4a9f190ed64ef5f8794fba411e98f2e0ad6f6a7016f9bd41f37c37","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dbd77bbabb4a9f190ed64ef5f8794fba411e98f2e0ad6f6a7016f9bd41f37c37","first_computed_at":"2026-07-04T17:11:49.101845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:11:49.101845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6p7Kzx0JvuIJH3n/of35a3BgIaqw2JpXxDv0wWiGFQU3Y8XlUrisB+yuMNZPSfV5hUudDhC27xBIu1/bAIb5BQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:11:49.102215Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.2404","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43e268c2a692da01c3bcc01b4ab2825bbb47301a345952fc091d7705f03cd9ab","sha256:02e8d17b32456e6aa17c8a020b84f15d539adb595d80464ee7c63136e966b2e2"],"state_sha256":"431aef86fca27a9ca40c098735d84b8f1130c83fce36c96c878d6b0fc87e35f9"}