{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:CIXN32CJVDZQMJBV7YG56XHN7A","short_pith_number":"pith:CIXN32CJ","canonical_record":{"source":{"id":"0810.0781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-06T14:40:19Z","cross_cats_sorted":[],"title_canon_sha256":"5e7e88fd1d0f5ff612a940635ec0ca314dde9fd66c8b2b6cffd2dbfe96b367e1","abstract_canon_sha256":"ba452d0bbdd6933145608b7c3e5f978c404c04df6aac4c6bdb8168d43411561a"},"schema_version":"1.0"},"canonical_sha256":"122edde849a8f3062435fe0ddf5cedf83bddd7b401c5f0fb0078466e579761d1","source":{"kind":"arxiv","id":"0810.0781","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.0781","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"arxiv_version","alias_value":"0810.0781v1","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.0781","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_12","alias_value":"CIXN32CJVDZQ","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_16","alias_value":"CIXN32CJVDZQMJBV","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_8","alias_value":"CIXN32CJ","created_at":"2026-07-04T15:14:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:CIXN32CJVDZQMJBV7YG56XHN7A","target":"record","payload":{"canonical_record":{"source":{"id":"0810.0781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-06T14:40:19Z","cross_cats_sorted":[],"title_canon_sha256":"5e7e88fd1d0f5ff612a940635ec0ca314dde9fd66c8b2b6cffd2dbfe96b367e1","abstract_canon_sha256":"ba452d0bbdd6933145608b7c3e5f978c404c04df6aac4c6bdb8168d43411561a"},"schema_version":"1.0"},"canonical_sha256":"122edde849a8f3062435fe0ddf5cedf83bddd7b401c5f0fb0078466e579761d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:14:53.098039Z","signature_b64":"yVDvSwZgUhELFEGdeVRgb6v5vd+P4b7b1G3atxiitfeLPAaoU1L5JnmqT6vHtbK574b6C6lsQ4tmqVbDJYf0CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"122edde849a8f3062435fe0ddf5cedf83bddd7b401c5f0fb0078466e579761d1","last_reissued_at":"2026-07-04T15:14:53.097676Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:14:53.097676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.0781","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":"2026-07-04T15:14:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T+JgXoi+8GJuZ+sfP75Wdupp++XmWlPESgGLWH10fvmxkPg+QuPX1rvd7QZWgb8TE+zgJpvUhxOMS2zQSUxfAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:09:24.039261Z"},"content_sha256":"55128ffc726b7150d39300b79338eacd5a87a25a9e4fcb16bcf16c1c4f270269","schema_version":"1.0","event_id":"sha256:55128ffc726b7150d39300b79338eacd5a87a25a9e4fcb16bcf16c1c4f270269"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:CIXN32CJVDZQMJBV7YG56XHN7A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cluster detection in weak lensing surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F. Feroz (Cambridge), M.P. Hobson (Cambridge), P.J. Marshall (UC Santa Barbara)","submitted_at":"2008-10-06T14:40:19Z","abstract_excerpt":"We present an efficient and robust approach for extracting clusters of galaxies from weak lensing survey data and measuring their properties. We use simple, physically-motivated cluster models appropriate for such sparse, noisy data, and incorporate our knowledge of the cluster mass function to optimise the detection of low-mass objects. Despite the method's non-linear nature, we are able to search at a rate of approximately half a square degree per hour on a single processor, making this technique a viable candidate for future wide-field surveys. We quantify, for two simulated data-sets, the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.0781","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/0810.0781/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":"2026-07-04T15:14:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kYw8Zk4vWG+BCP5qHM+5yZrIuzI2CBADl3HYOJZ+ZnSzUYl/IldwrBxdZpyfeJh/0M0v7C7Gk8J12I42ixpRBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:09:24.039763Z"},"content_sha256":"d86b47f261c1b7689eeefc7be0d0385ea2ddb01be3f68af5966a637c55182c9e","schema_version":"1.0","event_id":"sha256:d86b47f261c1b7689eeefc7be0d0385ea2ddb01be3f68af5966a637c55182c9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CIXN32CJVDZQMJBV7YG56XHN7A/bundle.json","state_url":"https://pith.science/pith/CIXN32CJVDZQMJBV7YG56XHN7A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CIXN32CJVDZQMJBV7YG56XHN7A/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":"2026-08-04T21:09:24Z","links":{"resolver":"https://pith.science/pith/CIXN32CJVDZQMJBV7YG56XHN7A","bundle":"https://pith.science/pith/CIXN32CJVDZQMJBV7YG56XHN7A/bundle.json","state":"https://pith.science/pith/CIXN32CJVDZQMJBV7YG56XHN7A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CIXN32CJVDZQMJBV7YG56XHN7A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:CIXN32CJVDZQMJBV7YG56XHN7A","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":"ba452d0bbdd6933145608b7c3e5f978c404c04df6aac4c6bdb8168d43411561a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-06T14:40:19Z","title_canon_sha256":"5e7e88fd1d0f5ff612a940635ec0ca314dde9fd66c8b2b6cffd2dbfe96b367e1"},"schema_version":"1.0","source":{"id":"0810.0781","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.0781","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"arxiv_version","alias_value":"0810.0781v1","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.0781","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_12","alias_value":"CIXN32CJVDZQ","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_16","alias_value":"CIXN32CJVDZQMJBV","created_at":"2026-07-04T15:14:53Z"},{"alias_kind":"pith_short_8","alias_value":"CIXN32CJ","created_at":"2026-07-04T15:14:53Z"}],"graph_snapshots":[{"event_id":"sha256:d86b47f261c1b7689eeefc7be0d0385ea2ddb01be3f68af5966a637c55182c9e","target":"graph","created_at":"2026-07-04T15:14:53Z","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/0810.0781/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an efficient and robust approach for extracting clusters of galaxies from weak lensing survey data and measuring their properties. We use simple, physically-motivated cluster models appropriate for such sparse, noisy data, and incorporate our knowledge of the cluster mass function to optimise the detection of low-mass objects. Despite the method's non-linear nature, we are able to search at a rate of approximately half a square degree per hour on a single processor, making this technique a viable candidate for future wide-field surveys. We quantify, for two simulated data-sets, the ","authors_text":"F. Feroz (Cambridge), M.P. Hobson (Cambridge), P.J. Marshall (UC Santa Barbara)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-06T14:40:19Z","title":"Cluster detection in weak lensing surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.0781","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":"sha256:55128ffc726b7150d39300b79338eacd5a87a25a9e4fcb16bcf16c1c4f270269","target":"record","created_at":"2026-07-04T15:14:53Z","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":"ba452d0bbdd6933145608b7c3e5f978c404c04df6aac4c6bdb8168d43411561a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-06T14:40:19Z","title_canon_sha256":"5e7e88fd1d0f5ff612a940635ec0ca314dde9fd66c8b2b6cffd2dbfe96b367e1"},"schema_version":"1.0","source":{"id":"0810.0781","kind":"arxiv","version":1}},"canonical_sha256":"122edde849a8f3062435fe0ddf5cedf83bddd7b401c5f0fb0078466e579761d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"122edde849a8f3062435fe0ddf5cedf83bddd7b401c5f0fb0078466e579761d1","first_computed_at":"2026-07-04T15:14:53.097676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:14:53.097676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yVDvSwZgUhELFEGdeVRgb6v5vd+P4b7b1G3atxiitfeLPAaoU1L5JnmqT6vHtbK574b6C6lsQ4tmqVbDJYf0CA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:14:53.098039Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.0781","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:55128ffc726b7150d39300b79338eacd5a87a25a9e4fcb16bcf16c1c4f270269","sha256:d86b47f261c1b7689eeefc7be0d0385ea2ddb01be3f68af5966a637c55182c9e"],"state_sha256":"3d9071f35016a0e918abf7718d88d62d9701eb9622edf5d8ab8786df3dff1aa5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TEQ+JMTJtKvR06/3a7SuvV6q2ejKOyL0K2YD+p0nVNXaZOiW95d3zQDhDj70kU6vZ+ko09Wy3iHaQ4+lUrd5BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T21:09:24.043941Z","bundle_sha256":"fdc8d2e3132b928f4ffdd134546589b5c2c18ed97b953bb3393124660d8e0f38"}}