{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:Y2LCU6IAQY32MAXPC4JZ2FYJOR","short_pith_number":"pith:Y2LCU6IA","canonical_record":{"source":{"id":"0906.2237","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-06-12T01:54:40Z","cross_cats_sorted":[],"title_canon_sha256":"7d11733ba97709147a569b5272308f47a003472b77b26e46351be0013592f28b","abstract_canon_sha256":"e299b4be03304479411174898af6a8fd674a331e01ac58d4c7063a12f675b983"},"schema_version":"1.0"},"canonical_sha256":"c6962a79008637a602ef17139d17097464213123fbe3dad150bd10e6bc171962","source":{"kind":"arxiv","id":"0906.2237","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2237","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2237v2","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2237","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"pith_short_12","alias_value":"Y2LCU6IAQY32","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Y2LCU6IAQY32MAXP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Y2LCU6IA","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:Y2LCU6IAQY32MAXPC4JZ2FYJOR","target":"record","payload":{"canonical_record":{"source":{"id":"0906.2237","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-06-12T01:54:40Z","cross_cats_sorted":[],"title_canon_sha256":"7d11733ba97709147a569b5272308f47a003472b77b26e46351be0013592f28b","abstract_canon_sha256":"e299b4be03304479411174898af6a8fd674a331e01ac58d4c7063a12f675b983"},"schema_version":"1.0"},"canonical_sha256":"c6962a79008637a602ef17139d17097464213123fbe3dad150bd10e6bc171962","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:28.635187Z","signature_b64":"gP8uxeqVoNUCwOW3Rv4e8cMPsdyI1dd7Lr3G0c8QnR6s3NDqguKwX/dFSZtbW7YaZpQ+SIZMCEb+a1Dwll4lCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6962a79008637a602ef17139d17097464213123fbe3dad150bd10e6bc171962","last_reissued_at":"2026-05-18T04:00:28.634694Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:28.634694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.2237","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pNSsejuLBCW61EUeMtGMokurF1gV3kmDHaOGM65Q4o8yEytbYK23p3GibYfLhUui3OffnvQnrt8SLShfQt7gCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T19:12:16.744890Z"},"content_sha256":"4b17596aa2475d1bb5abb29bd303084a5d0c75309a709ca73b9d2bbc7c4639f6","schema_version":"1.0","event_id":"sha256:4b17596aa2475d1bb5abb29bd303084a5d0c75309a709ca73b9d2bbc7c4639f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:Y2LCU6IAQY32MAXPC4JZ2FYJOR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simulations of Wide-Field Weak Lensing Surveys I: Basic Statistics and Non-Gaussian Effects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Masahiro Takada, Masanori Sato, Naoki Yoshida, Naoshi Sugiyama, Ryuichi Takahashi, Takahiko Matsubara, Takashi Hamana","submitted_at":"2009-06-12T01:54:40Z","abstract_excerpt":"We study the lensing convergence power spectrum and its covariance for a standard LCDM cosmology. We run 400 cosmological N-body simulations and use the outputs to perform a total of 1000 independent ray-tracing simulations. We compare the simulation results with analytic model predictions. The semi-analytic model based on Smith et al.(2003) fitting formula underestimates the convergence power by ~30% at arc-minute angular scales. For the convergence power spectrum covariance, the halo model reproduces the simulation results remarkably well over a wide range of angular scales and source redshi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2237","kind":"arxiv","version":2},"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":"2026-05-18T04:00:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5NMNOao+gmafb4tmejBlgQZuTCBQJXMldWTMFPaL4yABV9qHm0LyBUmlL9F8/0R9GSOzyBxx3xT/qVOc46uxBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T19:12:16.745574Z"},"content_sha256":"610d66c10a1c5214dc6df69ef414272ece81fea1848105a7e0a87dda662ae989","schema_version":"1.0","event_id":"sha256:610d66c10a1c5214dc6df69ef414272ece81fea1848105a7e0a87dda662ae989"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/bundle.json","state_url":"https://pith.science/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/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":"2026-05-18T19:12:16Z","links":{"resolver":"https://pith.science/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR","bundle":"https://pith.science/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/bundle.json","state":"https://pith.science/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y2LCU6IAQY32MAXPC4JZ2FYJOR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:Y2LCU6IAQY32MAXPC4JZ2FYJOR","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":"e299b4be03304479411174898af6a8fd674a331e01ac58d4c7063a12f675b983","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-06-12T01:54:40Z","title_canon_sha256":"7d11733ba97709147a569b5272308f47a003472b77b26e46351be0013592f28b"},"schema_version":"1.0","source":{"id":"0906.2237","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2237","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2237v2","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2237","created_at":"2026-05-18T04:00:28Z"},{"alias_kind":"pith_short_12","alias_value":"Y2LCU6IAQY32","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Y2LCU6IAQY32MAXP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Y2LCU6IA","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:610d66c10a1c5214dc6df69ef414272ece81fea1848105a7e0a87dda662ae989","target":"graph","created_at":"2026-05-18T04:00:28Z","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 study the lensing convergence power spectrum and its covariance for a standard LCDM cosmology. We run 400 cosmological N-body simulations and use the outputs to perform a total of 1000 independent ray-tracing simulations. We compare the simulation results with analytic model predictions. The semi-analytic model based on Smith et al.(2003) fitting formula underestimates the convergence power by ~30% at arc-minute angular scales. For the convergence power spectrum covariance, the halo model reproduces the simulation results remarkably well over a wide range of angular scales and source redshi","authors_text":"Masahiro Takada, Masanori Sato, Naoki Yoshida, Naoshi Sugiyama, Ryuichi Takahashi, Takahiko Matsubara, Takashi Hamana","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-06-12T01:54:40Z","title":"Simulations of Wide-Field Weak Lensing Surveys I: Basic Statistics and Non-Gaussian Effects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2237","kind":"arxiv","version":2},"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":"sha256:4b17596aa2475d1bb5abb29bd303084a5d0c75309a709ca73b9d2bbc7c4639f6","target":"record","created_at":"2026-05-18T04:00:28Z","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":"e299b4be03304479411174898af6a8fd674a331e01ac58d4c7063a12f675b983","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-06-12T01:54:40Z","title_canon_sha256":"7d11733ba97709147a569b5272308f47a003472b77b26e46351be0013592f28b"},"schema_version":"1.0","source":{"id":"0906.2237","kind":"arxiv","version":2}},"canonical_sha256":"c6962a79008637a602ef17139d17097464213123fbe3dad150bd10e6bc171962","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6962a79008637a602ef17139d17097464213123fbe3dad150bd10e6bc171962","first_computed_at":"2026-05-18T04:00:28.634694Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:28.634694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gP8uxeqVoNUCwOW3Rv4e8cMPsdyI1dd7Lr3G0c8QnR6s3NDqguKwX/dFSZtbW7YaZpQ+SIZMCEb+a1Dwll4lCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:28.635187Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.2237","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b17596aa2475d1bb5abb29bd303084a5d0c75309a709ca73b9d2bbc7c4639f6","sha256:610d66c10a1c5214dc6df69ef414272ece81fea1848105a7e0a87dda662ae989"],"state_sha256":"67b081366aaba76c21874cdbd568fab9e77255e3120e9ab1c0eb048de398440e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wjFPEm+HB9h4FGqykNo7eLkQA1Ch0x98+ZmbK6YWQzw8t2fncDrC/d44iAmuJnTY4Tdrx70LLr9XlNMBP51VAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T19:12:16.747651Z","bundle_sha256":"58485e42ca0b4d1e1e0ce716fcc0e5975f84428581c69adb08270711cdcf6a5c"}}