{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:FPYZDGBKTZY435HNE63LY5UP55","short_pith_number":"pith:FPYZDGBK","canonical_record":{"source":{"id":"2108.08036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-08-18T08:40:34Z","cross_cats_sorted":[],"title_canon_sha256":"9d506315bb1bce352a70c31e850161fe674ac0b0ce7205869f3e3f352972bea3","abstract_canon_sha256":"23c9c608cee3aadb211a5a9abb6764ed1ff404fa216d063f8eee28f7874cc9f2"},"schema_version":"1.0"},"canonical_sha256":"2bf191982a9e71cdf4ed27b6bc768fef6d2d6493998be6a38b78729ba5329186","source":{"kind":"arxiv","id":"2108.08036","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08036","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08036v1","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08036","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_12","alias_value":"FPYZDGBKTZY4","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_16","alias_value":"FPYZDGBKTZY435HN","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_8","alias_value":"FPYZDGBK","created_at":"2026-07-05T03:17:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:FPYZDGBKTZY435HNE63LY5UP55","target":"record","payload":{"canonical_record":{"source":{"id":"2108.08036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-08-18T08:40:34Z","cross_cats_sorted":[],"title_canon_sha256":"9d506315bb1bce352a70c31e850161fe674ac0b0ce7205869f3e3f352972bea3","abstract_canon_sha256":"23c9c608cee3aadb211a5a9abb6764ed1ff404fa216d063f8eee28f7874cc9f2"},"schema_version":"1.0"},"canonical_sha256":"2bf191982a9e71cdf4ed27b6bc768fef6d2d6493998be6a38b78729ba5329186","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:17:57.920017Z","signature_b64":"TXDxzbp83A4aB31EKpmaaNsE3GGzX6aQdUbX9XkjXsxnT6nRIc3WU48pY5wDDuiG6OBG/JUhA2SXDMBuYFAnAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2bf191982a9e71cdf4ed27b6bc768fef6d2d6493998be6a38b78729ba5329186","last_reissued_at":"2026-07-05T03:17:57.919564Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:17:57.919564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.08036","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":"2026-07-05T03:17:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/UYT+7s+6PXSP/CB++DM+zWL1Hl+sro+SxDJJ93eTTMtIKf3F56uxiz1yIpfcBhUjVUSHDhyT44a6WId7B8UAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:55:00.409233Z"},"content_sha256":"659918604b3f068e525886fa8eccc89ae314493ebbb41955c5d603537b00a388","schema_version":"1.0","event_id":"sha256:659918604b3f068e525886fa8eccc89ae314493ebbb41955c5d603537b00a388"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:FPYZDGBKTZY435HNE63LY5UP55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Methods for Estimating Peculiar Velocity Correlation Functions Using Volume Weighting","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hume A. Feldman, Richard Watkins, Sarah Peery, Yuyu Wang","submitted_at":"2021-08-18T08:40:34Z","abstract_excerpt":"We present an improved method for calculating the parallel and perpendicular velocity correlation functions directly from peculiar velocity surveys using weighted maximum-likelihood estimators. A central feature of the new method is the use of position-dependent weighting scheme that reduces the influence of nearby galaxies, which are typically overrepresented relative to the more distant galaxies in most surveys. We demonstrate that the correlation functions calculated this way are less susceptible to biases due to our particular location in the Universe, and thus are more easily comparable t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08036","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/2108.08036/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":"2026-07-05T03:17:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QYOzm4ZyUD2q8tWZ/zke7lWOH2KnwE7240zxQ3Ob9iT2auYnBtWAOMKNDe3WJbOD2OusxyJmD0rskr7wn+9UBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:55:00.409765Z"},"content_sha256":"686ec6879a4e629983819fd5a692739fc9c0beabf35ea47f92d0ad0b5fa51a10","schema_version":"1.0","event_id":"sha256:686ec6879a4e629983819fd5a692739fc9c0beabf35ea47f92d0ad0b5fa51a10"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FPYZDGBKTZY435HNE63LY5UP55/bundle.json","state_url":"https://pith.science/pith/FPYZDGBKTZY435HNE63LY5UP55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FPYZDGBKTZY435HNE63LY5UP55/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":"2026-08-15T14:55:00Z","links":{"resolver":"https://pith.science/pith/FPYZDGBKTZY435HNE63LY5UP55","bundle":"https://pith.science/pith/FPYZDGBKTZY435HNE63LY5UP55/bundle.json","state":"https://pith.science/pith/FPYZDGBKTZY435HNE63LY5UP55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FPYZDGBKTZY435HNE63LY5UP55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:FPYZDGBKTZY435HNE63LY5UP55","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":"23c9c608cee3aadb211a5a9abb6764ed1ff404fa216d063f8eee28f7874cc9f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-08-18T08:40:34Z","title_canon_sha256":"9d506315bb1bce352a70c31e850161fe674ac0b0ce7205869f3e3f352972bea3"},"schema_version":"1.0","source":{"id":"2108.08036","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08036","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08036v1","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08036","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_12","alias_value":"FPYZDGBKTZY4","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_16","alias_value":"FPYZDGBKTZY435HN","created_at":"2026-07-05T03:17:57Z"},{"alias_kind":"pith_short_8","alias_value":"FPYZDGBK","created_at":"2026-07-05T03:17:57Z"}],"graph_snapshots":[{"event_id":"sha256:686ec6879a4e629983819fd5a692739fc9c0beabf35ea47f92d0ad0b5fa51a10","target":"graph","created_at":"2026-07-05T03:17:57Z","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/2108.08036/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an improved method for calculating the parallel and perpendicular velocity correlation functions directly from peculiar velocity surveys using weighted maximum-likelihood estimators. A central feature of the new method is the use of position-dependent weighting scheme that reduces the influence of nearby galaxies, which are typically overrepresented relative to the more distant galaxies in most surveys. We demonstrate that the correlation functions calculated this way are less susceptible to biases due to our particular location in the Universe, and thus are more easily comparable t","authors_text":"Hume A. Feldman, Richard Watkins, Sarah Peery, Yuyu Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-08-18T08:40:34Z","title":"Improved Methods for Estimating Peculiar Velocity Correlation Functions Using Volume Weighting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08036","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":"sha256:659918604b3f068e525886fa8eccc89ae314493ebbb41955c5d603537b00a388","target":"record","created_at":"2026-07-05T03:17:57Z","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":"23c9c608cee3aadb211a5a9abb6764ed1ff404fa216d063f8eee28f7874cc9f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-08-18T08:40:34Z","title_canon_sha256":"9d506315bb1bce352a70c31e850161fe674ac0b0ce7205869f3e3f352972bea3"},"schema_version":"1.0","source":{"id":"2108.08036","kind":"arxiv","version":1}},"canonical_sha256":"2bf191982a9e71cdf4ed27b6bc768fef6d2d6493998be6a38b78729ba5329186","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2bf191982a9e71cdf4ed27b6bc768fef6d2d6493998be6a38b78729ba5329186","first_computed_at":"2026-07-05T03:17:57.919564Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:17:57.919564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TXDxzbp83A4aB31EKpmaaNsE3GGzX6aQdUbX9XkjXsxnT6nRIc3WU48pY5wDDuiG6OBG/JUhA2SXDMBuYFAnAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:17:57.920017Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.08036","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:659918604b3f068e525886fa8eccc89ae314493ebbb41955c5d603537b00a388","sha256:686ec6879a4e629983819fd5a692739fc9c0beabf35ea47f92d0ad0b5fa51a10"],"state_sha256":"6bff039ae6c8ea15d4cb02298b827f3df9b049adb27b74bbb0d5748e91de8cc8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HNpkUdRtgnHWyOSFcbrGSkeHaGycn9ocKr47gZSo5R5fO+jZyDSsUUxSesy+2Q06bUW/Cz0cv3CCT0LZDc9mCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T14:55:00.412843Z","bundle_sha256":"f1484c8c30c8174ea4853085af500590801871328a2a5905798d25d4cfd1d3fd"}}