{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:2BYJVH3NNNFDMUHYRN4OFRRNDI","short_pith_number":"pith:2BYJVH3N","canonical_record":{"source":{"id":"1209.1646","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-07T20:20:27Z","cross_cats_sorted":[],"title_canon_sha256":"398e983e067aab370b4c4f62668f2e59690edb5cbc82fd60392e40351fac244a","abstract_canon_sha256":"26374071412b9c60df724642ebd82da8909569e0cae7e9b0b84c0f6b57e8d367"},"schema_version":"1.0"},"canonical_sha256":"d0709a9f6d6b4a3650f88b78e2c62d1a033beb9ac336523770282e80b862a7f4","source":{"kind":"arxiv","id":"1209.1646","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.1646","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"arxiv_version","alias_value":"1209.1646v2","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.1646","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"pith_short_12","alias_value":"2BYJVH3NNNFD","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2BYJVH3NNNFDMUHY","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2BYJVH3N","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:2BYJVH3NNNFDMUHYRN4OFRRNDI","target":"record","payload":{"canonical_record":{"source":{"id":"1209.1646","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-07T20:20:27Z","cross_cats_sorted":[],"title_canon_sha256":"398e983e067aab370b4c4f62668f2e59690edb5cbc82fd60392e40351fac244a","abstract_canon_sha256":"26374071412b9c60df724642ebd82da8909569e0cae7e9b0b84c0f6b57e8d367"},"schema_version":"1.0"},"canonical_sha256":"d0709a9f6d6b4a3650f88b78e2c62d1a033beb9ac336523770282e80b862a7f4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:38.367091Z","signature_b64":"QusNeFTu4XG5OoEjSdBWGOHIZA2verU5lrPKCSDzWzpJZR8gf5408Hc1Xz7Anb/ddUEJOwGbjCSSZYMbJCBMAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d0709a9f6d6b4a3650f88b78e2c62d1a033beb9ac336523770282e80b862a7f4","last_reissued_at":"2026-05-18T01:54:38.366554Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:38.366554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.1646","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":"2026-05-18T01:54:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iCyfZexpoigcQJhooOEpoaqSr8EQxZq7OwjDtf3K1BZp8j0Q2blEKVTeBROZZTFG8eYs8bYO7au+1UM9p5RVCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:23:01.548565Z"},"content_sha256":"eebbe7974c15ea3b7d6ca1141850f2e1be39fa8b77409a89f886e8a17bb4551b","schema_version":"1.0","event_id":"sha256:eebbe7974c15ea3b7d6ca1141850f2e1be39fa8b77409a89f886e8a17bb4551b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:2BYJVH3NNNFDMUHYRN4OFRRNDI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Size magnification as a complement to Cosmic Shear","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alan F. Heavens, Biuse Casaponsa, Enrique Mart\\'inez-Gonzalez, Lance Miller, Rita Bel\\'en Barreiro, Tom D. Kitching","submitted_at":"2012-09-07T20:20:27Z","abstract_excerpt":"We investigate the extent to which cosmic size magnification may be used to com- plement cosmic shear in weak gravitational lensing surveys, with a view to obtaining high-precision estimates of cosmological parameters. Using simulated galaxy images, we find that size estimation can be an excellent complement, finding that unbiased estimation of the convergence field is possible with galaxies with angular sizes larger than the point-spread function (PSF) and signal-to-noise ratio in excess of 10. The statistical power is similar to, but not quite as good as, cosmic shear, and it is subject to d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.1646","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":"2026-05-18T01:54:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PucbRpiFkBdFUg5ARWAqpy1xv+kgjydlBKF7DPiSIQrCIv0hCC8Ydh9UIMwpPXh4POTeLHOCJDeJGUOdysEtAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:23:01.548914Z"},"content_sha256":"3e3583a50c31a1046407b2ffb27876dae0cb97e0d41d3b2f9109438f596cbbc4","schema_version":"1.0","event_id":"sha256:3e3583a50c31a1046407b2ffb27876dae0cb97e0d41d3b2f9109438f596cbbc4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/bundle.json","state_url":"https://pith.science/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/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":"2026-05-30T09:23:01Z","links":{"resolver":"https://pith.science/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI","bundle":"https://pith.science/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/bundle.json","state":"https://pith.science/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2BYJVH3NNNFDMUHYRN4OFRRNDI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2BYJVH3NNNFDMUHYRN4OFRRNDI","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":"26374071412b9c60df724642ebd82da8909569e0cae7e9b0b84c0f6b57e8d367","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-07T20:20:27Z","title_canon_sha256":"398e983e067aab370b4c4f62668f2e59690edb5cbc82fd60392e40351fac244a"},"schema_version":"1.0","source":{"id":"1209.1646","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.1646","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"arxiv_version","alias_value":"1209.1646v2","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.1646","created_at":"2026-05-18T01:54:38Z"},{"alias_kind":"pith_short_12","alias_value":"2BYJVH3NNNFD","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2BYJVH3NNNFDMUHY","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2BYJVH3N","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:3e3583a50c31a1046407b2ffb27876dae0cb97e0d41d3b2f9109438f596cbbc4","target":"graph","created_at":"2026-05-18T01:54:38Z","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 investigate the extent to which cosmic size magnification may be used to com- plement cosmic shear in weak gravitational lensing surveys, with a view to obtaining high-precision estimates of cosmological parameters. Using simulated galaxy images, we find that size estimation can be an excellent complement, finding that unbiased estimation of the convergence field is possible with galaxies with angular sizes larger than the point-spread function (PSF) and signal-to-noise ratio in excess of 10. The statistical power is similar to, but not quite as good as, cosmic shear, and it is subject to d","authors_text":"Alan F. Heavens, Biuse Casaponsa, Enrique Mart\\'inez-Gonzalez, Lance Miller, Rita Bel\\'en Barreiro, Tom D. Kitching","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-07T20:20:27Z","title":"Size magnification as a complement to Cosmic Shear"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.1646","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:eebbe7974c15ea3b7d6ca1141850f2e1be39fa8b77409a89f886e8a17bb4551b","target":"record","created_at":"2026-05-18T01:54:38Z","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":"26374071412b9c60df724642ebd82da8909569e0cae7e9b0b84c0f6b57e8d367","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-07T20:20:27Z","title_canon_sha256":"398e983e067aab370b4c4f62668f2e59690edb5cbc82fd60392e40351fac244a"},"schema_version":"1.0","source":{"id":"1209.1646","kind":"arxiv","version":2}},"canonical_sha256":"d0709a9f6d6b4a3650f88b78e2c62d1a033beb9ac336523770282e80b862a7f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0709a9f6d6b4a3650f88b78e2c62d1a033beb9ac336523770282e80b862a7f4","first_computed_at":"2026-05-18T01:54:38.366554Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:38.366554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QusNeFTu4XG5OoEjSdBWGOHIZA2verU5lrPKCSDzWzpJZR8gf5408Hc1Xz7Anb/ddUEJOwGbjCSSZYMbJCBMAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:38.367091Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.1646","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eebbe7974c15ea3b7d6ca1141850f2e1be39fa8b77409a89f886e8a17bb4551b","sha256:3e3583a50c31a1046407b2ffb27876dae0cb97e0d41d3b2f9109438f596cbbc4"],"state_sha256":"12b4d94b92800a596895784e21d49aeba51cf3ceed6107d60264d87a1a178e29"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KpeptgKe4ZHBvE3iJz9URF+OhmFEnvHjgdt57nteQjNQPpzvW3Io5bsKRt2c6O1lQP1rR8CNdKWxbD1lNDuQDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:23:01.552570Z","bundle_sha256":"fb5d73170db47d6a54d862df3ffd3e0a31147985fdb1e00e61b52e499c4ec64d"}}