{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:AOF43RL5TY6MH4ZXSHVYBLX4E5","short_pith_number":"pith:AOF43RL5","canonical_record":{"source":{"id":"1612.03821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T18:05:55Z","cross_cats_sorted":[],"title_canon_sha256":"b07d54361a292d35efab60f0cdac2cba886830f13d2461f1357bf1769bb6aa66","abstract_canon_sha256":"d1d93660def76cb42b2073575972a603bc55e0ccf6fec65707771e549b5480cf"},"schema_version":"1.0"},"canonical_sha256":"038bcdc57d9e3cc3f33791eb80aefc277b54025fbaaedc657e2bb76965adb864","source":{"kind":"arxiv","id":"1612.03821","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03821","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03821v1","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03821","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"AOF43RL5TY6M","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"AOF43RL5TY6MH4ZX","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"AOF43RL5","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:AOF43RL5TY6MH4ZXSHVYBLX4E5","target":"record","payload":{"canonical_record":{"source":{"id":"1612.03821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T18:05:55Z","cross_cats_sorted":[],"title_canon_sha256":"b07d54361a292d35efab60f0cdac2cba886830f13d2461f1357bf1769bb6aa66","abstract_canon_sha256":"d1d93660def76cb42b2073575972a603bc55e0ccf6fec65707771e549b5480cf"},"schema_version":"1.0"},"canonical_sha256":"038bcdc57d9e3cc3f33791eb80aefc277b54025fbaaedc657e2bb76965adb864","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:41.573624Z","signature_b64":"no7C7A5N2BzcYzSnGrlHYeszPB5h9ogX3x8CRhBpl5JgCDlR+ygBHcyibEjRp8O/kdhc1tlZ+6kjvx4t97soCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"038bcdc57d9e3cc3f33791eb80aefc277b54025fbaaedc657e2bb76965adb864","last_reissued_at":"2026-05-18T00:51:41.573027Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:41.573027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.03821","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":"2026-05-18T00:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9yL+hkX9WIeyoGGNYTGiA1tsi9e4l0SqJumtn6tQ/jAAkuconkqeEOYYNuD17SCfj3MClqJNQa7xbwp3YHHYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T09:04:48.609772Z"},"content_sha256":"67b19c570346459a650aeb502824ad80b2425511a6073e2c8e94591de0202037","schema_version":"1.0","event_id":"sha256:67b19c570346459a650aeb502824ad80b2425511a6073e2c8e94591de0202037"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:AOF43RL5TY6MH4ZXSHVYBLX4E5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Population mixtures and searches of lensed and extended quasars across photometric surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adriano Agnello, Peter Williams, Tommaso Treu","submitted_at":"2016-12-12T18:05:55Z","abstract_excerpt":"Wide-field photometric surveys enable searches of rare yet interesting objects, such as strongly lensed quasars or quasars with a bright host galaxy. Past searches for lensed quasars based on their optical and near infrared properties have relied on photometric cuts and spectroscopic pre-selection (as in the Sloan Quasar Lens Search), or neural networks applied to photometric samples. These methods rely on cuts in morphology and colours, with the risk of losing many interesting objects due to scatter in their population properties, restrictive training sets, systematic uncertainties in catalog"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03821","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":""},"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":"2026-05-18T00:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sw26uzgP0SZJA9wwnuJMjygtHWYVfQwtbYje2V7L7qpLMh8gtqObKSDxHTLN1rrgFvX/ASS2kc0iHxfx0Wa4Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T09:04:48.610326Z"},"content_sha256":"de1a8fa84db843b0f623c85de95f52f90fce47540cae9b2108bcce9b874bbeba","schema_version":"1.0","event_id":"sha256:de1a8fa84db843b0f623c85de95f52f90fce47540cae9b2108bcce9b874bbeba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/bundle.json","state_url":"https://pith.science/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/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":"2026-06-07T09:04:48Z","links":{"resolver":"https://pith.science/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5","bundle":"https://pith.science/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/bundle.json","state":"https://pith.science/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AOF43RL5TY6MH4ZXSHVYBLX4E5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:AOF43RL5TY6MH4ZXSHVYBLX4E5","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":"d1d93660def76cb42b2073575972a603bc55e0ccf6fec65707771e549b5480cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T18:05:55Z","title_canon_sha256":"b07d54361a292d35efab60f0cdac2cba886830f13d2461f1357bf1769bb6aa66"},"schema_version":"1.0","source":{"id":"1612.03821","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03821","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03821v1","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03821","created_at":"2026-05-18T00:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"AOF43RL5TY6M","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"AOF43RL5TY6MH4ZX","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"AOF43RL5","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:de1a8fa84db843b0f623c85de95f52f90fce47540cae9b2108bcce9b874bbeba","target":"graph","created_at":"2026-05-18T00:51:41Z","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":"Wide-field photometric surveys enable searches of rare yet interesting objects, such as strongly lensed quasars or quasars with a bright host galaxy. Past searches for lensed quasars based on their optical and near infrared properties have relied on photometric cuts and spectroscopic pre-selection (as in the Sloan Quasar Lens Search), or neural networks applied to photometric samples. These methods rely on cuts in morphology and colours, with the risk of losing many interesting objects due to scatter in their population properties, restrictive training sets, systematic uncertainties in catalog","authors_text":"Adriano Agnello, Peter Williams, Tommaso Treu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T18:05:55Z","title":"Population mixtures and searches of lensed and extended quasars across photometric surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03821","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":"sha256:67b19c570346459a650aeb502824ad80b2425511a6073e2c8e94591de0202037","target":"record","created_at":"2026-05-18T00:51:41Z","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":"d1d93660def76cb42b2073575972a603bc55e0ccf6fec65707771e549b5480cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-12T18:05:55Z","title_canon_sha256":"b07d54361a292d35efab60f0cdac2cba886830f13d2461f1357bf1769bb6aa66"},"schema_version":"1.0","source":{"id":"1612.03821","kind":"arxiv","version":1}},"canonical_sha256":"038bcdc57d9e3cc3f33791eb80aefc277b54025fbaaedc657e2bb76965adb864","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"038bcdc57d9e3cc3f33791eb80aefc277b54025fbaaedc657e2bb76965adb864","first_computed_at":"2026-05-18T00:51:41.573027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:41.573027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"no7C7A5N2BzcYzSnGrlHYeszPB5h9ogX3x8CRhBpl5JgCDlR+ygBHcyibEjRp8O/kdhc1tlZ+6kjvx4t97soCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:41.573624Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.03821","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67b19c570346459a650aeb502824ad80b2425511a6073e2c8e94591de0202037","sha256:de1a8fa84db843b0f623c85de95f52f90fce47540cae9b2108bcce9b874bbeba"],"state_sha256":"2e762b4c4c37415675024d5f822ea2c7e26e4a9d2a05d891f4c431b380c6f8a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C7F0+OEMSpBEVnKr0+T0tYVOpKJ/KnBFSz++k7+fWRzU8lJnhTxi9z2PO8Zx6EanaOlHWXXDHwjEHonfOBlcCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T09:04:48.613230Z","bundle_sha256":"1228e3d481647a7f4853edc39a0bc3b479753a6c7df2fc96160ca57622dc7474"}}