{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:URIIJYMNPAVMNW2W5IR7SN3424","short_pith_number":"pith:URIIJYMN","canonical_record":{"source":{"id":"1701.04913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-01-18T01:08:20Z","cross_cats_sorted":["cs.IT","math.IT","quant-ph"],"title_canon_sha256":"24b75deb5f3ae4c40328f32948b952589e6d9f940992ea4fe82435d584097d24","abstract_canon_sha256":"b4578b16509665c73a5cd0ebdd96cde4b0dbc1bc8eb3920a6685a23005267adb"},"schema_version":"1.0"},"canonical_sha256":"a45084e18d782ac6db56ea23f9377cd708637cbd0324ee6c773310ce39c92f35","source":{"kind":"arxiv","id":"1701.04913","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.04913","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1701.04913v1","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.04913","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"URIIJYMNPAVM","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"URIIJYMNPAVMNW2W","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"URIIJYMN","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:URIIJYMNPAVMNW2W5IR7SN3424","target":"record","payload":{"canonical_record":{"source":{"id":"1701.04913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-01-18T01:08:20Z","cross_cats_sorted":["cs.IT","math.IT","quant-ph"],"title_canon_sha256":"24b75deb5f3ae4c40328f32948b952589e6d9f940992ea4fe82435d584097d24","abstract_canon_sha256":"b4578b16509665c73a5cd0ebdd96cde4b0dbc1bc8eb3920a6685a23005267adb"},"schema_version":"1.0"},"canonical_sha256":"a45084e18d782ac6db56ea23f9377cd708637cbd0324ee6c773310ce39c92f35","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:33.565629Z","signature_b64":"5//UA0auTqWWhA3co3YUKOA82vxqbOGrHP7okKljNhqAw5AfrgK+algTlp8z9oTbDo27IE8fC6IHfqanWfvoBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a45084e18d782ac6db56ea23f9377cd708637cbd0324ee6c773310ce39c92f35","last_reissued_at":"2026-05-18T00:52:33.565200Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:33.565200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.04913","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":"2026-05-18T00:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2zqBKr+jEvOXds6gFRbeVmuYyuPvOuX38Dw3vcjExsXtNpTao+zWTk7RgtS1zb2cwtITYDsgGbh5cRJVZT/KAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T12:19:26.769332Z"},"content_sha256":"770901643971fcaaa50364119ab492c50b71f1f0251b241b166ce56853f2b17e","schema_version":"1.0","event_id":"sha256:770901643971fcaaa50364119ab492c50b71f1f0251b241b166ce56853f2b17e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:URIIJYMNPAVMNW2W5IR7SN3424","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fundamental limit of resolving two point sources limited by an arbitrary point spread function","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT","quant-ph"],"primary_cat":"physics.optics","authors_text":"Amit Ashok, Ronan Kerviche, Saikat Guha","submitted_at":"2017-01-18T01:08:20Z","abstract_excerpt":"Estimating the angular separation between two incoherently radiating monochromatic point sources is a canonical toy problem to quantify spatial resolution in imaging. In recent work, Tsang {\\em et al.} showed, using a Fisher Information analysis, that Rayleigh's resolution limit is just an artifact of the conventional wisdom of intensity measurement in the image plane. They showed that the optimal sensitivity of estimating the angle is only a function of the total photons collected during the camera's integration time but entirely independent of the angular separation itself no matter how smal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.04913","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":"2026-05-18T00:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r/3LxXOf+JT4da22lL8Ps5ZzPrN4gIdryqYp75ZRFDBBx2WMivgZY/ltNqug7/geI448t8LtTwaKtT0Tlmo0CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T12:19:26.769684Z"},"content_sha256":"7a8c3f46e2bafa28b6b0266e1a1c5352194cb715bb8f50d2743fc6937fcc9be4","schema_version":"1.0","event_id":"sha256:7a8c3f46e2bafa28b6b0266e1a1c5352194cb715bb8f50d2743fc6937fcc9be4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URIIJYMNPAVMNW2W5IR7SN3424/bundle.json","state_url":"https://pith.science/pith/URIIJYMNPAVMNW2W5IR7SN3424/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URIIJYMNPAVMNW2W5IR7SN3424/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":"2026-06-24T12:19:26Z","links":{"resolver":"https://pith.science/pith/URIIJYMNPAVMNW2W5IR7SN3424","bundle":"https://pith.science/pith/URIIJYMNPAVMNW2W5IR7SN3424/bundle.json","state":"https://pith.science/pith/URIIJYMNPAVMNW2W5IR7SN3424/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URIIJYMNPAVMNW2W5IR7SN3424/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:URIIJYMNPAVMNW2W5IR7SN3424","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":"b4578b16509665c73a5cd0ebdd96cde4b0dbc1bc8eb3920a6685a23005267adb","cross_cats_sorted":["cs.IT","math.IT","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-01-18T01:08:20Z","title_canon_sha256":"24b75deb5f3ae4c40328f32948b952589e6d9f940992ea4fe82435d584097d24"},"schema_version":"1.0","source":{"id":"1701.04913","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.04913","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1701.04913v1","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.04913","created_at":"2026-05-18T00:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"URIIJYMNPAVM","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"URIIJYMNPAVMNW2W","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"URIIJYMN","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:7a8c3f46e2bafa28b6b0266e1a1c5352194cb715bb8f50d2743fc6937fcc9be4","target":"graph","created_at":"2026-05-18T00:52:33Z","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":"Estimating the angular separation between two incoherently radiating monochromatic point sources is a canonical toy problem to quantify spatial resolution in imaging. In recent work, Tsang {\\em et al.} showed, using a Fisher Information analysis, that Rayleigh's resolution limit is just an artifact of the conventional wisdom of intensity measurement in the image plane. They showed that the optimal sensitivity of estimating the angle is only a function of the total photons collected during the camera's integration time but entirely independent of the angular separation itself no matter how smal","authors_text":"Amit Ashok, Ronan Kerviche, Saikat Guha","cross_cats":["cs.IT","math.IT","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-01-18T01:08:20Z","title":"Fundamental limit of resolving two point sources limited by an arbitrary point spread function"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.04913","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":"sha256:770901643971fcaaa50364119ab492c50b71f1f0251b241b166ce56853f2b17e","target":"record","created_at":"2026-05-18T00:52:33Z","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":"b4578b16509665c73a5cd0ebdd96cde4b0dbc1bc8eb3920a6685a23005267adb","cross_cats_sorted":["cs.IT","math.IT","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-01-18T01:08:20Z","title_canon_sha256":"24b75deb5f3ae4c40328f32948b952589e6d9f940992ea4fe82435d584097d24"},"schema_version":"1.0","source":{"id":"1701.04913","kind":"arxiv","version":1}},"canonical_sha256":"a45084e18d782ac6db56ea23f9377cd708637cbd0324ee6c773310ce39c92f35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a45084e18d782ac6db56ea23f9377cd708637cbd0324ee6c773310ce39c92f35","first_computed_at":"2026-05-18T00:52:33.565200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:33.565200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5//UA0auTqWWhA3co3YUKOA82vxqbOGrHP7okKljNhqAw5AfrgK+algTlp8z9oTbDo27IE8fC6IHfqanWfvoBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:33.565629Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.04913","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:770901643971fcaaa50364119ab492c50b71f1f0251b241b166ce56853f2b17e","sha256:7a8c3f46e2bafa28b6b0266e1a1c5352194cb715bb8f50d2743fc6937fcc9be4"],"state_sha256":"104c069b7c57d627ed5c05014b4bc8ab4c3725518235ea6742f2f4ab30ec7123"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i1ysZh8TVERLnziHcJJE/z5aCFGvvLje9N9aHx/BivIWRKcJ/MEqlYrk7ovwXJjH+YjBuCnlIqVXtVNi+DbqDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T12:19:26.771735Z","bundle_sha256":"ff689bccd6e40b93fbb05aa538785368c88ca5e1e3d8c31a1bfaade6ec6c4bcf"}}