{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:X7MLEQ5TZI2QF3ZNGIYXH36H73","short_pith_number":"pith:X7MLEQ5T","canonical_record":{"source":{"id":"0901.0846","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-01-07T16:00:35Z","cross_cats_sorted":[],"title_canon_sha256":"40f8fd6697d993e382cc4751d26d1d1b11aecc9315513e1a261ee4c7a6bf9d8d","abstract_canon_sha256":"762faf5899e1a771465c14e8bb36bf6bf846d3d2a30874559f8c2f7555c819ea"},"schema_version":"1.0"},"canonical_sha256":"bfd8b243b3ca3502ef2d323173efc7fece1ab77e9077eaa4c15b2d28e058e427","source":{"kind":"arxiv","id":"0901.0846","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.0846","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"0901.0846v1","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.0846","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"X7MLEQ5TZI2Q","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"X7MLEQ5TZI2QF3ZN","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"X7MLEQ5T","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:X7MLEQ5TZI2QF3ZNGIYXH36H73","target":"record","payload":{"canonical_record":{"source":{"id":"0901.0846","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-01-07T16:00:35Z","cross_cats_sorted":[],"title_canon_sha256":"40f8fd6697d993e382cc4751d26d1d1b11aecc9315513e1a261ee4c7a6bf9d8d","abstract_canon_sha256":"762faf5899e1a771465c14e8bb36bf6bf846d3d2a30874559f8c2f7555c819ea"},"schema_version":"1.0"},"canonical_sha256":"bfd8b243b3ca3502ef2d323173efc7fece1ab77e9077eaa4c15b2d28e058e427","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:03.119099Z","signature_b64":"o9i8dVpEksMvcjhqxfxgCLK6vQwPoUMqCaPR4pmKcaQdbnEg+euxS5/tILU+i/o72XVXFXjASI4Vd5jLB4PTDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfd8b243b3ca3502ef2d323173efc7fece1ab77e9077eaa4c15b2d28e058e427","last_reissued_at":"2026-05-18T02:15:03.118546Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:03.118546Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0901.0846","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":"2026-05-18T02:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ssidYKxbzWr000TbaBOOvtt/ZNuiuYY6RiTb3ZQMuAu6YsTcBefgJt//DAQxey4GgrwwztPUh9rpM4J0mTnXAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:27:48.367864Z"},"content_sha256":"4f47afa72a1dd92cd3e4431b85c83768f3726e920724a69cad1f91f78af326d2","schema_version":"1.0","event_id":"sha256:4f47afa72a1dd92cd3e4431b85c83768f3726e920724a69cad1f91f78af326d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:X7MLEQ5TZI2QF3ZNGIYXH36H73","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Metric and Optimisation Scheme for Microlens Planet Searches","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Colin Snodgrass, Keith Horne, Yianni Tsapras","submitted_at":"2009-01-07T16:00:35Z","abstract_excerpt":"OGLE III and MOA II are discovering 600-1000 Galactic Bulge microlens events each year. This stretches the resources available for intensive follow-up monitoring of the lightcurves in search of anomalies caused by planets near the lens stars. We advocate optimizing microlens planet searches by using an automatic prioritization algorithm based on the planet detection zone area probed by each new data point. This optimization scheme takes account of the telescope and detector characteristics, observing overheads, sky conditions, and the time available for observing on each night. The predicted b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.0846","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":"2026-05-18T02:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NSiBIUpflZjEl5dODOiwiAH94Z6C4JriUQTdfEANideyMRWpb0EPIXZ2XZpcFDvbC7rRs5/jdqeTKCcQst+yBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:27:48.368212Z"},"content_sha256":"85693512cf53d2047cef31f238c1c2264266510aa0c2cd7c7a81994611ff0253","schema_version":"1.0","event_id":"sha256:85693512cf53d2047cef31f238c1c2264266510aa0c2cd7c7a81994611ff0253"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/bundle.json","state_url":"https://pith.science/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/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":"2026-05-28T05:27:48Z","links":{"resolver":"https://pith.science/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73","bundle":"https://pith.science/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/bundle.json","state":"https://pith.science/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X7MLEQ5TZI2QF3ZNGIYXH36H73/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:X7MLEQ5TZI2QF3ZNGIYXH36H73","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":"762faf5899e1a771465c14e8bb36bf6bf846d3d2a30874559f8c2f7555c819ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-01-07T16:00:35Z","title_canon_sha256":"40f8fd6697d993e382cc4751d26d1d1b11aecc9315513e1a261ee4c7a6bf9d8d"},"schema_version":"1.0","source":{"id":"0901.0846","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.0846","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"0901.0846v1","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.0846","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"X7MLEQ5TZI2Q","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"X7MLEQ5TZI2QF3ZN","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"X7MLEQ5T","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:85693512cf53d2047cef31f238c1c2264266510aa0c2cd7c7a81994611ff0253","target":"graph","created_at":"2026-05-18T02:15:03Z","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":"OGLE III and MOA II are discovering 600-1000 Galactic Bulge microlens events each year. This stretches the resources available for intensive follow-up monitoring of the lightcurves in search of anomalies caused by planets near the lens stars. We advocate optimizing microlens planet searches by using an automatic prioritization algorithm based on the planet detection zone area probed by each new data point. This optimization scheme takes account of the telescope and detector characteristics, observing overheads, sky conditions, and the time available for observing on each night. The predicted b","authors_text":"Colin Snodgrass, Keith Horne, Yianni Tsapras","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-01-07T16:00:35Z","title":"A Metric and Optimisation Scheme for Microlens Planet Searches"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.0846","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":"sha256:4f47afa72a1dd92cd3e4431b85c83768f3726e920724a69cad1f91f78af326d2","target":"record","created_at":"2026-05-18T02:15:03Z","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":"762faf5899e1a771465c14e8bb36bf6bf846d3d2a30874559f8c2f7555c819ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-01-07T16:00:35Z","title_canon_sha256":"40f8fd6697d993e382cc4751d26d1d1b11aecc9315513e1a261ee4c7a6bf9d8d"},"schema_version":"1.0","source":{"id":"0901.0846","kind":"arxiv","version":1}},"canonical_sha256":"bfd8b243b3ca3502ef2d323173efc7fece1ab77e9077eaa4c15b2d28e058e427","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfd8b243b3ca3502ef2d323173efc7fece1ab77e9077eaa4c15b2d28e058e427","first_computed_at":"2026-05-18T02:15:03.118546Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:03.118546Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o9i8dVpEksMvcjhqxfxgCLK6vQwPoUMqCaPR4pmKcaQdbnEg+euxS5/tILU+i/o72XVXFXjASI4Vd5jLB4PTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:03.119099Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.0846","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f47afa72a1dd92cd3e4431b85c83768f3726e920724a69cad1f91f78af326d2","sha256:85693512cf53d2047cef31f238c1c2264266510aa0c2cd7c7a81994611ff0253"],"state_sha256":"7b0324f33b35e6dd8bec81466fa71a5d24afd337a902ea6763802fec45a75d7d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GuI7Yjohg0B3AzETt/ObqQsARtIPzjv8/1M8NvifYq59Mgz9dXkPpX+2Lx0wdGtU6g1rV6O2DJn8ltwFMJmDBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T05:27:48.370299Z","bundle_sha256":"092732e091804b51961c07ec5495e5a95db3c70b55bd7da4ee59fcc60deed69d"}}