{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:PHL2FD2CVVMWR3TP4CHDPNKMTJ","short_pith_number":"pith:PHL2FD2C","canonical_record":{"source":{"id":"2207.06523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-13T21:17:36Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"b89f3bd5b5468c09137dc7de0de61fcf2f8e82b8c6eba91f5cbc1300e44d6b02","abstract_canon_sha256":"75dae5d4751a9eeae361f604f1301d44a84449fe80ba9bd0b2ddfef307c29043"},"schema_version":"1.0"},"canonical_sha256":"79d7a28f42ad5968ee6fe08e37b54c9a772bf1497f57a6396c2fe40ce0108ed0","source":{"kind":"arxiv","id":"2207.06523","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.06523","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"arxiv_version","alias_value":"2207.06523v1","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.06523","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_12","alias_value":"PHL2FD2CVVMW","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_16","alias_value":"PHL2FD2CVVMWR3TP","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_8","alias_value":"PHL2FD2C","created_at":"2026-07-05T04:40:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:PHL2FD2CVVMWR3TP4CHDPNKMTJ","target":"record","payload":{"canonical_record":{"source":{"id":"2207.06523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-13T21:17:36Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"b89f3bd5b5468c09137dc7de0de61fcf2f8e82b8c6eba91f5cbc1300e44d6b02","abstract_canon_sha256":"75dae5d4751a9eeae361f604f1301d44a84449fe80ba9bd0b2ddfef307c29043"},"schema_version":"1.0"},"canonical_sha256":"79d7a28f42ad5968ee6fe08e37b54c9a772bf1497f57a6396c2fe40ce0108ed0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:40:13.598793Z","signature_b64":"aA8vbaCSE74pI54pe7MgnX/K8M6QT7vCrvi2NmrKcPS5tmRA5XeCVSJyTA5PeD/r9pQcHNovMTEAQ5s0P49rDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"79d7a28f42ad5968ee6fe08e37b54c9a772bf1497f57a6396c2fe40ce0108ed0","last_reissued_at":"2026-07-05T04:40:13.598280Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:40:13.598280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2207.06523","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":"2026-07-05T04:40:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QwLORTkjObl7L9jRURXEeoR6jP4U1CYrtLtBkSR6fS80DdvfEicmXO/zv1F9RSkDVg1Gh0QK85Ex+XYC4YxoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T11:42:34.239396Z"},"content_sha256":"40f035b327a45217046bf540defbc1e37ce190e298a96658708132b0ac66b3fb","schema_version":"1.0","event_id":"sha256:40f035b327a45217046bf540defbc1e37ce190e298a96658708132b0ac66b3fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:PHL2FD2CVVMWR3TP4CHDPNKMTJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Report on Community Cadence Observing to Maximize the Scientific Output of the Keck Planet Finder","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Andrew Howard, Arpita Roy, BJ Fulton, Carolyn Jordan, Charles Beichman, Daniel Huber, Debra Fischer, Erik Petigura, Howard Isaacson, Jacob Bean, Johanna Teske, John O'Meara, Josh Walawender, Paul Robertson","submitted_at":"2022-07-13T21:17:36Z","abstract_excerpt":"The arrival of the Keck Planet Finder (KPF) in 2022 represents a major advance in the precision radial velocity (PRV) capabilities of the W. M. Keck Observatory. In preparation for KPF science, our committee of PRV experts and WMKO staff studied the current implementation of cadence observing at Keck and other PRV facilities. We find that many of KPF's major science cases are not feasible through Keck's standard allocations of full or half nights to individual PIs. Pooling time among several PIs as is currently done by the California Planet Search (CPS) collaboration with HIRES results in lowe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.06523","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/2207.06523/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":"2026-07-05T04:40:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hEwYk43eY3SulwmRG+3w/cSfyDHU2lTwwwb+Bdi6UHJyL5bOSpCxbsvwma4c4oePaUQwGyOm62z2ko49sXsnBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T11:42:34.239782Z"},"content_sha256":"a4a08f7c5a3ffc088507b2120934237722815334c53f87b29b456f1281bc83dd","schema_version":"1.0","event_id":"sha256:a4a08f7c5a3ffc088507b2120934237722815334c53f87b29b456f1281bc83dd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/bundle.json","state_url":"https://pith.science/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/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":"2026-07-06T11:42:34Z","links":{"resolver":"https://pith.science/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ","bundle":"https://pith.science/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/bundle.json","state":"https://pith.science/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PHL2FD2CVVMWR3TP4CHDPNKMTJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:PHL2FD2CVVMWR3TP4CHDPNKMTJ","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":"75dae5d4751a9eeae361f604f1301d44a84449fe80ba9bd0b2ddfef307c29043","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-13T21:17:36Z","title_canon_sha256":"b89f3bd5b5468c09137dc7de0de61fcf2f8e82b8c6eba91f5cbc1300e44d6b02"},"schema_version":"1.0","source":{"id":"2207.06523","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.06523","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"arxiv_version","alias_value":"2207.06523v1","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.06523","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_12","alias_value":"PHL2FD2CVVMW","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_16","alias_value":"PHL2FD2CVVMWR3TP","created_at":"2026-07-05T04:40:13Z"},{"alias_kind":"pith_short_8","alias_value":"PHL2FD2C","created_at":"2026-07-05T04:40:13Z"}],"graph_snapshots":[{"event_id":"sha256:a4a08f7c5a3ffc088507b2120934237722815334c53f87b29b456f1281bc83dd","target":"graph","created_at":"2026-07-05T04:40:13Z","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/2207.06523/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The arrival of the Keck Planet Finder (KPF) in 2022 represents a major advance in the precision radial velocity (PRV) capabilities of the W. M. Keck Observatory. In preparation for KPF science, our committee of PRV experts and WMKO staff studied the current implementation of cadence observing at Keck and other PRV facilities. We find that many of KPF's major science cases are not feasible through Keck's standard allocations of full or half nights to individual PIs. Pooling time among several PIs as is currently done by the California Planet Search (CPS) collaboration with HIRES results in lowe","authors_text":"Andrew Howard, Arpita Roy, BJ Fulton, Carolyn Jordan, Charles Beichman, Daniel Huber, Debra Fischer, Erik Petigura, Howard Isaacson, Jacob Bean, Johanna Teske, John O'Meara, Josh Walawender, Paul Robertson","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-13T21:17:36Z","title":"Report on Community Cadence Observing to Maximize the Scientific Output of the Keck Planet Finder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.06523","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":"sha256:40f035b327a45217046bf540defbc1e37ce190e298a96658708132b0ac66b3fb","target":"record","created_at":"2026-07-05T04:40:13Z","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":"75dae5d4751a9eeae361f604f1301d44a84449fe80ba9bd0b2ddfef307c29043","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-07-13T21:17:36Z","title_canon_sha256":"b89f3bd5b5468c09137dc7de0de61fcf2f8e82b8c6eba91f5cbc1300e44d6b02"},"schema_version":"1.0","source":{"id":"2207.06523","kind":"arxiv","version":1}},"canonical_sha256":"79d7a28f42ad5968ee6fe08e37b54c9a772bf1497f57a6396c2fe40ce0108ed0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79d7a28f42ad5968ee6fe08e37b54c9a772bf1497f57a6396c2fe40ce0108ed0","first_computed_at":"2026-07-05T04:40:13.598280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:40:13.598280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aA8vbaCSE74pI54pe7MgnX/K8M6QT7vCrvi2NmrKcPS5tmRA5XeCVSJyTA5PeD/r9pQcHNovMTEAQ5s0P49rDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:40:13.598793Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.06523","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40f035b327a45217046bf540defbc1e37ce190e298a96658708132b0ac66b3fb","sha256:a4a08f7c5a3ffc088507b2120934237722815334c53f87b29b456f1281bc83dd"],"state_sha256":"4731884f69d90d3e2282d6ec406c0515dd62e8e1224edc51a5a7c930f0ea508d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1tGsgfZoJECrn/1lZ08b6nCbLQaIMEn7T+lxptUSjDyVBPGeezEIG0KP5ZhHfkPkIju1YIvgmfPANWgziIwBCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T11:42:34.242335Z","bundle_sha256":"f430c14d17007fed9cc6ffdebcda096c4397d3c7c3d1f7e3f4790243849f497d"}}