{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XEH3FTW4JLA7M7BWQ6KYVISUQM","short_pith_number":"pith:XEH3FTW4","canonical_record":{"source":{"id":"1608.02985","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-09T21:18:31Z","cross_cats_sorted":[],"title_canon_sha256":"19dd2375b98afbf8669917c06ea8d83ddeda0932266ef4429b368711d83530c2","abstract_canon_sha256":"f85b500f1b149a44697b386ed3bc96c2996eea88fc6dbe6e57ac95476a2a2a14"},"schema_version":"1.0"},"canonical_sha256":"b90fb2cedc4ac1f67c3687958aa254830d09ce8089fd7ad1e3faf417f083268c","source":{"kind":"arxiv","id":"1608.02985","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.02985","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"arxiv_version","alias_value":"1608.02985v1","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.02985","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"pith_short_12","alias_value":"XEH3FTW4JLA7","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XEH3FTW4JLA7M7BW","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XEH3FTW4","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XEH3FTW4JLA7M7BWQ6KYVISUQM","target":"record","payload":{"canonical_record":{"source":{"id":"1608.02985","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-09T21:18:31Z","cross_cats_sorted":[],"title_canon_sha256":"19dd2375b98afbf8669917c06ea8d83ddeda0932266ef4429b368711d83530c2","abstract_canon_sha256":"f85b500f1b149a44697b386ed3bc96c2996eea88fc6dbe6e57ac95476a2a2a14"},"schema_version":"1.0"},"canonical_sha256":"b90fb2cedc4ac1f67c3687958aa254830d09ce8089fd7ad1e3faf417f083268c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:30.534238Z","signature_b64":"IiH4qpQLXJw8EoaDQ80CdZ799TLuzw7a905+XpQb06XvT7yJo+SvqNLxCk3NNuAFqgduTWFQQX7f25PUAw1MBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b90fb2cedc4ac1f67c3687958aa254830d09ce8089fd7ad1e3faf417f083268c","last_reissued_at":"2026-05-18T01:09:30.533841Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:30.533841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.02985","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":"2026-05-18T01:09:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BbeZk4N8BGViG2fWfiVRpPtMz+7wWsNVau13eAQZZPFb8Gso5qxoQ1N3Xxv2a9RxEMBykMth7YSCpYeu/wjEBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:48:06.401705Z"},"content_sha256":"8612d552862bb5fe46d3ce41cac3571e52336a5b94a39f9cc1b9691686207daf","schema_version":"1.0","event_id":"sha256:8612d552862bb5fe46d3ce41cac3571e52336a5b94a39f9cc1b9691686207daf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XEH3FTW4JLA7M7BWQ6KYVISUQM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Robo-AO Kitt Peak: Status of the system and deployment of a sub-electron readnoise IR camera to detect low-mass companions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Christoph Baranec, Dmitry Duev, Maissa Salama, Nicholas M. Law, Rebecca Jensen-Clem, Reed Riddle, Shrinivas Kulkarni","submitted_at":"2016-08-09T21:18:31Z","abstract_excerpt":"We have started an initial three-year deployment of Robo-AO at the 2.1-m telescope at Kitt Peak, Arizona as of November 2015. We report here on the project status and two new developments with the Robo-AO KP system: the commissioning of a sub-electron readnoise SAPHIRA near-infrared camera, which will allow us to widen the scope of possible targets to low-mass stellar and substellar objects; and, performance analysis and tuning of the adaptive optics system, which will improve the sensitivity to these objects. Commissioning of the near-infrared camera and optimizing the AO performance occur in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.02985","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":"2026-05-18T01:09:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VXoykHlLlnH7pDIyUCJj6E8UOKJrCfFK6GttFJb7fV0jHeUm9q+7Yz+cTe1CNL77238woV3nQyFVBgDusF0OCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:48:06.402384Z"},"content_sha256":"1636833671bee5d1a2487de71d1ae9394da4ef00e3a1a2f5b38350f06448fdd3","schema_version":"1.0","event_id":"sha256:1636833671bee5d1a2487de71d1ae9394da4ef00e3a1a2f5b38350f06448fdd3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/bundle.json","state_url":"https://pith.science/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/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":"2026-05-30T22:48:06Z","links":{"resolver":"https://pith.science/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM","bundle":"https://pith.science/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/bundle.json","state":"https://pith.science/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XEH3FTW4JLA7M7BWQ6KYVISUQM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XEH3FTW4JLA7M7BWQ6KYVISUQM","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":"f85b500f1b149a44697b386ed3bc96c2996eea88fc6dbe6e57ac95476a2a2a14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-09T21:18:31Z","title_canon_sha256":"19dd2375b98afbf8669917c06ea8d83ddeda0932266ef4429b368711d83530c2"},"schema_version":"1.0","source":{"id":"1608.02985","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.02985","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"arxiv_version","alias_value":"1608.02985v1","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.02985","created_at":"2026-05-18T01:09:30Z"},{"alias_kind":"pith_short_12","alias_value":"XEH3FTW4JLA7","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XEH3FTW4JLA7M7BW","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XEH3FTW4","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:1636833671bee5d1a2487de71d1ae9394da4ef00e3a1a2f5b38350f06448fdd3","target":"graph","created_at":"2026-05-18T01:09:30Z","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 have started an initial three-year deployment of Robo-AO at the 2.1-m telescope at Kitt Peak, Arizona as of November 2015. We report here on the project status and two new developments with the Robo-AO KP system: the commissioning of a sub-electron readnoise SAPHIRA near-infrared camera, which will allow us to widen the scope of possible targets to low-mass stellar and substellar objects; and, performance analysis and tuning of the adaptive optics system, which will improve the sensitivity to these objects. Commissioning of the near-infrared camera and optimizing the AO performance occur in","authors_text":"Christoph Baranec, Dmitry Duev, Maissa Salama, Nicholas M. Law, Rebecca Jensen-Clem, Reed Riddle, Shrinivas Kulkarni","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-09T21:18:31Z","title":"Robo-AO Kitt Peak: Status of the system and deployment of a sub-electron readnoise IR camera to detect low-mass companions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.02985","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":"sha256:8612d552862bb5fe46d3ce41cac3571e52336a5b94a39f9cc1b9691686207daf","target":"record","created_at":"2026-05-18T01:09:30Z","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":"f85b500f1b149a44697b386ed3bc96c2996eea88fc6dbe6e57ac95476a2a2a14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-09T21:18:31Z","title_canon_sha256":"19dd2375b98afbf8669917c06ea8d83ddeda0932266ef4429b368711d83530c2"},"schema_version":"1.0","source":{"id":"1608.02985","kind":"arxiv","version":1}},"canonical_sha256":"b90fb2cedc4ac1f67c3687958aa254830d09ce8089fd7ad1e3faf417f083268c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b90fb2cedc4ac1f67c3687958aa254830d09ce8089fd7ad1e3faf417f083268c","first_computed_at":"2026-05-18T01:09:30.533841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:30.533841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IiH4qpQLXJw8EoaDQ80CdZ799TLuzw7a905+XpQb06XvT7yJo+SvqNLxCk3NNuAFqgduTWFQQX7f25PUAw1MBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:30.534238Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.02985","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8612d552862bb5fe46d3ce41cac3571e52336a5b94a39f9cc1b9691686207daf","sha256:1636833671bee5d1a2487de71d1ae9394da4ef00e3a1a2f5b38350f06448fdd3"],"state_sha256":"3e1db43fb9f2b8c7d2e86ec57f9bebcaa03135e761466ea5df47048f86640760"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ihAgA/hSvXQU0nNjt4I7Nxot4cUsSg4gJ4hhl1QW+/jbM7aPwdfQvIhmaGaGiW/K8dOjvLjy7xXGyZj0+FWHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:48:06.406559Z","bundle_sha256":"4aa98235d8142e23c10e925c5a84c0696e66866bdf3d8a10beb0e4e37415ec6a"}}