{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:6TIQMW7H52KE2RTE7T2E2VHXQG","short_pith_number":"pith:6TIQMW7H","canonical_record":{"source":{"id":"1507.02680","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-09T20:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"8b22d60ee282372ad1ac93fdca1242b2be8c0d21aa5bf9e40446d17fd534cfa3","abstract_canon_sha256":"62d09203ffefbb7cf789134352cba7d2431655ef0ff485bd33431575075c67a1"},"schema_version":"1.0"},"canonical_sha256":"f4d1065be7ee944d4664fcf44d54f781b68fd52ffff08411cd7bc2095a710e52","source":{"kind":"arxiv","id":"1507.02680","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02680","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02680v1","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02680","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"pith_short_12","alias_value":"6TIQMW7H52KE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6TIQMW7H52KE2RTE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6TIQMW7H","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:6TIQMW7H52KE2RTE7T2E2VHXQG","target":"record","payload":{"canonical_record":{"source":{"id":"1507.02680","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-09T20:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"8b22d60ee282372ad1ac93fdca1242b2be8c0d21aa5bf9e40446d17fd534cfa3","abstract_canon_sha256":"62d09203ffefbb7cf789134352cba7d2431655ef0ff485bd33431575075c67a1"},"schema_version":"1.0"},"canonical_sha256":"f4d1065be7ee944d4664fcf44d54f781b68fd52ffff08411cd7bc2095a710e52","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:07.055538Z","signature_b64":"3i/h2RK+bJE6H5MsUFuTiRWOxtvdQV8Zjx5RX7bRnjz6Led7ByNcC5FT4kDKlIIqpzYQonFVGOGCN9rORmrPBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4d1065be7ee944d4664fcf44d54f781b68fd52ffff08411cd7bc2095a710e52","last_reissued_at":"2026-05-18T01:35:07.054855Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:07.054855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.02680","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":"2026-05-18T01:35:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WRJpuKhhwsZh+PwTmUoEcXFTRDPDleaLSkJpO6PGqBzFGZ5MbAYIgHVPdwy1gtsnU6aqgYwfrI8Tj9ER17IQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:44:54.498260Z"},"content_sha256":"eb038ddf80ef1929599896f8518a9520f78fd37d923ccb504951e01faff1d704","schema_version":"1.0","event_id":"sha256:eb038ddf80ef1929599896f8518a9520f78fd37d923ccb504951e01faff1d704"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:6TIQMW7H52KE2RTE7T2E2VHXQG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-speed imaging and wavefront sensing with an infrared avalanche photodiode array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Christoph Baranec, Dani Atkinson, Donald Hall, Mark Chun, Nicholas M. Law, Reed Riddle, Shane Jacobson","submitted_at":"2015-07-09T20:00:14Z","abstract_excerpt":"Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths. We recently demonstrated the use of an early engineering-grade infrared avalanche photodiode array that achieves a correlated double sampling read noise of 0.73 e- in the lab, and a total noise of 2.52 e- on sky, and supports simultaneous high-speed imaging and tip-tilt wavefront sensing with the Robo-AO visible-light laser adaptive optics system at the Palomar Observatory 1.5-m telescope. We repo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02680","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":"2026-05-18T01:35:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"887SiNQGqgz9Z89bMaXSMyulmijLwSUaJQRcJIL4+sWFYJhmofGvgEDjUiNlPhwAn/JENVwihMZufc/W7e7qDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:44:54.498624Z"},"content_sha256":"9e06f26ad2a859df5fbc713d2694fc20c191830a09d9d1f12a0189de2e324d2a","schema_version":"1.0","event_id":"sha256:9e06f26ad2a859df5fbc713d2694fc20c191830a09d9d1f12a0189de2e324d2a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/bundle.json","state_url":"https://pith.science/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/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":"2026-06-03T09:44:54Z","links":{"resolver":"https://pith.science/pith/6TIQMW7H52KE2RTE7T2E2VHXQG","bundle":"https://pith.science/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/bundle.json","state":"https://pith.science/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6TIQMW7H52KE2RTE7T2E2VHXQG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6TIQMW7H52KE2RTE7T2E2VHXQG","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":"62d09203ffefbb7cf789134352cba7d2431655ef0ff485bd33431575075c67a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-09T20:00:14Z","title_canon_sha256":"8b22d60ee282372ad1ac93fdca1242b2be8c0d21aa5bf9e40446d17fd534cfa3"},"schema_version":"1.0","source":{"id":"1507.02680","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02680","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02680v1","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02680","created_at":"2026-05-18T01:35:07Z"},{"alias_kind":"pith_short_12","alias_value":"6TIQMW7H52KE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6TIQMW7H52KE2RTE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6TIQMW7H","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:9e06f26ad2a859df5fbc713d2694fc20c191830a09d9d1f12a0189de2e324d2a","target":"graph","created_at":"2026-05-18T01:35:07Z","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":"Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths. We recently demonstrated the use of an early engineering-grade infrared avalanche photodiode array that achieves a correlated double sampling read noise of 0.73 e- in the lab, and a total noise of 2.52 e- on sky, and supports simultaneous high-speed imaging and tip-tilt wavefront sensing with the Robo-AO visible-light laser adaptive optics system at the Palomar Observatory 1.5-m telescope. We repo","authors_text":"Christoph Baranec, Dani Atkinson, Donald Hall, Mark Chun, Nicholas M. Law, Reed Riddle, Shane Jacobson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-09T20:00:14Z","title":"High-speed imaging and wavefront sensing with an infrared avalanche photodiode array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02680","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:eb038ddf80ef1929599896f8518a9520f78fd37d923ccb504951e01faff1d704","target":"record","created_at":"2026-05-18T01:35:07Z","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":"62d09203ffefbb7cf789134352cba7d2431655ef0ff485bd33431575075c67a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-09T20:00:14Z","title_canon_sha256":"8b22d60ee282372ad1ac93fdca1242b2be8c0d21aa5bf9e40446d17fd534cfa3"},"schema_version":"1.0","source":{"id":"1507.02680","kind":"arxiv","version":1}},"canonical_sha256":"f4d1065be7ee944d4664fcf44d54f781b68fd52ffff08411cd7bc2095a710e52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4d1065be7ee944d4664fcf44d54f781b68fd52ffff08411cd7bc2095a710e52","first_computed_at":"2026-05-18T01:35:07.054855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:07.054855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3i/h2RK+bJE6H5MsUFuTiRWOxtvdQV8Zjx5RX7bRnjz6Led7ByNcC5FT4kDKlIIqpzYQonFVGOGCN9rORmrPBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:07.055538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.02680","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb038ddf80ef1929599896f8518a9520f78fd37d923ccb504951e01faff1d704","sha256:9e06f26ad2a859df5fbc713d2694fc20c191830a09d9d1f12a0189de2e324d2a"],"state_sha256":"9a4a27e0ab3a5426bc6d58864045353af17044c8092ee6500319d8c531895713"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WstRVMmqPmOlVj5T4mbFAewvVGsrd0ZYFrU2xMj4hPscpHIxqNJwJHGUrCzO5IADqMrkHke9MHXslp3fKYCzDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T09:44:54.500561Z","bundle_sha256":"323f9ffef541466aff9b4371303f5fd5e5b84d96cde69ca01c10440aad0c2d6d"}}