{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2JAZ372QII4VL5IY7J7BBUD6PJ","short_pith_number":"pith:2JAZ372Q","canonical_record":{"source":{"id":"1807.10356","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-26T20:43:33Z","cross_cats_sorted":[],"title_canon_sha256":"aadcafd97087c5cb53639f3d987b2e01a1946b0c6acd15b96ff0319f2665a93d","abstract_canon_sha256":"66ef771cbf684666e8e4f0ed229bd88673c4feb809c46a1ff0af83ae2c2f59e0"},"schema_version":"1.0"},"canonical_sha256":"d2419dff50423955f518fa7e10d07e7a5ac3f914864b9e9436c8b97a2a037044","source":{"kind":"arxiv","id":"1807.10356","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10356","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10356v1","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10356","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"pith_short_12","alias_value":"2JAZ372QII4V","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2JAZ372QII4VL5IY","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2JAZ372Q","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2JAZ372QII4VL5IY7J7BBUD6PJ","target":"record","payload":{"canonical_record":{"source":{"id":"1807.10356","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-26T20:43:33Z","cross_cats_sorted":[],"title_canon_sha256":"aadcafd97087c5cb53639f3d987b2e01a1946b0c6acd15b96ff0319f2665a93d","abstract_canon_sha256":"66ef771cbf684666e8e4f0ed229bd88673c4feb809c46a1ff0af83ae2c2f59e0"},"schema_version":"1.0"},"canonical_sha256":"d2419dff50423955f518fa7e10d07e7a5ac3f914864b9e9436c8b97a2a037044","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:30.219252Z","signature_b64":"tqXvjuJN6dIsfA1X9nlHvZmUHdxtolcoBz3mCT8xZXwzL6rUNyHcwkR0BpmePTE1dbSKZZ144tYkbw6Ae3QjBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2419dff50423955f518fa7e10d07e7a5ac3f914864b9e9436c8b97a2a037044","last_reissued_at":"2026-05-18T00:05:30.218811Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:30.218811Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.10356","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":"2026-05-18T00:05:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oalQaa02eIsPfzay6MKlmsBTFUsM0+dT5AYJcWgwc4Gqgc0OwFMd3wGxLCXdimp+Rx8vrblp9w3uVIPvT4+FDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:54:42.547425Z"},"content_sha256":"230085302313e23c8940be9fa692cf82dda9c204e18c9766b25dd6ad2359cd32","schema_version":"1.0","event_id":"sha256:230085302313e23c8940be9fa692cf82dda9c204e18c9766b25dd6ad2359cd32"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2JAZ372QII4VL5IY7J7BBUD6PJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Keck Cosmic Web Imager Integral Field Spectrograph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alex Delecroix, Andrew Phillips, Anna Moore, Behnam Darvish, Bob Weber, Constance Rockosi, Dave Cowley, David Hilyard, David Sheikh, D. Christopher Martin, Donal O'Sullivan, Ean James, Greg Doppman, Harland Epps, Hector Rodriguez, James D. Neill, Jason Fucik, Jason Weiss, Jerry Cabak, Justin Belicki, Kirk Seaman, Kyle Lanclos, Luca Rizzi, Marty Crabill, Matuesz Matuszewski, Michael Kokorowski, Patrick Morrissey, Prachi Parihar, Randy Bartos, Ray Zarzaca, Sam Park, Sean Adkins, Shawn Callahan, Shui Kwok, Steve Allen, Steve Kaye, Steve Milner, Willian Deich, Yves Salaun","submitted_at":"2018-07-26T20:43:33Z","abstract_excerpt":"We report on the design and performance of the Keck Cosmic Web Imager (KCWI), a general purpose optical integral field spectrograph that has been installed at the Nasmyth port of the 10 m Keck II telescope on Mauna Kea, HI. The novel design provides blue-optimized seeing-limited imaging from 350-560 nm with configurable spectral resolution from 1000 - 20000 in a field of view up to 20\"x33\". Selectable volume phase holographic (VPH) gratings and high performance dielectric, multilayer silver and enhanced aluminum coatings provide end-to-end peak efficiency in excess of 45% while accommodating t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10356","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":"2026-05-18T00:05:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XWXLfdZZc80lEoNxXWatxJKdxlwhdvbsmgeRV+s0hszQk+OiYZwtBauKeaP3hQ1uJbR1WdqBPqem05Ac3EFkAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:54:42.548014Z"},"content_sha256":"698faf9e13ae2be28f888e5caebef9a429a927f20ccafd71f62b7e627a2617a9","schema_version":"1.0","event_id":"sha256:698faf9e13ae2be28f888e5caebef9a429a927f20ccafd71f62b7e627a2617a9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/bundle.json","state_url":"https://pith.science/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/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":"2026-05-27T07:54:42Z","links":{"resolver":"https://pith.science/pith/2JAZ372QII4VL5IY7J7BBUD6PJ","bundle":"https://pith.science/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/bundle.json","state":"https://pith.science/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2JAZ372QII4VL5IY7J7BBUD6PJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2JAZ372QII4VL5IY7J7BBUD6PJ","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":"66ef771cbf684666e8e4f0ed229bd88673c4feb809c46a1ff0af83ae2c2f59e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-26T20:43:33Z","title_canon_sha256":"aadcafd97087c5cb53639f3d987b2e01a1946b0c6acd15b96ff0319f2665a93d"},"schema_version":"1.0","source":{"id":"1807.10356","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10356","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10356v1","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10356","created_at":"2026-05-18T00:05:30Z"},{"alias_kind":"pith_short_12","alias_value":"2JAZ372QII4V","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2JAZ372QII4VL5IY","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2JAZ372Q","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:698faf9e13ae2be28f888e5caebef9a429a927f20ccafd71f62b7e627a2617a9","target":"graph","created_at":"2026-05-18T00:05:30Z","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 report on the design and performance of the Keck Cosmic Web Imager (KCWI), a general purpose optical integral field spectrograph that has been installed at the Nasmyth port of the 10 m Keck II telescope on Mauna Kea, HI. The novel design provides blue-optimized seeing-limited imaging from 350-560 nm with configurable spectral resolution from 1000 - 20000 in a field of view up to 20\"x33\". Selectable volume phase holographic (VPH) gratings and high performance dielectric, multilayer silver and enhanced aluminum coatings provide end-to-end peak efficiency in excess of 45% while accommodating t","authors_text":"Alex Delecroix, Andrew Phillips, Anna Moore, Behnam Darvish, Bob Weber, Constance Rockosi, Dave Cowley, David Hilyard, David Sheikh, D. Christopher Martin, Donal O'Sullivan, Ean James, Greg Doppman, Harland Epps, Hector Rodriguez, James D. Neill, Jason Fucik, Jason Weiss, Jerry Cabak, Justin Belicki, Kirk Seaman, Kyle Lanclos, Luca Rizzi, Marty Crabill, Matuesz Matuszewski, Michael Kokorowski, Patrick Morrissey, Prachi Parihar, Randy Bartos, Ray Zarzaca, Sam Park, Sean Adkins, Shawn Callahan, Shui Kwok, Steve Allen, Steve Kaye, Steve Milner, Willian Deich, Yves Salaun","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-26T20:43:33Z","title":"The Keck Cosmic Web Imager Integral Field Spectrograph"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10356","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":"sha256:230085302313e23c8940be9fa692cf82dda9c204e18c9766b25dd6ad2359cd32","target":"record","created_at":"2026-05-18T00:05:30Z","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":"66ef771cbf684666e8e4f0ed229bd88673c4feb809c46a1ff0af83ae2c2f59e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-26T20:43:33Z","title_canon_sha256":"aadcafd97087c5cb53639f3d987b2e01a1946b0c6acd15b96ff0319f2665a93d"},"schema_version":"1.0","source":{"id":"1807.10356","kind":"arxiv","version":1}},"canonical_sha256":"d2419dff50423955f518fa7e10d07e7a5ac3f914864b9e9436c8b97a2a037044","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2419dff50423955f518fa7e10d07e7a5ac3f914864b9e9436c8b97a2a037044","first_computed_at":"2026-05-18T00:05:30.218811Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:30.218811Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tqXvjuJN6dIsfA1X9nlHvZmUHdxtolcoBz3mCT8xZXwzL6rUNyHcwkR0BpmePTE1dbSKZZ144tYkbw6Ae3QjBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:30.219252Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10356","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:230085302313e23c8940be9fa692cf82dda9c204e18c9766b25dd6ad2359cd32","sha256:698faf9e13ae2be28f888e5caebef9a429a927f20ccafd71f62b7e627a2617a9"],"state_sha256":"a86515f4b41927115f6f77d8d69472b9e586bf4c5ea733090a8b45775e203610"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A/he5fiDXPWhlPlCFGXQ2NORIAe06eFs5HKiGPw7w5P2MC4x1qr4AQazi29TgMvqo68YQ7aAZIG56BUByKmGDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:54:42.551218Z","bundle_sha256":"3e4fa76fb7db7a02f63182155b418c2d3d0cafdeb9fd45d499f10c91572f9e2c"}}