{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:DI7IXYDWIGNJIRADHRSZWDNUNS","short_pith_number":"pith:DI7IXYDW","canonical_record":{"source":{"id":"1407.2998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-11T01:07:46Z","cross_cats_sorted":[],"title_canon_sha256":"98cb6171bb4969366fa9b34462db7869588b60e7c00527741d46dbf4f864ca92","abstract_canon_sha256":"c833fb28e5eb352d2665dfe879a0c7f4d7121b6be170fb15c41b880216826d21"},"schema_version":"1.0"},"canonical_sha256":"1a3e8be076419a9444033c659b0db46c9b0fd6636cf77c2fa765b4928bee5ca3","source":{"kind":"arxiv","id":"1407.2998","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2998","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2998v1","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2998","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"pith_short_12","alias_value":"DI7IXYDWIGNJ","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DI7IXYDWIGNJIRAD","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DI7IXYDW","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:DI7IXYDWIGNJIRADHRSZWDNUNS","target":"record","payload":{"canonical_record":{"source":{"id":"1407.2998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-11T01:07:46Z","cross_cats_sorted":[],"title_canon_sha256":"98cb6171bb4969366fa9b34462db7869588b60e7c00527741d46dbf4f864ca92","abstract_canon_sha256":"c833fb28e5eb352d2665dfe879a0c7f4d7121b6be170fb15c41b880216826d21"},"schema_version":"1.0"},"canonical_sha256":"1a3e8be076419a9444033c659b0db46c9b0fd6636cf77c2fa765b4928bee5ca3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:37.848075Z","signature_b64":"ysNWkUp6jSE0kHExTyt8IWavxWFI6snGXaOM3GdOJ/BNeTyfpS3NQmxuwt0R0C1GvyEY3Jcc8TyIcs4nooZ9Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a3e8be076419a9444033c659b0db46c9b0fd6636cf77c2fa765b4928bee5ca3","last_reissued_at":"2026-05-18T01:42:37.847490Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:37.847490Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.2998","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":"2026-05-18T01:42:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0FLwpMFu86Jt6Muxzz/8IZVRbbr4tWDDpOIp5rkxfIJNlAQdxcMu+wA6RJvfIDQFHEsCRqYK1f5a96sfgVGDAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:11:29.892208Z"},"content_sha256":"e622ee193cd96a149e7102dc76f285b0f832f953d43bd0d69878e723424d4649","schema_version":"1.0","event_id":"sha256:e622ee193cd96a149e7102dc76f285b0f832f953d43bd0d69878e723424d4649"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:DI7IXYDWIGNJIRADHRSZWDNUNS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The InfraRed Imaging Spectrograph (IRIS) for TMT: Reflective ruled diffraction grating performance testing and discussion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Anna M. Moore, Elliot Meyer, Etsuko Mieda, Jacob Gordon, James E. Larkin, Jerome Maire, Luc Simard, Shaojie Chen, Shelley A. Wright","submitted_at":"2014-07-11T01:07:46Z","abstract_excerpt":"We present the efficiency of near-infrared reflective ruled diffraction gratings designed for the InfraRed Imaging Spectrograph (IRIS). IRIS is a first light, integral field spectrograph and imager for the Thirty Meter Telescope (TMT) and narrow field infrared adaptive optics system (NFIRAOS). We present our experimental setup and analysis of the efficiency of selected reflective diffraction gratings. These measurements are used as a comparison sample against selected candidate Volume Phase Holographic (VPH) gratings (see Chen et al., this conference). We investigate the efficiencies of five r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2998","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":"2026-05-18T01:42:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PISl3Rt8wPi6WBOi+c704lqzIPQxDo4hqLFoXS4BRgpaF3fx5iWymeDlvXkyQan8/ntGXnoMC+bQKt0n69hDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:11:29.892892Z"},"content_sha256":"d46f0fd2dbf5fc7efdb923205bf178a83195e9153f499bbd3bd603b1f875f18c","schema_version":"1.0","event_id":"sha256:d46f0fd2dbf5fc7efdb923205bf178a83195e9153f499bbd3bd603b1f875f18c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/bundle.json","state_url":"https://pith.science/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/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":"2026-05-27T05:11:29Z","links":{"resolver":"https://pith.science/pith/DI7IXYDWIGNJIRADHRSZWDNUNS","bundle":"https://pith.science/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/bundle.json","state":"https://pith.science/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DI7IXYDWIGNJIRADHRSZWDNUNS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DI7IXYDWIGNJIRADHRSZWDNUNS","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":"c833fb28e5eb352d2665dfe879a0c7f4d7121b6be170fb15c41b880216826d21","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-11T01:07:46Z","title_canon_sha256":"98cb6171bb4969366fa9b34462db7869588b60e7c00527741d46dbf4f864ca92"},"schema_version":"1.0","source":{"id":"1407.2998","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2998","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2998v1","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2998","created_at":"2026-05-18T01:42:37Z"},{"alias_kind":"pith_short_12","alias_value":"DI7IXYDWIGNJ","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DI7IXYDWIGNJIRAD","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DI7IXYDW","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:d46f0fd2dbf5fc7efdb923205bf178a83195e9153f499bbd3bd603b1f875f18c","target":"graph","created_at":"2026-05-18T01:42:37Z","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 present the efficiency of near-infrared reflective ruled diffraction gratings designed for the InfraRed Imaging Spectrograph (IRIS). IRIS is a first light, integral field spectrograph and imager for the Thirty Meter Telescope (TMT) and narrow field infrared adaptive optics system (NFIRAOS). We present our experimental setup and analysis of the efficiency of selected reflective diffraction gratings. These measurements are used as a comparison sample against selected candidate Volume Phase Holographic (VPH) gratings (see Chen et al., this conference). We investigate the efficiencies of five r","authors_text":"Anna M. Moore, Elliot Meyer, Etsuko Mieda, Jacob Gordon, James E. Larkin, Jerome Maire, Luc Simard, Shaojie Chen, Shelley A. Wright","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-11T01:07:46Z","title":"The InfraRed Imaging Spectrograph (IRIS) for TMT: Reflective ruled diffraction grating performance testing and discussion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2998","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:e622ee193cd96a149e7102dc76f285b0f832f953d43bd0d69878e723424d4649","target":"record","created_at":"2026-05-18T01:42:37Z","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":"c833fb28e5eb352d2665dfe879a0c7f4d7121b6be170fb15c41b880216826d21","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-11T01:07:46Z","title_canon_sha256":"98cb6171bb4969366fa9b34462db7869588b60e7c00527741d46dbf4f864ca92"},"schema_version":"1.0","source":{"id":"1407.2998","kind":"arxiv","version":1}},"canonical_sha256":"1a3e8be076419a9444033c659b0db46c9b0fd6636cf77c2fa765b4928bee5ca3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a3e8be076419a9444033c659b0db46c9b0fd6636cf77c2fa765b4928bee5ca3","first_computed_at":"2026-05-18T01:42:37.847490Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:37.847490Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ysNWkUp6jSE0kHExTyt8IWavxWFI6snGXaOM3GdOJ/BNeTyfpS3NQmxuwt0R0C1GvyEY3Jcc8TyIcs4nooZ9Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:37.848075Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2998","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e622ee193cd96a149e7102dc76f285b0f832f953d43bd0d69878e723424d4649","sha256:d46f0fd2dbf5fc7efdb923205bf178a83195e9153f499bbd3bd603b1f875f18c"],"state_sha256":"cae14e523dc8587802e1ce2d18d35aedc8955c8252a90bd9ca62e817d0299075"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w/nP5N4ymmIqn40IbGWQ5Xe4aXuG8p3LoPzUs3IvU079yLSyFYtUlo6QP/pdekyOmoB36a9R+rg+dQuIFEm1DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:11:29.895359Z","bundle_sha256":"b6e013acce1336d8a90247d3ce02e39788e4ba632a5e5d892caddefb2ad5c92a"}}