{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DRYU2TYODQTMAZSYATADITXWIE","short_pith_number":"pith:DRYU2TYO","canonical_record":{"source":{"id":"1512.07309","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-23T00:16:17Z","cross_cats_sorted":[],"title_canon_sha256":"1bf1524799a1c0e17c3efad411a9fcd09eab1859d0aea7ab222cf9ec646f8854","abstract_canon_sha256":"a77439bb11522a2987271b2c252ebb7120d5bf1f198bd529df97dd324ed87d89"},"schema_version":"1.0"},"canonical_sha256":"1c714d4f0e1c26c0665804c0344ef6411bbb6a114fbf784da499e4238c3b0ebf","source":{"kind":"arxiv","id":"1512.07309","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.07309","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"arxiv_version","alias_value":"1512.07309v1","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.07309","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"pith_short_12","alias_value":"DRYU2TYODQTM","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DRYU2TYODQTMAZSY","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DRYU2TYO","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DRYU2TYODQTMAZSYATADITXWIE","target":"record","payload":{"canonical_record":{"source":{"id":"1512.07309","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-23T00:16:17Z","cross_cats_sorted":[],"title_canon_sha256":"1bf1524799a1c0e17c3efad411a9fcd09eab1859d0aea7ab222cf9ec646f8854","abstract_canon_sha256":"a77439bb11522a2987271b2c252ebb7120d5bf1f198bd529df97dd324ed87d89"},"schema_version":"1.0"},"canonical_sha256":"1c714d4f0e1c26c0665804c0344ef6411bbb6a114fbf784da499e4238c3b0ebf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:02:45.266655Z","signature_b64":"XeD8553Ao1lTRmQZ0MeUaBje4lWz88sBhWSaAjqR6oybI1nWkb4qscH5jg9rX+IDsbwQ6iigFOEP2UbJHOEVAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c714d4f0e1c26c0665804c0344ef6411bbb6a114fbf784da499e4238c3b0ebf","last_reissued_at":"2026-05-18T01:02:45.266095Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:02:45.266095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.07309","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":"2026-05-18T01:02:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"miE4n2peiHdjQCgS7SradQFpPJrtAwGLFN46ts0C7ALWaHhw1Be2Gzn75D/iOIvk/wG8UHfc6NJvoIW9MAyACQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:30:35.413992Z"},"content_sha256":"c981ba2c24383f6cd2360ea5566ecd2c08b37dee06f3fc1d216b96dbbe043a8e","schema_version":"1.0","event_id":"sha256:c981ba2c24383f6cd2360ea5566ecd2c08b37dee06f3fc1d216b96dbbe043a8e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DRYU2TYODQTMAZSYATADITXWIE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alastair G. Basden, Alexander Arriola, David G. MacLachlan, Debaditya Choudhury, Eric Gendron, Itandehui Gris-S\\'anchez, Izabela J. Spaleniak, Jeremy R. Allington-Smith, Robert J. Harris, Robert R. Thomson, Tim A. Birks, Timothy J. Morris","submitted_at":"2015-12-23T00:16:17Z","abstract_excerpt":"The spectral resolution of a dispersive astronomical spectrograph is limited by the trade-off between throughput and the width of the entrance slit. Photonic guided-wave transitions have been proposed as a route to bypass this trade-off, by enabling the efficient reformatting of incoherent seeing-limited light collected by the telescope into a linear array of single modes: a pseudo-slit which is highly multimode in one axis but diffraction-limited in the dispersion axis of the spectrograph. It is anticipated that the size of a single-object spectrograph fed with light in this manner would be e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.07309","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":"2026-05-18T01:02:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ClwDlq4GpIv2EwjlHpQo4WsEljR4r2gtqhMcWBzT+6xrJkUToE6vcDUjtaUbjelFH8TKTqmAruEOCAWUDEvfDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:30:35.414440Z"},"content_sha256":"e8915039b585181bee078d1b78d3d518ae75f1b1871335bda6c497ad556e0bad","schema_version":"1.0","event_id":"sha256:e8915039b585181bee078d1b78d3d518ae75f1b1871335bda6c497ad556e0bad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DRYU2TYODQTMAZSYATADITXWIE/bundle.json","state_url":"https://pith.science/pith/DRYU2TYODQTMAZSYATADITXWIE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DRYU2TYODQTMAZSYATADITXWIE/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":"2026-05-26T16:30:35Z","links":{"resolver":"https://pith.science/pith/DRYU2TYODQTMAZSYATADITXWIE","bundle":"https://pith.science/pith/DRYU2TYODQTMAZSYATADITXWIE/bundle.json","state":"https://pith.science/pith/DRYU2TYODQTMAZSYATADITXWIE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DRYU2TYODQTMAZSYATADITXWIE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DRYU2TYODQTMAZSYATADITXWIE","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":"a77439bb11522a2987271b2c252ebb7120d5bf1f198bd529df97dd324ed87d89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-23T00:16:17Z","title_canon_sha256":"1bf1524799a1c0e17c3efad411a9fcd09eab1859d0aea7ab222cf9ec646f8854"},"schema_version":"1.0","source":{"id":"1512.07309","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.07309","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"arxiv_version","alias_value":"1512.07309v1","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.07309","created_at":"2026-05-18T01:02:45Z"},{"alias_kind":"pith_short_12","alias_value":"DRYU2TYODQTM","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DRYU2TYODQTMAZSY","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DRYU2TYO","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:e8915039b585181bee078d1b78d3d518ae75f1b1871335bda6c497ad556e0bad","target":"graph","created_at":"2026-05-18T01:02:45Z","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":"The spectral resolution of a dispersive astronomical spectrograph is limited by the trade-off between throughput and the width of the entrance slit. Photonic guided-wave transitions have been proposed as a route to bypass this trade-off, by enabling the efficient reformatting of incoherent seeing-limited light collected by the telescope into a linear array of single modes: a pseudo-slit which is highly multimode in one axis but diffraction-limited in the dispersion axis of the spectrograph. It is anticipated that the size of a single-object spectrograph fed with light in this manner would be e","authors_text":"Alastair G. Basden, Alexander Arriola, David G. MacLachlan, Debaditya Choudhury, Eric Gendron, Itandehui Gris-S\\'anchez, Izabela J. Spaleniak, Jeremy R. Allington-Smith, Robert J. Harris, Robert R. Thomson, Tim A. Birks, Timothy J. Morris","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-23T00:16:17Z","title":"Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.07309","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:c981ba2c24383f6cd2360ea5566ecd2c08b37dee06f3fc1d216b96dbbe043a8e","target":"record","created_at":"2026-05-18T01:02:45Z","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":"a77439bb11522a2987271b2c252ebb7120d5bf1f198bd529df97dd324ed87d89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-23T00:16:17Z","title_canon_sha256":"1bf1524799a1c0e17c3efad411a9fcd09eab1859d0aea7ab222cf9ec646f8854"},"schema_version":"1.0","source":{"id":"1512.07309","kind":"arxiv","version":1}},"canonical_sha256":"1c714d4f0e1c26c0665804c0344ef6411bbb6a114fbf784da499e4238c3b0ebf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c714d4f0e1c26c0665804c0344ef6411bbb6a114fbf784da499e4238c3b0ebf","first_computed_at":"2026-05-18T01:02:45.266095Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:02:45.266095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XeD8553Ao1lTRmQZ0MeUaBje4lWz88sBhWSaAjqR6oybI1nWkb4qscH5jg9rX+IDsbwQ6iigFOEP2UbJHOEVAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:02:45.266655Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.07309","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c981ba2c24383f6cd2360ea5566ecd2c08b37dee06f3fc1d216b96dbbe043a8e","sha256:e8915039b585181bee078d1b78d3d518ae75f1b1871335bda6c497ad556e0bad"],"state_sha256":"a4655a0474667d31e2ea9caba035247bf2d2af59988d5a3355c70717bbf36e53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jC15nkC8ZmiLbVOnccxFaf/qbHVqjuqN0LzqG/HUQ/u8UAKV0hrHZrMaGvXD4NVWE75FtqC81+jh5fJcpP04AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:30:35.417830Z","bundle_sha256":"78796eb9c3f6a12443f7dcfab0124f2f33281a8e216824fa67172f84cd980bb6"}}