{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:ZPF3YOL65B6IFDOP622NW75JEQ","short_pith_number":"pith:ZPF3YOL6","canonical_record":{"source":{"id":"1407.0979","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-03T16:41:11Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"f63e7fc1e6f114b72712151d9f32f9c6403cc4a989c6a8b5d5d962a2c84e23cd","abstract_canon_sha256":"796fc0e4183f72682dbf4493c5c90d01a09b4989d26352409838533b988d1249"},"schema_version":"1.0"},"canonical_sha256":"cbcbbc397ee87c828dcff6b4db7fa9240b1d0be22f2cc0aa4c272bb8c9b67091","source":{"kind":"arxiv","id":"1407.0979","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0979","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0979v1","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0979","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"pith_short_12","alias_value":"ZPF3YOL65B6I","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZPF3YOL65B6IFDOP","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZPF3YOL6","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:ZPF3YOL65B6IFDOP622NW75JEQ","target":"record","payload":{"canonical_record":{"source":{"id":"1407.0979","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-03T16:41:11Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"f63e7fc1e6f114b72712151d9f32f9c6403cc4a989c6a8b5d5d962a2c84e23cd","abstract_canon_sha256":"796fc0e4183f72682dbf4493c5c90d01a09b4989d26352409838533b988d1249"},"schema_version":"1.0"},"canonical_sha256":"cbcbbc397ee87c828dcff6b4db7fa9240b1d0be22f2cc0aa4c272bb8c9b67091","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:48:25.020108Z","signature_b64":"RCvknEeLHaUCIHzk1XJXLcchoiXVrpTlIBNd7k4/1bSWi4ChNvo8M8c4J0H2gum/fM1o4ta3oooDX1YFn5XMAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbcbbc397ee87c828dcff6b4db7fa9240b1d0be22f2cc0aa4c272bb8c9b67091","last_reissued_at":"2026-05-18T02:48:25.019620Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:48:25.019620Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.0979","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":"2026-05-18T02:48:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wMl729kzoET9b5XGLx4+k8czlp3WwctKQkb5YyLmsU31SUvs5vACWEQnLyFOiCM5ysKMsGPvlG/lJRHeOboGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:52:01.602162Z"},"content_sha256":"e68809c8987fb545fbac9230d22ce271459ffa2dbe5f310943a42cb37ff5fd7a","schema_version":"1.0","event_id":"sha256:e68809c8987fb545fbac9230d22ce271459ffa2dbe5f310943a42cb37ff5fd7a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:ZPF3YOL65B6IFDOP622NW75JEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Alexis Carlotti, Bruce Macintosh, Dimitri Mawet, Elodie Choquet, Erin Elliot, J. Kent Wallace, Laurent Pueyo, Mamadou N'Diaye, Marshall D. Perrin, Matt Sheckells, N. Jeremy Kasdin, R\\'emi Soummer, Stuart Shaklan, Tyler Groff","submitted_at":"2014-07-03T16:41:11Z","abstract_excerpt":"Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central obstruction, support structures, segmentation) that makes high-contrast imaging more challenging. We are developing a new high-contrast imaging testbed at STScI to provide an integrated solution for wavefront control and starlight suppression on com"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0979","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":"2026-05-18T02:48:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mrCCCTmylC931aLKG1s8xjTroKRpN6p30KRTO/GPtjozweBQnFbnNXICPc960sYffuSBTxfS4PeSjH1Q3foJCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:52:01.602538Z"},"content_sha256":"79900762b770ec20d97828497b4836d947a7b5d0d0ae503bea36ab3477dfd896","schema_version":"1.0","event_id":"sha256:79900762b770ec20d97828497b4836d947a7b5d0d0ae503bea36ab3477dfd896"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZPF3YOL65B6IFDOP622NW75JEQ/bundle.json","state_url":"https://pith.science/pith/ZPF3YOL65B6IFDOP622NW75JEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZPF3YOL65B6IFDOP622NW75JEQ/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":"2026-06-03T06:52:01Z","links":{"resolver":"https://pith.science/pith/ZPF3YOL65B6IFDOP622NW75JEQ","bundle":"https://pith.science/pith/ZPF3YOL65B6IFDOP622NW75JEQ/bundle.json","state":"https://pith.science/pith/ZPF3YOL65B6IFDOP622NW75JEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZPF3YOL65B6IFDOP622NW75JEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ZPF3YOL65B6IFDOP622NW75JEQ","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":"796fc0e4183f72682dbf4493c5c90d01a09b4989d26352409838533b988d1249","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-03T16:41:11Z","title_canon_sha256":"f63e7fc1e6f114b72712151d9f32f9c6403cc4a989c6a8b5d5d962a2c84e23cd"},"schema_version":"1.0","source":{"id":"1407.0979","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0979","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0979v1","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0979","created_at":"2026-05-18T02:48:25Z"},{"alias_kind":"pith_short_12","alias_value":"ZPF3YOL65B6I","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZPF3YOL65B6IFDOP","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZPF3YOL6","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:79900762b770ec20d97828497b4836d947a7b5d0d0ae503bea36ab3477dfd896","target":"graph","created_at":"2026-05-18T02:48:25Z","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":"Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central obstruction, support structures, segmentation) that makes high-contrast imaging more challenging. We are developing a new high-contrast imaging testbed at STScI to provide an integrated solution for wavefront control and starlight suppression on com","authors_text":"Alexis Carlotti, Bruce Macintosh, Dimitri Mawet, Elodie Choquet, Erin Elliot, J. Kent Wallace, Laurent Pueyo, Mamadou N'Diaye, Marshall D. Perrin, Matt Sheckells, N. Jeremy Kasdin, R\\'emi Soummer, Stuart Shaklan, Tyler Groff","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-03T16:41:11Z","title":"High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0979","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:e68809c8987fb545fbac9230d22ce271459ffa2dbe5f310943a42cb37ff5fd7a","target":"record","created_at":"2026-05-18T02:48:25Z","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":"796fc0e4183f72682dbf4493c5c90d01a09b4989d26352409838533b988d1249","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-03T16:41:11Z","title_canon_sha256":"f63e7fc1e6f114b72712151d9f32f9c6403cc4a989c6a8b5d5d962a2c84e23cd"},"schema_version":"1.0","source":{"id":"1407.0979","kind":"arxiv","version":1}},"canonical_sha256":"cbcbbc397ee87c828dcff6b4db7fa9240b1d0be22f2cc0aa4c272bb8c9b67091","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbcbbc397ee87c828dcff6b4db7fa9240b1d0be22f2cc0aa4c272bb8c9b67091","first_computed_at":"2026-05-18T02:48:25.019620Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:48:25.019620Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RCvknEeLHaUCIHzk1XJXLcchoiXVrpTlIBNd7k4/1bSWi4ChNvo8M8c4J0H2gum/fM1o4ta3oooDX1YFn5XMAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:48:25.020108Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.0979","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e68809c8987fb545fbac9230d22ce271459ffa2dbe5f310943a42cb37ff5fd7a","sha256:79900762b770ec20d97828497b4836d947a7b5d0d0ae503bea36ab3477dfd896"],"state_sha256":"39487451a77e81af0d75a668f54ff0f2ffb48fbf98fe21856c229f3b8c37859f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y3JZYUpw1QwdYNblxouoNf44BnmKWWUv5E6tbsBK7pcnJGBg1xFLTSvB1eW6GmuLrxWOwLN9YnpHK81fS/juDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T06:52:01.604828Z","bundle_sha256":"ae6ffcd63ade8abd309010d89255ada2ab25eeccd17b54885aa858d2a350a037"}}