{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:ECBDNL2WZXT42WYOKAWUIKQ2LP","short_pith_number":"pith:ECBDNL2W","canonical_record":{"source":{"id":"1402.1743","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-02-07T19:45:11Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c152f7e774ddb8803f0a8aba457f0675cc90a74bbc47980cb3f64ea48d0775c1","abstract_canon_sha256":"6f38f74b5a91225d01e7cec17ce5239e9e421affc2f1f894eceab96d694ae62d"},"schema_version":"1.0"},"canonical_sha256":"208236af56cde7cd5b0e502d442a1a5bc914c7a8e975959421adf6b151256ee3","source":{"kind":"arxiv","id":"1402.1743","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1743","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1743v2","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1743","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"ECBDNL2WZXT4","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"ECBDNL2WZXT42WYO","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"ECBDNL2W","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:ECBDNL2WZXT42WYOKAWUIKQ2LP","target":"record","payload":{"canonical_record":{"source":{"id":"1402.1743","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-02-07T19:45:11Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c152f7e774ddb8803f0a8aba457f0675cc90a74bbc47980cb3f64ea48d0775c1","abstract_canon_sha256":"6f38f74b5a91225d01e7cec17ce5239e9e421affc2f1f894eceab96d694ae62d"},"schema_version":"1.0"},"canonical_sha256":"208236af56cde7cd5b0e502d442a1a5bc914c7a8e975959421adf6b151256ee3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:46.340309Z","signature_b64":"x7GVlRUyDUCU/yBZVcQ89pRZ57sDLzAOcvEiClx8oZDxq1QZYmVyQvxZ3OB6eroGYkhNVPCYrX3Vo5CPI6BpDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"208236af56cde7cd5b0e502d442a1a5bc914c7a8e975959421adf6b151256ee3","last_reissued_at":"2026-05-18T01:44:46.339839Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:46.339839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.1743","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hxkcqOmtNplorXdQg2UD6Xr7tngqu76qPD69aF9Ctxsjik9bPELJtYvaeXJPrM//gm+gI5MtGFJf3Rq0ySIsBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:59:08.044836Z"},"content_sha256":"597a0583a44d6264f804cfec2da85ca606d66655e1290fed0b704f6b214c98fc","schema_version":"1.0","event_id":"sha256:597a0583a44d6264f804cfec2da85ca606d66655e1290fed0b704f6b214c98fc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:ECBDNL2WZXT42WYOKAWUIKQ2LP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sub-nanometer flattening of a 45-cm long, 45-actuator x-ray deformable mirror","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.ins-det","authors_text":"A. Brooks, B. Macintosh, D. Palmer, L. A. Poyneer, M. J. Pivovaroff, T. McCarville, T. Pardini","submitted_at":"2014-02-07T19:45:11Z","abstract_excerpt":"We have built a 45-cm long x-ray deformable mirror of super-polished single-crystal silicon that has 45 actuators along the tangential axis. After assembly the surface height error was 19 nm rms. With use of high-precision visible-light metrology and precise control algorithms, we have actuated the x-ray deformable mirror and flattened its entire surface to 0.7 nm rms controllable figure error. This is, to our knowledge, the first sub-nanometer active flattening of a substrate longer than 15 cm."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1743","kind":"arxiv","version":2},"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":"2026-05-18T01:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u/MODADZwCttBX4lJUrPc3EmjBWwL8zyCGKxCQ+OgYMoExtWhHr9KimWSINBjCHKfcV0qSIRQosRVMayxV43Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:59:08.045186Z"},"content_sha256":"f95bf73c17b4cd61379af7f43bea9ed812f0fbc1d380cb7ffd8bb038d975b461","schema_version":"1.0","event_id":"sha256:f95bf73c17b4cd61379af7f43bea9ed812f0fbc1d380cb7ffd8bb038d975b461"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/bundle.json","state_url":"https://pith.science/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/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":"2026-06-02T23:59:08Z","links":{"resolver":"https://pith.science/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP","bundle":"https://pith.science/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/bundle.json","state":"https://pith.science/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ECBDNL2WZXT42WYOKAWUIKQ2LP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ECBDNL2WZXT42WYOKAWUIKQ2LP","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":"6f38f74b5a91225d01e7cec17ce5239e9e421affc2f1f894eceab96d694ae62d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-02-07T19:45:11Z","title_canon_sha256":"c152f7e774ddb8803f0a8aba457f0675cc90a74bbc47980cb3f64ea48d0775c1"},"schema_version":"1.0","source":{"id":"1402.1743","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1743","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1743v2","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1743","created_at":"2026-05-18T01:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"ECBDNL2WZXT4","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"ECBDNL2WZXT42WYO","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"ECBDNL2W","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:f95bf73c17b4cd61379af7f43bea9ed812f0fbc1d380cb7ffd8bb038d975b461","target":"graph","created_at":"2026-05-18T01:44:46Z","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 have built a 45-cm long x-ray deformable mirror of super-polished single-crystal silicon that has 45 actuators along the tangential axis. After assembly the surface height error was 19 nm rms. With use of high-precision visible-light metrology and precise control algorithms, we have actuated the x-ray deformable mirror and flattened its entire surface to 0.7 nm rms controllable figure error. This is, to our knowledge, the first sub-nanometer active flattening of a substrate longer than 15 cm.","authors_text":"A. Brooks, B. Macintosh, D. Palmer, L. A. Poyneer, M. J. Pivovaroff, T. McCarville, T. Pardini","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-02-07T19:45:11Z","title":"Sub-nanometer flattening of a 45-cm long, 45-actuator x-ray deformable mirror"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1743","kind":"arxiv","version":2},"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":"sha256:597a0583a44d6264f804cfec2da85ca606d66655e1290fed0b704f6b214c98fc","target":"record","created_at":"2026-05-18T01:44:46Z","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":"6f38f74b5a91225d01e7cec17ce5239e9e421affc2f1f894eceab96d694ae62d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-02-07T19:45:11Z","title_canon_sha256":"c152f7e774ddb8803f0a8aba457f0675cc90a74bbc47980cb3f64ea48d0775c1"},"schema_version":"1.0","source":{"id":"1402.1743","kind":"arxiv","version":2}},"canonical_sha256":"208236af56cde7cd5b0e502d442a1a5bc914c7a8e975959421adf6b151256ee3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"208236af56cde7cd5b0e502d442a1a5bc914c7a8e975959421adf6b151256ee3","first_computed_at":"2026-05-18T01:44:46.339839Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:46.339839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x7GVlRUyDUCU/yBZVcQ89pRZ57sDLzAOcvEiClx8oZDxq1QZYmVyQvxZ3OB6eroGYkhNVPCYrX3Vo5CPI6BpDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:46.340309Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.1743","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:597a0583a44d6264f804cfec2da85ca606d66655e1290fed0b704f6b214c98fc","sha256:f95bf73c17b4cd61379af7f43bea9ed812f0fbc1d380cb7ffd8bb038d975b461"],"state_sha256":"5f0688fda896cbf21772f6a1866b6cc9ab55c5d3b63529cb5ff768d477d1d8d6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G/PLpdZoP/XY0UsJz1qGiHsRl56sPDfRim8HXrrPkcwyOTOPhrxDpbUl6iGUzFBQHLvURlmfVpuf3r6QA9WgDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:59:08.047393Z","bundle_sha256":"34d54bf79c0d8ddb7871ba9104e072eb4e099a2b18d1dd6259326f42ba8e6fee"}}