{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:EUQCWAVGC4TQD7VR4DXYXFD7VA","short_pith_number":"pith:EUQCWAVG","canonical_record":{"source":{"id":"1906.09974","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-21T15:34:13Z","cross_cats_sorted":[],"title_canon_sha256":"f2270158fce62dba98714f00fcfdb0541c0a462f327a672a9e67780aa8003535","abstract_canon_sha256":"0fd4cb67f69607382ffdbe2cc2e06a744262782423e68e63909191942257c42b"},"schema_version":"1.0"},"canonical_sha256":"25202b02a6172701feb1e0ef8b947fa83b36bd641dc519ba1e37d34c3526d664","source":{"kind":"arxiv","id":"1906.09974","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09974","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09974v1","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09974","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"pith_short_12","alias_value":"EUQCWAVGC4TQ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EUQCWAVGC4TQD7VR","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EUQCWAVG","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:EUQCWAVGC4TQD7VR4DXYXFD7VA","target":"record","payload":{"canonical_record":{"source":{"id":"1906.09974","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-21T15:34:13Z","cross_cats_sorted":[],"title_canon_sha256":"f2270158fce62dba98714f00fcfdb0541c0a462f327a672a9e67780aa8003535","abstract_canon_sha256":"0fd4cb67f69607382ffdbe2cc2e06a744262782423e68e63909191942257c42b"},"schema_version":"1.0"},"canonical_sha256":"25202b02a6172701feb1e0ef8b947fa83b36bd641dc519ba1e37d34c3526d664","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:35.888639Z","signature_b64":"3hA0cXXXphdOfKTKS0g6ayeBVy+tEbPR7qveV59zEQmDBlxxHUoNbaFykGN4FYoE1tYKl0Ao1Fe907QinVh3Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25202b02a6172701feb1e0ef8b947fa83b36bd641dc519ba1e37d34c3526d664","last_reissued_at":"2026-05-17T23:42:35.887828Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:35.887828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.09974","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":"2026-05-17T23:42:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kCv31i6Kt69QaruJ1TabX3SZoQUmS04S0JFM6PaWDpWBDuKLWTPX+lL7mAuCSTOl3XHzYti9vQJwSde2vabaDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:09:43.975253Z"},"content_sha256":"17b7ebffcb222548c1e97b677074bd1c4d6fdbf5c901d46f9bb741e3b1b570bd","schema_version":"1.0","event_id":"sha256:17b7ebffcb222548c1e97b677074bd1c4d6fdbf5c901d46f9bb741e3b1b570bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:EUQCWAVGC4TQD7VR4DXYXFD7VA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Overview of the High-Definition X-ray Imager instrument on the Lynx x-ray surveyor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Abraham D. Falcone, Doug A. Swartz (for the Lynx Science, Jessica A. Gaskin, John A. Mulqueen, Marshall W. Bautz, Ralph P. Kraft, Technology Definition Team)","submitted_at":"2019-06-21T15:34:13Z","abstract_excerpt":"Four NASA Science and Technology Definition Teams have been convened in order to develop and study four mission concepts to be evaluated by the upcoming 2020 Decadal Survey. The Lynx x-ray surveyor mission is one of these four large missions. Lynx will couple fine angular resolution (<0.5 arcsec HPD) x-ray optics with large effective area (~2 m^2 at 1 keV), thus enabling exploration within a unique scientific parameter space. One of the primary soft x-ray imaging instruments being baselined for this mission concept is the high-definition x-ray imager, HDXI. This instrument would use a finely p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09974","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":"2026-05-17T23:42:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4ed5lvgzgFRsWzlUbtHJC82X7Xmrzt7qt6wNjbYDk2MqcOxJJH88aZX4ETljY/C37tRq4dGPtVWMI5ze5EqpAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:09:43.975933Z"},"content_sha256":"f2f9dc8e71ada37399a869a139115bcb5f3d58b6e12eae47eb76fe9fd4285c45","schema_version":"1.0","event_id":"sha256:f2f9dc8e71ada37399a869a139115bcb5f3d58b6e12eae47eb76fe9fd4285c45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/bundle.json","state_url":"https://pith.science/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/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":"2026-05-27T10:09:43Z","links":{"resolver":"https://pith.science/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA","bundle":"https://pith.science/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/bundle.json","state":"https://pith.science/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EUQCWAVGC4TQD7VR4DXYXFD7VA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EUQCWAVGC4TQD7VR4DXYXFD7VA","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":"0fd4cb67f69607382ffdbe2cc2e06a744262782423e68e63909191942257c42b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-21T15:34:13Z","title_canon_sha256":"f2270158fce62dba98714f00fcfdb0541c0a462f327a672a9e67780aa8003535"},"schema_version":"1.0","source":{"id":"1906.09974","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09974","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09974v1","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09974","created_at":"2026-05-17T23:42:35Z"},{"alias_kind":"pith_short_12","alias_value":"EUQCWAVGC4TQ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EUQCWAVGC4TQD7VR","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EUQCWAVG","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:f2f9dc8e71ada37399a869a139115bcb5f3d58b6e12eae47eb76fe9fd4285c45","target":"graph","created_at":"2026-05-17T23:42:35Z","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":"Four NASA Science and Technology Definition Teams have been convened in order to develop and study four mission concepts to be evaluated by the upcoming 2020 Decadal Survey. The Lynx x-ray surveyor mission is one of these four large missions. Lynx will couple fine angular resolution (<0.5 arcsec HPD) x-ray optics with large effective area (~2 m^2 at 1 keV), thus enabling exploration within a unique scientific parameter space. One of the primary soft x-ray imaging instruments being baselined for this mission concept is the high-definition x-ray imager, HDXI. This instrument would use a finely p","authors_text":"Abraham D. Falcone, Doug A. Swartz (for the Lynx Science, Jessica A. Gaskin, John A. Mulqueen, Marshall W. Bautz, Ralph P. Kraft, Technology Definition Team)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-21T15:34:13Z","title":"Overview of the High-Definition X-ray Imager instrument on the Lynx x-ray surveyor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09974","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":"sha256:17b7ebffcb222548c1e97b677074bd1c4d6fdbf5c901d46f9bb741e3b1b570bd","target":"record","created_at":"2026-05-17T23:42:35Z","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":"0fd4cb67f69607382ffdbe2cc2e06a744262782423e68e63909191942257c42b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-21T15:34:13Z","title_canon_sha256":"f2270158fce62dba98714f00fcfdb0541c0a462f327a672a9e67780aa8003535"},"schema_version":"1.0","source":{"id":"1906.09974","kind":"arxiv","version":1}},"canonical_sha256":"25202b02a6172701feb1e0ef8b947fa83b36bd641dc519ba1e37d34c3526d664","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25202b02a6172701feb1e0ef8b947fa83b36bd641dc519ba1e37d34c3526d664","first_computed_at":"2026-05-17T23:42:35.887828Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:35.887828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3hA0cXXXphdOfKTKS0g6ayeBVy+tEbPR7qveV59zEQmDBlxxHUoNbaFykGN4FYoE1tYKl0Ao1Fe907QinVh3Dg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:35.888639Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.09974","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17b7ebffcb222548c1e97b677074bd1c4d6fdbf5c901d46f9bb741e3b1b570bd","sha256:f2f9dc8e71ada37399a869a139115bcb5f3d58b6e12eae47eb76fe9fd4285c45"],"state_sha256":"2f9b2731285abf60139bd711ea21dec329d34618c179e39240fa16037e8d4d4b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7A6crt2v74dzZdzxLnaljfHFcIggPpjJelPYpRSMNiFiVtR+dnCR800CG4CLGI4ixb5Lmd+iWPmC//NsbnOXBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:09:43.979660Z","bundle_sha256":"35499e1b0260d3d3ec3b4798b5d7cae50ba9a5747211888c76bbf585869ff03d"}}