{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZQ5Z6GD5JFDDPDYCBD3LQKQU24","short_pith_number":"pith:ZQ5Z6GD5","canonical_record":{"source":{"id":"1611.03996","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-11-12T13:17:20Z","cross_cats_sorted":[],"title_canon_sha256":"c08953284fa6cef55fd6a416170af19ab6799cfe4e232fecc926cf64b45c3745","abstract_canon_sha256":"a26f173c9daf35a5f14870bfce3ce2200a18f4abea5c46d52ec99835c5cf0017"},"schema_version":"1.0"},"canonical_sha256":"cc3b9f187d4946378f0208f6b82a14d726c35611c97f89a8161f216809adb7a2","source":{"kind":"arxiv","id":"1611.03996","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03996","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03996v1","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03996","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZQ5Z6GD5JFDD","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZQ5Z6GD5JFDDPDYC","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZQ5Z6GD5","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZQ5Z6GD5JFDDPDYCBD3LQKQU24","target":"record","payload":{"canonical_record":{"source":{"id":"1611.03996","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-11-12T13:17:20Z","cross_cats_sorted":[],"title_canon_sha256":"c08953284fa6cef55fd6a416170af19ab6799cfe4e232fecc926cf64b45c3745","abstract_canon_sha256":"a26f173c9daf35a5f14870bfce3ce2200a18f4abea5c46d52ec99835c5cf0017"},"schema_version":"1.0"},"canonical_sha256":"cc3b9f187d4946378f0208f6b82a14d726c35611c97f89a8161f216809adb7a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:13.931566Z","signature_b64":"H7NE5GcnxBLzXgTZfc/ASRjFg8sCPBAd4PR3Lf7YznDhIvvOV2JlBRv0YHNmBVhR08/zCb1F1kz/sn1IiwEfBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc3b9f187d4946378f0208f6b82a14d726c35611c97f89a8161f216809adb7a2","last_reissued_at":"2026-05-18T00:49:13.930844Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:13.930844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.03996","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":"2026-05-18T00:49:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eoeFta5DwZJnhfiiU0+QkZ+m6Bb6q8/r3U3nuDinQQHEa4iiY9djd39yBzl20gV2fo/Zfl78y6V6X1LBOI6LCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T19:25:16.781944Z"},"content_sha256":"cdc0cfce94bc201585defc3ef10fa9367f8f206aaff37046012aa07bdb9b7241","schema_version":"1.0","event_id":"sha256:cdc0cfce94bc201585defc3ef10fa9367f8f206aaff37046012aa07bdb9b7241"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZQ5Z6GD5JFDDPDYCBD3LQKQU24","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Statistical properties of a free-electron laser revealed by the Hanbury Brown and Twiss interferometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. Singer, D. Dzhigaev, F. Hieke, G. Brenner, G. Mercurio, I. A. Vartanyants, I. Zaluzhnyy, M. Rose, N. Gerasimova, O. Yu. Gorobtsov, P. Skopintsev, R.P. Kurta, S. Lazarev, U. Lorenz, W. Wurth","submitted_at":"2016-11-12T13:17:20Z","abstract_excerpt":"We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission (SASE) free-electron laser (FEL) FLASH at DESY in Hamburg by means of Hanbury Brown and Twiss (HBT) interferometry. The experiments were performed at the FEL wavelengths of 5.5 nm, 13.4 nm, and 20.8 nm. We determined the 2-nd order intensity correlation function for all wavelengths and different operation conditions of FLASH. In all experiments a high degree of spatial coherence (above 50%) was obtained. Our analysis performed in spatial and spectral domains provided us with th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03996","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":"2026-05-18T00:49:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8xxMd0M2xfbb+mK6Klv+JaryYyit2wGGTp1/9OnqDm7tb9ImGZ6Ex+/TLZqe81BDRyJ0Vn9/ct+kzZPSR/hqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T19:25:16.782660Z"},"content_sha256":"9228b006d9ed39e18c2b139a98bcd6c18363bd643b4494d5439bedc756ecfb92","schema_version":"1.0","event_id":"sha256:9228b006d9ed39e18c2b139a98bcd6c18363bd643b4494d5439bedc756ecfb92"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/bundle.json","state_url":"https://pith.science/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/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":"2026-05-29T19:25:16Z","links":{"resolver":"https://pith.science/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24","bundle":"https://pith.science/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/bundle.json","state":"https://pith.science/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZQ5Z6GD5JFDDPDYCBD3LQKQU24/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZQ5Z6GD5JFDDPDYCBD3LQKQU24","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":"a26f173c9daf35a5f14870bfce3ce2200a18f4abea5c46d52ec99835c5cf0017","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-11-12T13:17:20Z","title_canon_sha256":"c08953284fa6cef55fd6a416170af19ab6799cfe4e232fecc926cf64b45c3745"},"schema_version":"1.0","source":{"id":"1611.03996","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03996","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03996v1","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03996","created_at":"2026-05-18T00:49:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZQ5Z6GD5JFDD","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZQ5Z6GD5JFDDPDYC","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZQ5Z6GD5","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:9228b006d9ed39e18c2b139a98bcd6c18363bd643b4494d5439bedc756ecfb92","target":"graph","created_at":"2026-05-18T00:49:13Z","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 a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission (SASE) free-electron laser (FEL) FLASH at DESY in Hamburg by means of Hanbury Brown and Twiss (HBT) interferometry. The experiments were performed at the FEL wavelengths of 5.5 nm, 13.4 nm, and 20.8 nm. We determined the 2-nd order intensity correlation function for all wavelengths and different operation conditions of FLASH. In all experiments a high degree of spatial coherence (above 50%) was obtained. Our analysis performed in spatial and spectral domains provided us with th","authors_text":"A. Singer, D. Dzhigaev, F. Hieke, G. Brenner, G. Mercurio, I. A. Vartanyants, I. Zaluzhnyy, M. Rose, N. Gerasimova, O. Yu. Gorobtsov, P. Skopintsev, R.P. Kurta, S. Lazarev, U. Lorenz, W. Wurth","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-11-12T13:17:20Z","title":"Statistical properties of a free-electron laser revealed by the Hanbury Brown and Twiss interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03996","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:cdc0cfce94bc201585defc3ef10fa9367f8f206aaff37046012aa07bdb9b7241","target":"record","created_at":"2026-05-18T00:49:13Z","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":"a26f173c9daf35a5f14870bfce3ce2200a18f4abea5c46d52ec99835c5cf0017","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-11-12T13:17:20Z","title_canon_sha256":"c08953284fa6cef55fd6a416170af19ab6799cfe4e232fecc926cf64b45c3745"},"schema_version":"1.0","source":{"id":"1611.03996","kind":"arxiv","version":1}},"canonical_sha256":"cc3b9f187d4946378f0208f6b82a14d726c35611c97f89a8161f216809adb7a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc3b9f187d4946378f0208f6b82a14d726c35611c97f89a8161f216809adb7a2","first_computed_at":"2026-05-18T00:49:13.930844Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:13.930844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H7NE5GcnxBLzXgTZfc/ASRjFg8sCPBAd4PR3Lf7YznDhIvvOV2JlBRv0YHNmBVhR08/zCb1F1kz/sn1IiwEfBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:13.931566Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.03996","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cdc0cfce94bc201585defc3ef10fa9367f8f206aaff37046012aa07bdb9b7241","sha256:9228b006d9ed39e18c2b139a98bcd6c18363bd643b4494d5439bedc756ecfb92"],"state_sha256":"a572e9e89cd563e12330bef4d6e6166744686759a5e43b85fc126dd9fd3f77c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TV/TVQKMzZ7WlkdasID0URs1bP2amvqvInG+m+JAeyo6d70ktFApvV1D9uefU+8h/4Y/drZTzrr/9RwpFmejBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T19:25:16.786552Z","bundle_sha256":"1db330a70112b10e7ad783a307ac55f657f719f2e356b30ad256e2ce13ed9b19"}}