{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FSFAMEGVI3WPTTMKK5U5CIUETV","short_pith_number":"pith:FSFAMEGV","canonical_record":{"source":{"id":"1903.02824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-03-07T10:50:46Z","cross_cats_sorted":[],"title_canon_sha256":"f2a162afdf53626d6612dd6ceeeab68b005c8a14f0494f236b1536645976e6e9","abstract_canon_sha256":"39999f24d30b202a9a5709a4bf8f0b8b92505ade0ca12927859051f37a90e272"},"schema_version":"1.0"},"canonical_sha256":"2c8a0610d546ecf9cd8a5769d122849d54d150373ff981e783b423abed4691f7","source":{"kind":"arxiv","id":"1903.02824","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02824","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02824v1","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02824","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"pith_short_12","alias_value":"FSFAMEGVI3WP","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FSFAMEGVI3WPTTMK","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FSFAMEGV","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FSFAMEGVI3WPTTMKK5U5CIUETV","target":"record","payload":{"canonical_record":{"source":{"id":"1903.02824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-03-07T10:50:46Z","cross_cats_sorted":[],"title_canon_sha256":"f2a162afdf53626d6612dd6ceeeab68b005c8a14f0494f236b1536645976e6e9","abstract_canon_sha256":"39999f24d30b202a9a5709a4bf8f0b8b92505ade0ca12927859051f37a90e272"},"schema_version":"1.0"},"canonical_sha256":"2c8a0610d546ecf9cd8a5769d122849d54d150373ff981e783b423abed4691f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:51.018157Z","signature_b64":"XUww2eqBvQJBNuZuz5KDRE/eAvFr/OXCdM2g8D4OOI138vdwI8ArCcJ8koqda7A1rXAqjfrJC3j5IttpRDQeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2c8a0610d546ecf9cd8a5769d122849d54d150373ff981e783b423abed4691f7","last_reissued_at":"2026-05-17T23:51:51.017497Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:51.017497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.02824","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":"2026-05-17T23:51:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cL7xV49HiIS4BiGUDYiHrXOIKTXNLdEb2CtIt03Sh1H0/JIUutA808BsyaQMs+jSw4/lvTXOLFjfFBuerhFuBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T20:24:21.129648Z"},"content_sha256":"449f726d6671af2887602d2d72c9132320aeb79cbd3f55ba550437afd6fdecc0","schema_version":"1.0","event_id":"sha256:449f726d6671af2887602d2d72c9132320aeb79cbd3f55ba550437afd6fdecc0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FSFAMEGVI3WPTTMKK5U5CIUETV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multiple Fourier Component Analysis of X-ray Second Harmonic Generation in Diamond","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"B.Kettle, B.Senfftleben, C.Weninger, D.A.Reis, D.Zhu, H.Liu, J.B.Hastings, M.Fuchs, P.Chakraborti, P.H.Bucksbaum, S.Ghimire, S.Nelson, S. Shwartz, S.W.Teitelbaum, T.Sato, Y.Sun","submitted_at":"2019-03-07T10:50:46Z","abstract_excerpt":"The unprecedented brilliance of X-ray free-electron lasers (XFELs) [1, 2] has enabled first studies of nonlinear interactions in the hard X-ray range. In particular, X-ray-optical mixing [3], X-ray second harmonic generation (XSHG) [4] and nonlinear Compton scattering (NLCS) [5] have been recently observed for the first time using XFELs. The former two experiments as well as X-ray parametric downconversion (XPDC)[6, 7] are well explained by nonlinearities in the impulse approximation[8], where electrons in a solid target are assumed to be quasi free for X-ray interactions far from atomic reson"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02824","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":"2026-05-17T23:51:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qz4spT490svMObVdERChVvMwn+Y1sG+2XsV4XR1Bj0zovoDlSa8KjtyEzA/bxrwEEQMF9rmdJm7nJoq7/lF3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T20:24:21.130223Z"},"content_sha256":"05a7b48214b88c4699bf346fb2d1ee3d169449ed97e13edca57fa87975b17aff","schema_version":"1.0","event_id":"sha256:05a7b48214b88c4699bf346fb2d1ee3d169449ed97e13edca57fa87975b17aff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/bundle.json","state_url":"https://pith.science/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/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":"2026-05-20T20:24:21Z","links":{"resolver":"https://pith.science/pith/FSFAMEGVI3WPTTMKK5U5CIUETV","bundle":"https://pith.science/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/bundle.json","state":"https://pith.science/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FSFAMEGVI3WPTTMKK5U5CIUETV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FSFAMEGVI3WPTTMKK5U5CIUETV","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":"39999f24d30b202a9a5709a4bf8f0b8b92505ade0ca12927859051f37a90e272","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-03-07T10:50:46Z","title_canon_sha256":"f2a162afdf53626d6612dd6ceeeab68b005c8a14f0494f236b1536645976e6e9"},"schema_version":"1.0","source":{"id":"1903.02824","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02824","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02824v1","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02824","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"pith_short_12","alias_value":"FSFAMEGVI3WP","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FSFAMEGVI3WPTTMK","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FSFAMEGV","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:05a7b48214b88c4699bf346fb2d1ee3d169449ed97e13edca57fa87975b17aff","target":"graph","created_at":"2026-05-17T23:51:51Z","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 unprecedented brilliance of X-ray free-electron lasers (XFELs) [1, 2] has enabled first studies of nonlinear interactions in the hard X-ray range. In particular, X-ray-optical mixing [3], X-ray second harmonic generation (XSHG) [4] and nonlinear Compton scattering (NLCS) [5] have been recently observed for the first time using XFELs. The former two experiments as well as X-ray parametric downconversion (XPDC)[6, 7] are well explained by nonlinearities in the impulse approximation[8], where electrons in a solid target are assumed to be quasi free for X-ray interactions far from atomic reson","authors_text":"B.Kettle, B.Senfftleben, C.Weninger, D.A.Reis, D.Zhu, H.Liu, J.B.Hastings, M.Fuchs, P.Chakraborti, P.H.Bucksbaum, S.Ghimire, S.Nelson, S. Shwartz, S.W.Teitelbaum, T.Sato, Y.Sun","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-03-07T10:50:46Z","title":"Multiple Fourier Component Analysis of X-ray Second Harmonic Generation in Diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02824","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":"sha256:449f726d6671af2887602d2d72c9132320aeb79cbd3f55ba550437afd6fdecc0","target":"record","created_at":"2026-05-17T23:51:51Z","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":"39999f24d30b202a9a5709a4bf8f0b8b92505ade0ca12927859051f37a90e272","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-03-07T10:50:46Z","title_canon_sha256":"f2a162afdf53626d6612dd6ceeeab68b005c8a14f0494f236b1536645976e6e9"},"schema_version":"1.0","source":{"id":"1903.02824","kind":"arxiv","version":1}},"canonical_sha256":"2c8a0610d546ecf9cd8a5769d122849d54d150373ff981e783b423abed4691f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c8a0610d546ecf9cd8a5769d122849d54d150373ff981e783b423abed4691f7","first_computed_at":"2026-05-17T23:51:51.017497Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:51.017497Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XUww2eqBvQJBNuZuz5KDRE/eAvFr/OXCdM2g8D4OOI138vdwI8ArCcJ8koqda7A1rXAqjfrJC3j5IttpRDQeBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:51.018157Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.02824","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:449f726d6671af2887602d2d72c9132320aeb79cbd3f55ba550437afd6fdecc0","sha256:05a7b48214b88c4699bf346fb2d1ee3d169449ed97e13edca57fa87975b17aff"],"state_sha256":"18dfb3ee62758ba9fc8a6b5dd6d0bc8707dc39ddfd5bf53833beda7428f75a37"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ikyZpAp6Oj16xwABLGpBM6IhPlh2HdLaLVaq+7OZ5e4OWhfAsfuJ8CJmEVWbwX0r1yNfSZqYeD6WxLAdBD9nBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T20:24:21.133371Z","bundle_sha256":"99dd39b22dfc0c2cf6c398109e582e91e8e931341f8dbca1b7d854dac91a4c3d"}}