{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:PMN5IGSLGFEZ22FDHAYBZQWVCZ","short_pith_number":"pith:PMN5IGSL","canonical_record":{"source":{"id":"1704.04246","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-04-13T18:19:26Z","cross_cats_sorted":[],"title_canon_sha256":"4ab3df6e6124c156d1eae5f679c8c507933d36dbded00f29a359ab9cbe90e065","abstract_canon_sha256":"7eb9016464b1dac3a36ec11b1f2ec44dcbdca37201ea3d527a5b001761699284"},"schema_version":"1.0"},"canonical_sha256":"7b1bd41a4b31499d68a338301cc2d5164bc1d521cb1b6fa6716e1b256c74e48b","source":{"kind":"arxiv","id":"1704.04246","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.04246","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"arxiv_version","alias_value":"1704.04246v2","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.04246","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"pith_short_12","alias_value":"PMN5IGSLGFEZ","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PMN5IGSLGFEZ22FD","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PMN5IGSL","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:PMN5IGSLGFEZ22FDHAYBZQWVCZ","target":"record","payload":{"canonical_record":{"source":{"id":"1704.04246","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-04-13T18:19:26Z","cross_cats_sorted":[],"title_canon_sha256":"4ab3df6e6124c156d1eae5f679c8c507933d36dbded00f29a359ab9cbe90e065","abstract_canon_sha256":"7eb9016464b1dac3a36ec11b1f2ec44dcbdca37201ea3d527a5b001761699284"},"schema_version":"1.0"},"canonical_sha256":"7b1bd41a4b31499d68a338301cc2d5164bc1d521cb1b6fa6716e1b256c74e48b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:38:55.522578Z","signature_b64":"UoLY9uy38rSnvokbgntOL7gXQHhqlpAkycUClY4mtgV/av6wiLRyo3s/ACEIqkCwJmtM0DXw0VazpxbQ6K4ABQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b1bd41a4b31499d68a338301cc2d5164bc1d521cb1b6fa6716e1b256c74e48b","last_reissued_at":"2026-05-18T00:38:55.521953Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:38:55.521953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.04246","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":"2026-05-18T00:38:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iPwkCz/Ch99d68zNPEBxl6yJhxy17DgALC7hf/nZXtTXrRWF6PplWCrk4pcyF6c7qZo7VxqgsHfUltfX28GkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T16:54:11.825187Z"},"content_sha256":"1a81fa282424a0cff9ae2eea67bd41d1210fa569bc6bb1b31d7b9362be0b9f6c","schema_version":"1.0","event_id":"sha256:1a81fa282424a0cff9ae2eea67bd41d1210fa569bc6bb1b31d7b9362be0b9f6c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:PMN5IGSLGFEZ22FDHAYBZQWVCZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-temporal-resolution electron microscopy for imaging ultrafast electron dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. H. Zewail, B. Liao, J. S. Baskin, M. Th. Hassan","submitted_at":"2017-04-13T18:19:26Z","abstract_excerpt":"Ultrafast Electron Microscopy (UEM) has been demonstrated to be an effective table-top technique for imaging the temporally-evolving dynamics of matter with subparticle spatial resolution on the time scale of atomic motion. However, imaging the faster motion of electron dynamics in real time has remained beyond reach. Here, we demonstrate more than an order of magnitude (16 times) enhancement in the typical temporal resolution of UEM by generating isolated 30 fs electron pulses, accelerated at 200 keV, via the optical-gating approach, with sufficient intensity for efficiently probing the elect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.04246","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":"2026-05-18T00:38:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uXUOP9J+TCPfEAYBAGys/mWN476HzVS5cPfLbblJ7NPTBYhkpDR7Bmo0t/2StJZB8G6+0NGu5APLmtmxKyhCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T16:54:11.825567Z"},"content_sha256":"74e1fbb7e94b4257fe53725a6e9a9eb30c42f88041e1e7174fcbec607e1b65ab","schema_version":"1.0","event_id":"sha256:74e1fbb7e94b4257fe53725a6e9a9eb30c42f88041e1e7174fcbec607e1b65ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/bundle.json","state_url":"https://pith.science/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/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":"2026-06-04T16:54:11Z","links":{"resolver":"https://pith.science/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ","bundle":"https://pith.science/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/bundle.json","state":"https://pith.science/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PMN5IGSLGFEZ22FDHAYBZQWVCZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PMN5IGSLGFEZ22FDHAYBZQWVCZ","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":"7eb9016464b1dac3a36ec11b1f2ec44dcbdca37201ea3d527a5b001761699284","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-04-13T18:19:26Z","title_canon_sha256":"4ab3df6e6124c156d1eae5f679c8c507933d36dbded00f29a359ab9cbe90e065"},"schema_version":"1.0","source":{"id":"1704.04246","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.04246","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"arxiv_version","alias_value":"1704.04246v2","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.04246","created_at":"2026-05-18T00:38:55Z"},{"alias_kind":"pith_short_12","alias_value":"PMN5IGSLGFEZ","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PMN5IGSLGFEZ22FD","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PMN5IGSL","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:74e1fbb7e94b4257fe53725a6e9a9eb30c42f88041e1e7174fcbec607e1b65ab","target":"graph","created_at":"2026-05-18T00:38:55Z","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":"Ultrafast Electron Microscopy (UEM) has been demonstrated to be an effective table-top technique for imaging the temporally-evolving dynamics of matter with subparticle spatial resolution on the time scale of atomic motion. However, imaging the faster motion of electron dynamics in real time has remained beyond reach. Here, we demonstrate more than an order of magnitude (16 times) enhancement in the typical temporal resolution of UEM by generating isolated 30 fs electron pulses, accelerated at 200 keV, via the optical-gating approach, with sufficient intensity for efficiently probing the elect","authors_text":"A. H. Zewail, B. Liao, J. S. Baskin, M. Th. Hassan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-04-13T18:19:26Z","title":"High-temporal-resolution electron microscopy for imaging ultrafast electron dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.04246","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":"sha256:1a81fa282424a0cff9ae2eea67bd41d1210fa569bc6bb1b31d7b9362be0b9f6c","target":"record","created_at":"2026-05-18T00:38:55Z","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":"7eb9016464b1dac3a36ec11b1f2ec44dcbdca37201ea3d527a5b001761699284","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-04-13T18:19:26Z","title_canon_sha256":"4ab3df6e6124c156d1eae5f679c8c507933d36dbded00f29a359ab9cbe90e065"},"schema_version":"1.0","source":{"id":"1704.04246","kind":"arxiv","version":2}},"canonical_sha256":"7b1bd41a4b31499d68a338301cc2d5164bc1d521cb1b6fa6716e1b256c74e48b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b1bd41a4b31499d68a338301cc2d5164bc1d521cb1b6fa6716e1b256c74e48b","first_computed_at":"2026-05-18T00:38:55.521953Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:38:55.521953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UoLY9uy38rSnvokbgntOL7gXQHhqlpAkycUClY4mtgV/av6wiLRyo3s/ACEIqkCwJmtM0DXw0VazpxbQ6K4ABQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:38:55.522578Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.04246","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a81fa282424a0cff9ae2eea67bd41d1210fa569bc6bb1b31d7b9362be0b9f6c","sha256:74e1fbb7e94b4257fe53725a6e9a9eb30c42f88041e1e7174fcbec607e1b65ab"],"state_sha256":"6ec804b31c3f13837a5ccc056eccf9f492db26d6a8597ee118854a38fc58fd26"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9PLNo0JuonKBpeE5q2OYFTMsfx2ASCj4/0LDRu41ZevYrC+uuguky8xqye+6My2GCXCGVwH6KtJr5NSodhMDDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T16:54:11.827587Z","bundle_sha256":"4dff1b2a6d66beee0cdd1a2913bc645e5b798c0c13113225a00218ae9af6eec7"}}