{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UBBOQAZROZCSKJEUQK2AUSVNCG","short_pith_number":"pith:UBBOQAZR","canonical_record":{"source":{"id":"1808.04255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-13T14:20:45Z","cross_cats_sorted":[],"title_canon_sha256":"51fd6297c610524981f29007d63071050551197259073fb5ff7c0ab01bdc6d90","abstract_canon_sha256":"2d440cb04b0bdf86dc95d1ad42e0de3ae218cd00c93c67b6260048011acd7bde"},"schema_version":"1.0"},"canonical_sha256":"a042e80331764525249482b40a4aad11b861993e0d8e85a406d450977c001be6","source":{"kind":"arxiv","id":"1808.04255","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.04255","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"arxiv_version","alias_value":"1808.04255v1","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04255","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"pith_short_12","alias_value":"UBBOQAZROZCS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UBBOQAZROZCSKJEU","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UBBOQAZR","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UBBOQAZROZCSKJEUQK2AUSVNCG","target":"record","payload":{"canonical_record":{"source":{"id":"1808.04255","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-13T14:20:45Z","cross_cats_sorted":[],"title_canon_sha256":"51fd6297c610524981f29007d63071050551197259073fb5ff7c0ab01bdc6d90","abstract_canon_sha256":"2d440cb04b0bdf86dc95d1ad42e0de3ae218cd00c93c67b6260048011acd7bde"},"schema_version":"1.0"},"canonical_sha256":"a042e80331764525249482b40a4aad11b861993e0d8e85a406d450977c001be6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:51.121533Z","signature_b64":"8BnhjWofw9LzA4lYyBOmBnuahUyHO10rn66K1IBUeECDpkfACUkg5dMeVamzrtOBoXrjPbkIVEtCSziN52zFAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a042e80331764525249482b40a4aad11b861993e0d8e85a406d450977c001be6","last_reissued_at":"2026-05-18T00:00:51.121124Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:51.121124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.04255","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":"2026-05-18T00:00:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jFS5HoyF+u+U6QMUNl+pDlGVgHSjmJhnN6FUAW4TLXvvLRPp1IyBI7tBgkcEHN/R6PJfxVnhesLmiyftvuFmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:27:48.341249Z"},"content_sha256":"6488fd2752d3bfa23b73126d26b9912dd981b06dc774643f9f2bf518aad1a5a2","schema_version":"1.0","event_id":"sha256:6488fd2752d3bfa23b73126d26b9912dd981b06dc774643f9f2bf518aad1a5a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UBBOQAZROZCSKJEUQK2AUSVNCG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detecting Weak Signals from Interfaces by High Accuracy Phase-Resolved SFG Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Martin Th\\\"amer, Martin Wolf, R. Kramer Campen","submitted_at":"2018-08-13T14:20:45Z","abstract_excerpt":"Much work over the last 25 years has demonstrated that the interface-specific, alloptical technique, vibrational sum frequency generation (v-SFG) spectroscopy, is often uniquely capable of characterizing the structure and dynamics of interfacial species. The desired information in such a measurement is the complex second order susceptibility which gives rise to the nonlinear response from interfacial molecules. The ability to detect molecular species yielding only small contributions to the susceptibility is meanwhile limited by the precision by which the spectral phase and amplitude can be de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04255","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":"2026-05-18T00:00:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E48fPZDuSYwKhxluiTyMjAHOX2Pktq1f4jMVoOJeDNjNuMlEmCA5dvtoYzEdAkM3RvZrYsZgIMsyCAhotDitDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:27:48.341664Z"},"content_sha256":"00d3702145749fcab7abd8b19ec0819f4695bc597a99e8dfb532fd248d417afe","schema_version":"1.0","event_id":"sha256:00d3702145749fcab7abd8b19ec0819f4695bc597a99e8dfb532fd248d417afe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/bundle.json","state_url":"https://pith.science/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/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":"2026-05-27T10:27:48Z","links":{"resolver":"https://pith.science/pith/UBBOQAZROZCSKJEUQK2AUSVNCG","bundle":"https://pith.science/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/bundle.json","state":"https://pith.science/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UBBOQAZROZCSKJEUQK2AUSVNCG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UBBOQAZROZCSKJEUQK2AUSVNCG","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":"2d440cb04b0bdf86dc95d1ad42e0de3ae218cd00c93c67b6260048011acd7bde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-13T14:20:45Z","title_canon_sha256":"51fd6297c610524981f29007d63071050551197259073fb5ff7c0ab01bdc6d90"},"schema_version":"1.0","source":{"id":"1808.04255","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.04255","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"arxiv_version","alias_value":"1808.04255v1","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04255","created_at":"2026-05-18T00:00:51Z"},{"alias_kind":"pith_short_12","alias_value":"UBBOQAZROZCS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UBBOQAZROZCSKJEU","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UBBOQAZR","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:00d3702145749fcab7abd8b19ec0819f4695bc597a99e8dfb532fd248d417afe","target":"graph","created_at":"2026-05-18T00:00:51Z","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":"Much work over the last 25 years has demonstrated that the interface-specific, alloptical technique, vibrational sum frequency generation (v-SFG) spectroscopy, is often uniquely capable of characterizing the structure and dynamics of interfacial species. The desired information in such a measurement is the complex second order susceptibility which gives rise to the nonlinear response from interfacial molecules. The ability to detect molecular species yielding only small contributions to the susceptibility is meanwhile limited by the precision by which the spectral phase and amplitude can be de","authors_text":"Martin Th\\\"amer, Martin Wolf, R. Kramer Campen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-13T14:20:45Z","title":"Detecting Weak Signals from Interfaces by High Accuracy Phase-Resolved SFG Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04255","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":"sha256:6488fd2752d3bfa23b73126d26b9912dd981b06dc774643f9f2bf518aad1a5a2","target":"record","created_at":"2026-05-18T00:00:51Z","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":"2d440cb04b0bdf86dc95d1ad42e0de3ae218cd00c93c67b6260048011acd7bde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-13T14:20:45Z","title_canon_sha256":"51fd6297c610524981f29007d63071050551197259073fb5ff7c0ab01bdc6d90"},"schema_version":"1.0","source":{"id":"1808.04255","kind":"arxiv","version":1}},"canonical_sha256":"a042e80331764525249482b40a4aad11b861993e0d8e85a406d450977c001be6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a042e80331764525249482b40a4aad11b861993e0d8e85a406d450977c001be6","first_computed_at":"2026-05-18T00:00:51.121124Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:51.121124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8BnhjWofw9LzA4lYyBOmBnuahUyHO10rn66K1IBUeECDpkfACUkg5dMeVamzrtOBoXrjPbkIVEtCSziN52zFAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:51.121533Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.04255","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6488fd2752d3bfa23b73126d26b9912dd981b06dc774643f9f2bf518aad1a5a2","sha256:00d3702145749fcab7abd8b19ec0819f4695bc597a99e8dfb532fd248d417afe"],"state_sha256":"36352d1cecc68140c563ea555e21b0ae23bdbfb2854856a7880b1960e877e8d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SoqaaYjwieakYrGz75g0Be23xumaH5fVcAOeZaD42TKQBsX3RMG5KS6HsYpkOxh8Aqd3eQbj2V8a6iwUqXM9Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:27:48.344292Z","bundle_sha256":"6684be67b037544ba10d4f1ba738b7c47def5ad5be7d14c6a258f326acb95471"}}