{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:5DRLZGO7YYMWZBN37IA6HRX4RU","short_pith_number":"pith:5DRLZGO7","canonical_record":{"source":{"id":"1611.00238","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2016-11-01T14:19:15Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"3fcc4c9a98db9771ed2003309710e82b70550118ba1385d62ad66c795adbb11b","abstract_canon_sha256":"3484501f1956d639f1fb00bb59d16e7bdfe3b6d71dfb6e734a6c4f77ec453ec0"},"schema_version":"1.0"},"canonical_sha256":"e8e2bc99dfc6196c85bbfa01e3c6fc8d14a2272422272fdf3aac6d91ddde791e","source":{"kind":"arxiv","id":"1611.00238","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.00238","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"1611.00238v1","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.00238","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"5DRLZGO7YYMW","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5DRLZGO7YYMWZBN3","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5DRLZGO7","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:5DRLZGO7YYMWZBN37IA6HRX4RU","target":"record","payload":{"canonical_record":{"source":{"id":"1611.00238","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2016-11-01T14:19:15Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"3fcc4c9a98db9771ed2003309710e82b70550118ba1385d62ad66c795adbb11b","abstract_canon_sha256":"3484501f1956d639f1fb00bb59d16e7bdfe3b6d71dfb6e734a6c4f77ec453ec0"},"schema_version":"1.0"},"canonical_sha256":"e8e2bc99dfc6196c85bbfa01e3c6fc8d14a2272422272fdf3aac6d91ddde791e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:41.204670Z","signature_b64":"17t8z9jaZpW2nitOgc9ZXK+S3CFFDRR/sbhFKQFAeLZCRCJnGn1GXu8XAcRiePb2O871M21GmXkj1Sf7z+1sDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8e2bc99dfc6196c85bbfa01e3c6fc8d14a2272422272fdf3aac6d91ddde791e","last_reissued_at":"2026-05-18T01:00:41.204288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:41.204288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.00238","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":"2026-05-18T01:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZpEsEd40LmjvnQ+/FsvrkDQvnj/ubk8CXAxAGlSXLGLJBZE/4PowvbXkvBIbTHa1PMzu+2m1r7f/8EuPQZcWBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:08:16.304174Z"},"content_sha256":"619056bb0db92c9fe242a27b5b1d8b4f91ba4cc3572024406a44093eca819b74","schema_version":"1.0","event_id":"sha256:619056bb0db92c9fe242a27b5b1d8b4f91ba4cc3572024406a44093eca819b74"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:5DRLZGO7YYMWZBN37IA6HRX4RU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optothermal nonlinearity of silica aerogel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"cond-mat.other","authors_text":"Adam Fleming, Andrea Di Falco, Claudio Conti, Maria Chiara Braidotti, Michiel C. Samuels, Silvia Gentilini","submitted_at":"2016-11-01T14:19:15Z","abstract_excerpt":"We report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical silica aerogels have nonlinear optical coefficient similar to that of glass $(\\simeq 10^{-12} $m$^2/$W), with negligible optical nonlinear absorption. The non\\-li\\-near coefficient can be increased to values in the range of $10^{-10} $m$^2/$W by embedding an absorbing dye in the aerogel. This value is one order of magnitude higher than that observed in the pure dye and in typical highly nonlinear materials like liquid crystals."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.00238","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":"2026-05-18T01:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"axP3s/4yBC8PxHp+UqMuA7zvQXBgCrb8vijteY0Umn94VwdOlUrN83ycuugcJn8yct7lQ6WIddzKsiTIIyTzAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:08:16.304986Z"},"content_sha256":"b582047f80774c2c2cee9d7c64ddf93e500d3d64a895e89339742485264451c5","schema_version":"1.0","event_id":"sha256:b582047f80774c2c2cee9d7c64ddf93e500d3d64a895e89339742485264451c5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/bundle.json","state_url":"https://pith.science/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/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":"2026-05-26T04:08:16Z","links":{"resolver":"https://pith.science/pith/5DRLZGO7YYMWZBN37IA6HRX4RU","bundle":"https://pith.science/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/bundle.json","state":"https://pith.science/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5DRLZGO7YYMWZBN37IA6HRX4RU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5DRLZGO7YYMWZBN37IA6HRX4RU","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":"3484501f1956d639f1fb00bb59d16e7bdfe3b6d71dfb6e734a6c4f77ec453ec0","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2016-11-01T14:19:15Z","title_canon_sha256":"3fcc4c9a98db9771ed2003309710e82b70550118ba1385d62ad66c795adbb11b"},"schema_version":"1.0","source":{"id":"1611.00238","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.00238","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"1611.00238v1","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.00238","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"5DRLZGO7YYMW","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5DRLZGO7YYMWZBN3","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5DRLZGO7","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:b582047f80774c2c2cee9d7c64ddf93e500d3d64a895e89339742485264451c5","target":"graph","created_at":"2026-05-18T01:00:41Z","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 report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical silica aerogels have nonlinear optical coefficient similar to that of glass $(\\simeq 10^{-12} $m$^2/$W), with negligible optical nonlinear absorption. The non\\-li\\-near coefficient can be increased to values in the range of $10^{-10} $m$^2/$W by embedding an absorbing dye in the aerogel. This value is one order of magnitude higher than that observed in the pure dye and in typical highly nonlinear materials like liquid crystals.","authors_text":"Adam Fleming, Andrea Di Falco, Claudio Conti, Maria Chiara Braidotti, Michiel C. Samuels, Silvia Gentilini","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2016-11-01T14:19:15Z","title":"Optothermal nonlinearity of silica aerogel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.00238","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":"sha256:619056bb0db92c9fe242a27b5b1d8b4f91ba4cc3572024406a44093eca819b74","target":"record","created_at":"2026-05-18T01:00:41Z","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":"3484501f1956d639f1fb00bb59d16e7bdfe3b6d71dfb6e734a6c4f77ec453ec0","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2016-11-01T14:19:15Z","title_canon_sha256":"3fcc4c9a98db9771ed2003309710e82b70550118ba1385d62ad66c795adbb11b"},"schema_version":"1.0","source":{"id":"1611.00238","kind":"arxiv","version":1}},"canonical_sha256":"e8e2bc99dfc6196c85bbfa01e3c6fc8d14a2272422272fdf3aac6d91ddde791e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8e2bc99dfc6196c85bbfa01e3c6fc8d14a2272422272fdf3aac6d91ddde791e","first_computed_at":"2026-05-18T01:00:41.204288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:00:41.204288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"17t8z9jaZpW2nitOgc9ZXK+S3CFFDRR/sbhFKQFAeLZCRCJnGn1GXu8XAcRiePb2O871M21GmXkj1Sf7z+1sDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:00:41.204670Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.00238","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:619056bb0db92c9fe242a27b5b1d8b4f91ba4cc3572024406a44093eca819b74","sha256:b582047f80774c2c2cee9d7c64ddf93e500d3d64a895e89339742485264451c5"],"state_sha256":"27c7535748f0fea306853d2fd7e32d6fdd95fe9e45e3d566bcaf81023115fc4b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zv/D5ghYbXkcjTLQEX/m2lvSpu9s+/ufPuo2hHWyU8fruk9hhZnmgDHneoxlmQGkolNP3MzHZLErC+NafduOBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:08:16.309916Z","bundle_sha256":"4c88344f23c121952dddbb16c92f2c62db4c581a26c2cb062b9dc16a6d496266"}}