{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:3BL4P5A2ZKDBQAYDMRKXY4CUN7","short_pith_number":"pith:3BL4P5A2","canonical_record":{"source":{"id":"gr-qc/0202038","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-12T06:17:55Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"e3ddfd7b0f391b9601050671dbe12355572944c6202f01ca54ffbd378e36d1e0","abstract_canon_sha256":"c7a64a74574d5b3d7091e31a7a826b85514ea98661452d808d8354c18e2eae65"},"schema_version":"1.0"},"canonical_sha256":"d857c7f41aca8618030364557c70546fcecb65ecd783d0c98feae92cdf6a9547","source":{"kind":"arxiv","id":"gr-qc/0202038","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0202038","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0202038v1","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0202038","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_12","alias_value":"3BL4P5A2ZKDB","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_16","alias_value":"3BL4P5A2ZKDBQAYD","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_8","alias_value":"3BL4P5A2","created_at":"2026-07-04T16:33:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:3BL4P5A2ZKDBQAYDMRKXY4CUN7","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0202038","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-12T06:17:55Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"e3ddfd7b0f391b9601050671dbe12355572944c6202f01ca54ffbd378e36d1e0","abstract_canon_sha256":"c7a64a74574d5b3d7091e31a7a826b85514ea98661452d808d8354c18e2eae65"},"schema_version":"1.0"},"canonical_sha256":"d857c7f41aca8618030364557c70546fcecb65ecd783d0c98feae92cdf6a9547","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:33:41.779679Z","signature_b64":"IliWm0UWiGvw+gyPl+meXufjqzpLlnwwbK5wedQnMdwsYDaV5cwSGSS4++WxfSvakNCyCwkw4RLTLN0+0N5HBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d857c7f41aca8618030364557c70546fcecb65ecd783d0c98feae92cdf6a9547","last_reissued_at":"2026-07-04T16:33:41.779261Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:33:41.779261Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0202038","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":"2026-07-04T16:33:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"biP5QDslmns7WmYbEhRn9nmCneZGAy+ZmfjnxaiaGCjeEjzShernS1yVqxW+vF2YjnqjzxORqy3HHWi55DVODQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:20:14.282525Z"},"content_sha256":"bd06120c46b9c2a6376c61c4b8a1c04958e1194248eee8302fb475164f37cff7","schema_version":"1.0","event_id":"sha256:bd06120c46b9c2a6376c61c4b8a1c04958e1194248eee8302fb475164f37cff7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:3BL4P5A2ZKDBQAYDMRKXY4CUN7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal lensing in cryogenic sapphire substrates","license":"","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"gr-qc","authors_text":"Akira Yamamoto, C.T. Taylor, Kazuaki Kuroda, Masatake Ohashi, Shinji Miyoki, Takakazu Shintomi, Takashi Uchiyama, Takayuki Tomaru, Toshikazu Suzuki","submitted_at":"2002-02-12T06:17:55Z","abstract_excerpt":"We report the reduction of the thermal lensing in cryogenic sapphire mirrors, which is planed to be used in the Large scale Cryogenic Gravitational wave Telescope (LCGT) project. We measured three key parameters of sapphire substrate for thermal lensing at cryogenic temperature. They are optical absorption coefficient, thermal conductivity and temperature coefficient of refractive index at cryogenic temperature. On basis of these measurements, we estimated the shot noise sensitivity of the interferometer with thermal lensing by using a wave-front tracing simulation. We found that thermal lensi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0202038","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/gr-qc/0202038/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:33:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U3h324OeyHRI/pyGJ6TOl9Af6+cuKxEivYdWJQB2vd8rx/5rEuB4tq23qX4WgHp3QV2M8BaYAjs2xkpfg8l7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:20:14.282898Z"},"content_sha256":"4f187067be83870a17af91cac03245c39bbde715ea2f59b840edece4cd5bf132","schema_version":"1.0","event_id":"sha256:4f187067be83870a17af91cac03245c39bbde715ea2f59b840edece4cd5bf132"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/bundle.json","state_url":"https://pith.science/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/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":"2026-07-05T07:20:14Z","links":{"resolver":"https://pith.science/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7","bundle":"https://pith.science/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/bundle.json","state":"https://pith.science/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3BL4P5A2ZKDBQAYDMRKXY4CUN7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:3BL4P5A2ZKDBQAYDMRKXY4CUN7","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":"c7a64a74574d5b3d7091e31a7a826b85514ea98661452d808d8354c18e2eae65","cross_cats_sorted":["physics.ins-det"],"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-12T06:17:55Z","title_canon_sha256":"e3ddfd7b0f391b9601050671dbe12355572944c6202f01ca54ffbd378e36d1e0"},"schema_version":"1.0","source":{"id":"gr-qc/0202038","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0202038","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0202038v1","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0202038","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_12","alias_value":"3BL4P5A2ZKDB","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_16","alias_value":"3BL4P5A2ZKDBQAYD","created_at":"2026-07-04T16:33:41Z"},{"alias_kind":"pith_short_8","alias_value":"3BL4P5A2","created_at":"2026-07-04T16:33:41Z"}],"graph_snapshots":[{"event_id":"sha256:4f187067be83870a17af91cac03245c39bbde715ea2f59b840edece4cd5bf132","target":"graph","created_at":"2026-07-04T16:33:41Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/gr-qc/0202038/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the reduction of the thermal lensing in cryogenic sapphire mirrors, which is planed to be used in the Large scale Cryogenic Gravitational wave Telescope (LCGT) project. We measured three key parameters of sapphire substrate for thermal lensing at cryogenic temperature. They are optical absorption coefficient, thermal conductivity and temperature coefficient of refractive index at cryogenic temperature. On basis of these measurements, we estimated the shot noise sensitivity of the interferometer with thermal lensing by using a wave-front tracing simulation. We found that thermal lensi","authors_text":"Akira Yamamoto, C.T. Taylor, Kazuaki Kuroda, Masatake Ohashi, Shinji Miyoki, Takakazu Shintomi, Takashi Uchiyama, Takayuki Tomaru, Toshikazu Suzuki","cross_cats":["physics.ins-det"],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2002-02-12T06:17:55Z","title":"Thermal lensing in cryogenic sapphire substrates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0202038","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:bd06120c46b9c2a6376c61c4b8a1c04958e1194248eee8302fb475164f37cff7","target":"record","created_at":"2026-07-04T16:33:41Z","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":"c7a64a74574d5b3d7091e31a7a826b85514ea98661452d808d8354c18e2eae65","cross_cats_sorted":["physics.ins-det"],"license":"","primary_cat":"gr-qc","submitted_at":"2002-02-12T06:17:55Z","title_canon_sha256":"e3ddfd7b0f391b9601050671dbe12355572944c6202f01ca54ffbd378e36d1e0"},"schema_version":"1.0","source":{"id":"gr-qc/0202038","kind":"arxiv","version":1}},"canonical_sha256":"d857c7f41aca8618030364557c70546fcecb65ecd783d0c98feae92cdf6a9547","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d857c7f41aca8618030364557c70546fcecb65ecd783d0c98feae92cdf6a9547","first_computed_at":"2026-07-04T16:33:41.779261Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:33:41.779261Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IliWm0UWiGvw+gyPl+meXufjqzpLlnwwbK5wedQnMdwsYDaV5cwSGSS4++WxfSvakNCyCwkw4RLTLN0+0N5HBA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:33:41.779679Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0202038","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd06120c46b9c2a6376c61c4b8a1c04958e1194248eee8302fb475164f37cff7","sha256:4f187067be83870a17af91cac03245c39bbde715ea2f59b840edece4cd5bf132"],"state_sha256":"26b69d70daee46bf07a14dbdde4887d7812dc3a43adba30a8dd507e37de07fc0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XQaLKr25D5SDKKkQcBsv9Azs2yljCnbIDGSgI6JNthKFKWDM+G8BMMi5luvDv6/zzp8Qh4RT4uQkuwhu72WiDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T07:20:14.285158Z","bundle_sha256":"b3c697bba1ba3285ff1f6635d342ee5a1a57656332bcef2dc7de249622af4d97"}}