{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:CXS3YCRLZ7WPPREWO7XGIS5XS6","short_pith_number":"pith:CXS3YCRL","canonical_record":{"source":{"id":"0906.2655","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-15T10:45:33Z","cross_cats_sorted":[],"title_canon_sha256":"8ad5cfb3339c344199dbee6917d330f6101c0191c5bf92c265d9b0f390a05e7d","abstract_canon_sha256":"ae823a512cbdf05a6509a55940f8165af398ee534c2eaad306ee5727b812e3e6"},"schema_version":"1.0"},"canonical_sha256":"15e5bc0a2bcfecf7c49677ee644bb797bc23f86f573d8bc8c0547951778aee27","source":{"kind":"arxiv","id":"0906.2655","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2655","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2655v2","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2655","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_12","alias_value":"CXS3YCRLZ7WP","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_16","alias_value":"CXS3YCRLZ7WPPREW","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_8","alias_value":"CXS3YCRL","created_at":"2026-07-04T17:18:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:CXS3YCRLZ7WPPREWO7XGIS5XS6","target":"record","payload":{"canonical_record":{"source":{"id":"0906.2655","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-15T10:45:33Z","cross_cats_sorted":[],"title_canon_sha256":"8ad5cfb3339c344199dbee6917d330f6101c0191c5bf92c265d9b0f390a05e7d","abstract_canon_sha256":"ae823a512cbdf05a6509a55940f8165af398ee534c2eaad306ee5727b812e3e6"},"schema_version":"1.0"},"canonical_sha256":"15e5bc0a2bcfecf7c49677ee644bb797bc23f86f573d8bc8c0547951778aee27","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:18:51.094803Z","signature_b64":"o62p1ysz9V8kHVI8bsstsF0rc77IriIY4SlKUlIQzNvi8tOqZaxLP+glSEnI93cw65F9i3QhCaH5ycQLupXTBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15e5bc0a2bcfecf7c49677ee644bb797bc23f86f573d8bc8c0547951778aee27","last_reissued_at":"2026-07-04T17:18:51.094422Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:18:51.094422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.2655","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":"2026-07-04T17:18:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cMhnP4WSyGBoYAYlycOQ3KKXfLXH6ornUn1lYW24aVVcx9mjkht4KFzkF522brPMv77IrX0ypBNCyngwM+IyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:02:20.180904Z"},"content_sha256":"8501a86731490e502cb4d82c414ee4922160ef6a9f84d171da77579b895860b4","schema_version":"1.0","event_id":"sha256:8501a86731490e502cb4d82c414ee4922160ef6a9f84d171da77579b895860b4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:CXS3YCRLZ7WPPREWO7XGIS5XS6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Xylophone Configuration for a third Generation Gravitational Wave Detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Andreas Freise, Janyce Franc, Nazario Morgado, Raffaele Flaminio, Riccardo DeSalvo, Simon Chelkowski, Stefan Hild","submitted_at":"2009-06-15T10:45:33Z","abstract_excerpt":"Achieving the demanding sensitivity and bandwidth, envisaged for third generation gravitational wave (GW) observatories, is extremely challenging with a single broadband interferometer. Very high optical powers (Megawatts) are required to reduce the quantum noise contribution at high frequencies, while the interferometer mirrors have to be cooled to cryogenic temperatures in order to reduce thermal noise sources at low frequencies. To resolve this potential conflict of cryogenic test masses with high thermal load, we present a conceptual design for a 2-band xylophone configuration for a third "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2655","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0906.2655/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":"2026-07-04T17:18:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TIwrm27f9Gy5/v92XnJC24gDbtPwrFaRph27mIgvtUTx30LAJXs4qInj3Ul/yifCFXGD/rVgwSA7IeZO9A82BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:02:20.181478Z"},"content_sha256":"532123c9fd40bcbb7e0d17a4201591357dde5dd64265478c2ae06340006b0dfc","schema_version":"1.0","event_id":"sha256:532123c9fd40bcbb7e0d17a4201591357dde5dd64265478c2ae06340006b0dfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/bundle.json","state_url":"https://pith.science/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/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":"2026-08-03T17:02:20Z","links":{"resolver":"https://pith.science/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6","bundle":"https://pith.science/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/bundle.json","state":"https://pith.science/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CXS3YCRLZ7WPPREWO7XGIS5XS6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:CXS3YCRLZ7WPPREWO7XGIS5XS6","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":"ae823a512cbdf05a6509a55940f8165af398ee534c2eaad306ee5727b812e3e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-15T10:45:33Z","title_canon_sha256":"8ad5cfb3339c344199dbee6917d330f6101c0191c5bf92c265d9b0f390a05e7d"},"schema_version":"1.0","source":{"id":"0906.2655","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.2655","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"arxiv_version","alias_value":"0906.2655v2","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.2655","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_12","alias_value":"CXS3YCRLZ7WP","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_16","alias_value":"CXS3YCRLZ7WPPREW","created_at":"2026-07-04T17:18:51Z"},{"alias_kind":"pith_short_8","alias_value":"CXS3YCRL","created_at":"2026-07-04T17:18:51Z"}],"graph_snapshots":[{"event_id":"sha256:532123c9fd40bcbb7e0d17a4201591357dde5dd64265478c2ae06340006b0dfc","target":"graph","created_at":"2026-07-04T17:18:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0906.2655/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Achieving the demanding sensitivity and bandwidth, envisaged for third generation gravitational wave (GW) observatories, is extremely challenging with a single broadband interferometer. Very high optical powers (Megawatts) are required to reduce the quantum noise contribution at high frequencies, while the interferometer mirrors have to be cooled to cryogenic temperatures in order to reduce thermal noise sources at low frequencies. To resolve this potential conflict of cryogenic test masses with high thermal load, we present a conceptual design for a 2-band xylophone configuration for a third ","authors_text":"Andreas Freise, Janyce Franc, Nazario Morgado, Raffaele Flaminio, Riccardo DeSalvo, Simon Chelkowski, Stefan Hild","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-15T10:45:33Z","title":"A Xylophone Configuration for a third Generation Gravitational Wave Detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.2655","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":"sha256:8501a86731490e502cb4d82c414ee4922160ef6a9f84d171da77579b895860b4","target":"record","created_at":"2026-07-04T17:18:51Z","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":"ae823a512cbdf05a6509a55940f8165af398ee534c2eaad306ee5727b812e3e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-15T10:45:33Z","title_canon_sha256":"8ad5cfb3339c344199dbee6917d330f6101c0191c5bf92c265d9b0f390a05e7d"},"schema_version":"1.0","source":{"id":"0906.2655","kind":"arxiv","version":2}},"canonical_sha256":"15e5bc0a2bcfecf7c49677ee644bb797bc23f86f573d8bc8c0547951778aee27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15e5bc0a2bcfecf7c49677ee644bb797bc23f86f573d8bc8c0547951778aee27","first_computed_at":"2026-07-04T17:18:51.094422Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:18:51.094422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o62p1ysz9V8kHVI8bsstsF0rc77IriIY4SlKUlIQzNvi8tOqZaxLP+glSEnI93cw65F9i3QhCaH5ycQLupXTBw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:18:51.094803Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.2655","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8501a86731490e502cb4d82c414ee4922160ef6a9f84d171da77579b895860b4","sha256:532123c9fd40bcbb7e0d17a4201591357dde5dd64265478c2ae06340006b0dfc"],"state_sha256":"93393d0b1df06957d3f3bc3809c17503f0fb3d3ad56273010731bfabafdbffe9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M5pnSNsjoKWJqYg94Ej+CXvrKtAIV2zmbRGHEwYEvJRO6fKIA+EHIcsym7PpMDCy1hNDZ89attRel1vZJUOUBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:02:20.185071Z","bundle_sha256":"4cf87724cdc68ce34cd11354025a68021b79d2e96861e17c973ab1babb18ffb4"}}