{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:2JYKTPBAUPMRYLBSIT3K3DWTYW","short_pith_number":"pith:2JYKTPBA","canonical_record":{"source":{"id":"2502.02161","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-02-04T09:37:20Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"e58c981d2c946e28ffe0b6d4737c94cb4b1730786a601886fa75ef3a395c3862","abstract_canon_sha256":"38babca237a0fe66b0f237bf9861dd8562cc86085cb5ac0f12e57b46ebf68d36"},"schema_version":"1.0"},"canonical_sha256":"d270a9bc20a3d91c2c3244f6ad8ed3c5832afd7461a2b052e4c1964b97be984b","source":{"kind":"arxiv","id":"2502.02161","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.02161","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"arxiv_version","alias_value":"2502.02161v3","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.02161","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_12","alias_value":"2JYKTPBAUPMR","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_16","alias_value":"2JYKTPBAUPMRYLBS","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_8","alias_value":"2JYKTPBA","created_at":"2026-07-05T12:07:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:2JYKTPBAUPMRYLBSIT3K3DWTYW","target":"record","payload":{"canonical_record":{"source":{"id":"2502.02161","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-02-04T09:37:20Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"e58c981d2c946e28ffe0b6d4737c94cb4b1730786a601886fa75ef3a395c3862","abstract_canon_sha256":"38babca237a0fe66b0f237bf9861dd8562cc86085cb5ac0f12e57b46ebf68d36"},"schema_version":"1.0"},"canonical_sha256":"d270a9bc20a3d91c2c3244f6ad8ed3c5832afd7461a2b052e4c1964b97be984b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:07:58.099007Z","signature_b64":"fCgOxj4lIAjKULN2RHcBTQz97EEy9kR6tKrp98I2O1dU58Sx+NTVim2dzzzeHjmPjUPAD4UEw31oz2ONE1j5Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d270a9bc20a3d91c2c3244f6ad8ed3c5832afd7461a2b052e4c1964b97be984b","last_reissued_at":"2026-07-05T12:07:58.098505Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:07:58.098505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.02161","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T12:07:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"viw2firpUemhxugQpO3SqCsBKywjBzQuFiElTFxhte+nPefDRll+1BZkwIIiQQrTmBz24kpajx9lgZa03F3RDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T11:04:01.877043Z"},"content_sha256":"13c3189d3525db4b21707c885c69292c9ce3a9ff4d264fa56811f3b4c5bd726c","schema_version":"1.0","event_id":"sha256:13c3189d3525db4b21707c885c69292c9ce3a9ff4d264fa56811f3b4c5bd726c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:2JYKTPBAUPMRYLBSIT3K3DWTYW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A plug-and-play solution for characterizing two-way optical frequency transfer over free-space","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"physics.optics","authors_text":"Alexander Kuhl, Fabian Steinlechner, Jingxian Ji, Jochen Kronj\\\"ager, Markus Leipe, Markus Rothe, Sebastian Koke, Shambo Mukherjee","submitted_at":"2025-02-04T09:37:20Z","abstract_excerpt":"Optical clock networks connected by phase-coherent links offer significant potential for advancing fundamental research and diverse scientific applications. Free-space optical frequency transfer extends fiber-based connectivity to remote areas and holds the potential for global coverage via satellite links. Here we present a compact and robust portable, rack-integrated two-way free-space link characterization system. Equipped with plug-and-play capabilities, the system enables straightforward interfacing with various optical systems and facilitates quick deployment for field experiments. In th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.02161","kind":"arxiv","version":3},"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/2502.02161/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":"2026-07-05T12:07:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8K5CnTHqL+hh0IZaHoEOBr2eP+9ViMziWv/SakcH2Q+yR1uffESHEPo/SmGBxG7WASqXaLAnoKur4Q7VIlitDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T11:04:01.877730Z"},"content_sha256":"9d43b425454b15ed490ba27716151478637fd2ca3a3aabe3eded31ad584d6adc","schema_version":"1.0","event_id":"sha256:9d43b425454b15ed490ba27716151478637fd2ca3a3aabe3eded31ad584d6adc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/bundle.json","state_url":"https://pith.science/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/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":"2026-08-14T11:04:01Z","links":{"resolver":"https://pith.science/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW","bundle":"https://pith.science/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/bundle.json","state":"https://pith.science/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2JYKTPBAUPMRYLBSIT3K3DWTYW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:2JYKTPBAUPMRYLBSIT3K3DWTYW","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":"38babca237a0fe66b0f237bf9861dd8562cc86085cb5ac0f12e57b46ebf68d36","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-02-04T09:37:20Z","title_canon_sha256":"e58c981d2c946e28ffe0b6d4737c94cb4b1730786a601886fa75ef3a395c3862"},"schema_version":"1.0","source":{"id":"2502.02161","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.02161","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"arxiv_version","alias_value":"2502.02161v3","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.02161","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_12","alias_value":"2JYKTPBAUPMR","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_16","alias_value":"2JYKTPBAUPMRYLBS","created_at":"2026-07-05T12:07:58Z"},{"alias_kind":"pith_short_8","alias_value":"2JYKTPBA","created_at":"2026-07-05T12:07:58Z"}],"graph_snapshots":[{"event_id":"sha256:9d43b425454b15ed490ba27716151478637fd2ca3a3aabe3eded31ad584d6adc","target":"graph","created_at":"2026-07-05T12:07:58Z","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/2502.02161/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optical clock networks connected by phase-coherent links offer significant potential for advancing fundamental research and diverse scientific applications. Free-space optical frequency transfer extends fiber-based connectivity to remote areas and holds the potential for global coverage via satellite links. Here we present a compact and robust portable, rack-integrated two-way free-space link characterization system. Equipped with plug-and-play capabilities, the system enables straightforward interfacing with various optical systems and facilitates quick deployment for field experiments. In th","authors_text":"Alexander Kuhl, Fabian Steinlechner, Jingxian Ji, Jochen Kronj\\\"ager, Markus Leipe, Markus Rothe, Sebastian Koke, Shambo Mukherjee","cross_cats":["physics.ins-det"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-02-04T09:37:20Z","title":"A plug-and-play solution for characterizing two-way optical frequency transfer over free-space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.02161","kind":"arxiv","version":3},"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":"sha256:13c3189d3525db4b21707c885c69292c9ce3a9ff4d264fa56811f3b4c5bd726c","target":"record","created_at":"2026-07-05T12:07:58Z","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":"38babca237a0fe66b0f237bf9861dd8562cc86085cb5ac0f12e57b46ebf68d36","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-02-04T09:37:20Z","title_canon_sha256":"e58c981d2c946e28ffe0b6d4737c94cb4b1730786a601886fa75ef3a395c3862"},"schema_version":"1.0","source":{"id":"2502.02161","kind":"arxiv","version":3}},"canonical_sha256":"d270a9bc20a3d91c2c3244f6ad8ed3c5832afd7461a2b052e4c1964b97be984b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d270a9bc20a3d91c2c3244f6ad8ed3c5832afd7461a2b052e4c1964b97be984b","first_computed_at":"2026-07-05T12:07:58.098505Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:07:58.098505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fCgOxj4lIAjKULN2RHcBTQz97EEy9kR6tKrp98I2O1dU58Sx+NTVim2dzzzeHjmPjUPAD4UEw31oz2ONE1j5Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T12:07:58.099007Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.02161","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13c3189d3525db4b21707c885c69292c9ce3a9ff4d264fa56811f3b4c5bd726c","sha256:9d43b425454b15ed490ba27716151478637fd2ca3a3aabe3eded31ad584d6adc"],"state_sha256":"f4775e6b9e9b479e97b0d2b5c398e12f758d9bc709d4cfe16a7518cc9390c41a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YSoeLu/ZWTPRuqQ1lWXCihS3CAKKexj7iFnHRcGsBegzItg0wfXISENcJHl+OgVdad3UcPkq61pB5JkdoheaCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T11:04:01.887490Z","bundle_sha256":"e900bc74b91bd1c9c52b236753a42449e4ca3f53c2e44765fd48b318e932336a"}}