{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:X63UPKJT247GXUNT3BFA2PRTTV","short_pith_number":"pith:X63UPKJT","canonical_record":{"source":{"id":"1503.05107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-17T16:02:21Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"6a9346537ee1f62ab63869fc1d266c275aca100c43f24d727b2be9237183ccfd","abstract_canon_sha256":"1f14be6bfdbfa91e5d3261fb28adf3999d08638673fb90b5795880e382e43c77"},"schema_version":"1.0"},"canonical_sha256":"bfb747a933d73e6bd1b3d84a0d3e339d6ed2c6b2ff6e784a7ef0181f02434a45","source":{"kind":"arxiv","id":"1503.05107","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.05107","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"arxiv_version","alias_value":"1503.05107v1","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.05107","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"pith_short_12","alias_value":"X63UPKJT247G","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"X63UPKJT247GXUNT","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"X63UPKJT","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:X63UPKJT247GXUNT3BFA2PRTTV","target":"record","payload":{"canonical_record":{"source":{"id":"1503.05107","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-17T16:02:21Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"6a9346537ee1f62ab63869fc1d266c275aca100c43f24d727b2be9237183ccfd","abstract_canon_sha256":"1f14be6bfdbfa91e5d3261fb28adf3999d08638673fb90b5795880e382e43c77"},"schema_version":"1.0"},"canonical_sha256":"bfb747a933d73e6bd1b3d84a0d3e339d6ed2c6b2ff6e784a7ef0181f02434a45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:01.416156Z","signature_b64":"6MiiWmko0EpQClF7vLveEx/fu80BC/DktBej6nHt32LKPzKMQNKCWpKTFpuQ8w0GW2XUHhYlE0+8oiwbQgPKCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfb747a933d73e6bd1b3d84a0d3e339d6ed2c6b2ff6e784a7ef0181f02434a45","last_reissued_at":"2026-05-18T01:25:01.415486Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:01.415486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.05107","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":"2026-05-18T01:25:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PejsxTmXEz6IbkF1WszB5PmMuFlAOJDeh5LQlLVUpckHO5c3D1XSTArI6bfd1H2JUza/+AhZe4QBDpumNl3+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:59.507588Z"},"content_sha256":"550b2286ed1edd2e15f6559fb330fd0479a5b0e6d9875f59d1d605dccbe69004","schema_version":"1.0","event_id":"sha256:550b2286ed1edd2e15f6559fb330fd0479a5b0e6d9875f59d1d605dccbe69004"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:X63UPKJT247GXUNT3BFA2PRTTV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low Background Micromegas in CAST","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. C. Jakobsen, A. Tom\\'as, D. Calvet, D. Jourde, E. Ferrer-Ribas, F. E. Christensen, F. J. Iguaz, H. Mirallas, I. Giomataris, I. G. Irastorza, I. Ortega, J. A. Garc\\'ia, J. F. Castel, J. Gal\\'an, J. G. Garza, J. K. Vogel, J. Ruz, M. Davenport, M. J. Pivovaroff, R. M. Hill, S. Aune, T. Dafni, T. Decker, T. Papaevangelou, T. Vafeiadis","submitted_at":"2015-03-17T16:02:21Z","abstract_excerpt":"Solar axions could be converted into x-rays inside the strong magnetic field of an axion helioscope, triggering the detection of this elusive particle. Low background x-ray detectors are an essential component for the sensitivity of these searches. We report on the latest developments of the Micromegas detectors for the CERN Axion Solar Telescope (CAST), including technological pathfinder activities for the future International Axion Observatory (IAXO). The use of low background techniques and the application of discrimination algorithms based on the high granularity of the readout have led to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.05107","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":"2026-05-18T01:25:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCoWSyq3daIyUY0kMvOUvbdFwwNC73tWIp+y8lGi/I5rmGV0+WPPBDIPwPfECQQjrJ5037cAHOHSm5eW2DleDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:59.508259Z"},"content_sha256":"874dd034f67c6a60b07b5237d59360bc9c5f05c23ae69805ad5c05726212f842","schema_version":"1.0","event_id":"sha256:874dd034f67c6a60b07b5237d59360bc9c5f05c23ae69805ad5c05726212f842"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X63UPKJT247GXUNT3BFA2PRTTV/bundle.json","state_url":"https://pith.science/pith/X63UPKJT247GXUNT3BFA2PRTTV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X63UPKJT247GXUNT3BFA2PRTTV/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":"2026-05-25T16:37:59Z","links":{"resolver":"https://pith.science/pith/X63UPKJT247GXUNT3BFA2PRTTV","bundle":"https://pith.science/pith/X63UPKJT247GXUNT3BFA2PRTTV/bundle.json","state":"https://pith.science/pith/X63UPKJT247GXUNT3BFA2PRTTV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X63UPKJT247GXUNT3BFA2PRTTV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:X63UPKJT247GXUNT3BFA2PRTTV","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":"1f14be6bfdbfa91e5d3261fb28adf3999d08638673fb90b5795880e382e43c77","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-17T16:02:21Z","title_canon_sha256":"6a9346537ee1f62ab63869fc1d266c275aca100c43f24d727b2be9237183ccfd"},"schema_version":"1.0","source":{"id":"1503.05107","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.05107","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"arxiv_version","alias_value":"1503.05107v1","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.05107","created_at":"2026-05-18T01:25:01Z"},{"alias_kind":"pith_short_12","alias_value":"X63UPKJT247G","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"X63UPKJT247GXUNT","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"X63UPKJT","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:874dd034f67c6a60b07b5237d59360bc9c5f05c23ae69805ad5c05726212f842","target":"graph","created_at":"2026-05-18T01:25:01Z","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":"Solar axions could be converted into x-rays inside the strong magnetic field of an axion helioscope, triggering the detection of this elusive particle. Low background x-ray detectors are an essential component for the sensitivity of these searches. We report on the latest developments of the Micromegas detectors for the CERN Axion Solar Telescope (CAST), including technological pathfinder activities for the future International Axion Observatory (IAXO). The use of low background techniques and the application of discrimination algorithms based on the high granularity of the readout have led to","authors_text":"A. C. Jakobsen, A. Tom\\'as, D. Calvet, D. Jourde, E. Ferrer-Ribas, F. E. Christensen, F. J. Iguaz, H. Mirallas, I. Giomataris, I. G. Irastorza, I. Ortega, J. A. Garc\\'ia, J. F. Castel, J. Gal\\'an, J. G. Garza, J. K. Vogel, J. Ruz, M. Davenport, M. J. Pivovaroff, R. M. Hill, S. Aune, T. Dafni, T. Decker, T. Papaevangelou, T. Vafeiadis","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-17T16:02:21Z","title":"Low Background Micromegas in CAST"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.05107","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":"sha256:550b2286ed1edd2e15f6559fb330fd0479a5b0e6d9875f59d1d605dccbe69004","target":"record","created_at":"2026-05-18T01:25:01Z","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":"1f14be6bfdbfa91e5d3261fb28adf3999d08638673fb90b5795880e382e43c77","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-17T16:02:21Z","title_canon_sha256":"6a9346537ee1f62ab63869fc1d266c275aca100c43f24d727b2be9237183ccfd"},"schema_version":"1.0","source":{"id":"1503.05107","kind":"arxiv","version":1}},"canonical_sha256":"bfb747a933d73e6bd1b3d84a0d3e339d6ed2c6b2ff6e784a7ef0181f02434a45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfb747a933d73e6bd1b3d84a0d3e339d6ed2c6b2ff6e784a7ef0181f02434a45","first_computed_at":"2026-05-18T01:25:01.415486Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:01.415486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6MiiWmko0EpQClF7vLveEx/fu80BC/DktBej6nHt32LKPzKMQNKCWpKTFpuQ8w0GW2XUHhYlE0+8oiwbQgPKCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:01.416156Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.05107","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:550b2286ed1edd2e15f6559fb330fd0479a5b0e6d9875f59d1d605dccbe69004","sha256:874dd034f67c6a60b07b5237d59360bc9c5f05c23ae69805ad5c05726212f842"],"state_sha256":"42f2f5fdc6a2a2586071f6fd53e3b256b274592597ebaedc9725c3d6a4892927"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hyw+BTZkqzHM6CZz1nQQ96NCID3kR+Efib6O9Fd9ZrOJLiOPYP5wjb5mbJ2OO9QypTT+7Y3nN0LR1usavcZxBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:37:59.511403Z","bundle_sha256":"e06f30726c0f94891a43963116bfd7c26f3eacbdcb8ef9e34b15c499f9d94950"}}