{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:2IPXRUYQFR7CLULJNEAFIPJ4T3","short_pith_number":"pith:2IPXRUYQ","canonical_record":{"source":{"id":"1705.05732","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-05-12T14:02:15Z","cross_cats_sorted":[],"title_canon_sha256":"ff6471295688deca479aa64cd5f68d865d48b260562d081ee3ed8c50a5d402d6","abstract_canon_sha256":"917205a158f7f4ccef3749444465df29dd9593d6a9230f2ce4ba1425ea2b59fb"},"schema_version":"1.0"},"canonical_sha256":"d21f78d3102c7e25d1696900543d3c9ec1c792af121563b095a13287a7537e57","source":{"kind":"arxiv","id":"1705.05732","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.05732","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1705.05732v2","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.05732","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"2IPXRUYQFR7C","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2IPXRUYQFR7CLULJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2IPXRUYQ","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:2IPXRUYQFR7CLULJNEAFIPJ4T3","target":"record","payload":{"canonical_record":{"source":{"id":"1705.05732","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-05-12T14:02:15Z","cross_cats_sorted":[],"title_canon_sha256":"ff6471295688deca479aa64cd5f68d865d48b260562d081ee3ed8c50a5d402d6","abstract_canon_sha256":"917205a158f7f4ccef3749444465df29dd9593d6a9230f2ce4ba1425ea2b59fb"},"schema_version":"1.0"},"canonical_sha256":"d21f78d3102c7e25d1696900543d3c9ec1c792af121563b095a13287a7537e57","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:23.364920Z","signature_b64":"mCx54oEa62A1U6j9Yvysut24byhowLICf0tmay0syQl3gzveedA/ywMpE9MCVLHukMZ/11wl6oLDNnjqWHCbBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d21f78d3102c7e25d1696900543d3c9ec1c792af121563b095a13287a7537e57","last_reissued_at":"2026-05-18T00:42:23.364466Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:23.364466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.05732","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":"2026-05-18T00:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L0lJfYQn+Tua90fyqbJoKyGrCAJmV8n6gbwc5fKKLlPz9l+CSrdEp5vUGRzEsIQiS7IzO56yT2jYSfE9T+xsDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T14:10:47.162670Z"},"content_sha256":"0945832eda7fcb2babb11933699802581d44cae65b0a4456ee2742fd8d8375bd","schema_version":"1.0","event_id":"sha256:0945832eda7fcb2babb11933699802581d44cae65b0a4456ee2742fd8d8375bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:2IPXRUYQFR7CLULJNEAFIPJ4T3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tomographic X-ray data of carved cheese","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Alexander Meaney, Jonatan Lehtonen, Markus Juvonen, Maximilian M\\\"arz, Samuli Siltanen, Tatiana A. Bubba, Zenith Purisha","submitted_at":"2017-05-12T14:02:15Z","abstract_excerpt":"This is the documentation of the tomographic X-ray data of a carved cheese slice. Data are available at www.fips.fi/dataset.php, and can be freely used for scientific purposes with appropriate references to them, and to this document in http://arxiv.org/. The data set consists of (1) the X-ray sinogram of a single 2D slice of the cheese slice with three different resolutions and (2) the corresponding measurement matrices modeling the linear operation of the X-ray transform. Each of these sinograms was obtained from a measured 360-projection fan-beam sinogram by down-sampling and taking logarit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.05732","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":""},"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":"2026-05-18T00:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z5OAEzOeB7Yny6/cp6NRcTr0jCukl/6UfDuwKHHTg6Jpt3nqk4GpQTBsDFo82d9vHy640XwnvDj4ecC2ueFbAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T14:10:47.163459Z"},"content_sha256":"a1a324269d871b95d68df31e3e3ced4ab3df29bdd3178ce99a29cc136a0ca58a","schema_version":"1.0","event_id":"sha256:a1a324269d871b95d68df31e3e3ced4ab3df29bdd3178ce99a29cc136a0ca58a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/bundle.json","state_url":"https://pith.science/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/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":"2026-06-07T14:10:47Z","links":{"resolver":"https://pith.science/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3","bundle":"https://pith.science/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/bundle.json","state":"https://pith.science/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2IPXRUYQFR7CLULJNEAFIPJ4T3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2IPXRUYQFR7CLULJNEAFIPJ4T3","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":"917205a158f7f4ccef3749444465df29dd9593d6a9230f2ce4ba1425ea2b59fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-05-12T14:02:15Z","title_canon_sha256":"ff6471295688deca479aa64cd5f68d865d48b260562d081ee3ed8c50a5d402d6"},"schema_version":"1.0","source":{"id":"1705.05732","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.05732","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1705.05732v2","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.05732","created_at":"2026-05-18T00:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"2IPXRUYQFR7C","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2IPXRUYQFR7CLULJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2IPXRUYQ","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:a1a324269d871b95d68df31e3e3ced4ab3df29bdd3178ce99a29cc136a0ca58a","target":"graph","created_at":"2026-05-18T00:42:23Z","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":"This is the documentation of the tomographic X-ray data of a carved cheese slice. Data are available at www.fips.fi/dataset.php, and can be freely used for scientific purposes with appropriate references to them, and to this document in http://arxiv.org/. The data set consists of (1) the X-ray sinogram of a single 2D slice of the cheese slice with three different resolutions and (2) the corresponding measurement matrices modeling the linear operation of the X-ray transform. Each of these sinograms was obtained from a measured 360-projection fan-beam sinogram by down-sampling and taking logarit","authors_text":"Alexander Meaney, Jonatan Lehtonen, Markus Juvonen, Maximilian M\\\"arz, Samuli Siltanen, Tatiana A. Bubba, Zenith Purisha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-05-12T14:02:15Z","title":"Tomographic X-ray data of carved cheese"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.05732","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":"sha256:0945832eda7fcb2babb11933699802581d44cae65b0a4456ee2742fd8d8375bd","target":"record","created_at":"2026-05-18T00:42:23Z","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":"917205a158f7f4ccef3749444465df29dd9593d6a9230f2ce4ba1425ea2b59fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-05-12T14:02:15Z","title_canon_sha256":"ff6471295688deca479aa64cd5f68d865d48b260562d081ee3ed8c50a5d402d6"},"schema_version":"1.0","source":{"id":"1705.05732","kind":"arxiv","version":2}},"canonical_sha256":"d21f78d3102c7e25d1696900543d3c9ec1c792af121563b095a13287a7537e57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d21f78d3102c7e25d1696900543d3c9ec1c792af121563b095a13287a7537e57","first_computed_at":"2026-05-18T00:42:23.364466Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:23.364466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mCx54oEa62A1U6j9Yvysut24byhowLICf0tmay0syQl3gzveedA/ywMpE9MCVLHukMZ/11wl6oLDNnjqWHCbBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:23.364920Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.05732","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0945832eda7fcb2babb11933699802581d44cae65b0a4456ee2742fd8d8375bd","sha256:a1a324269d871b95d68df31e3e3ced4ab3df29bdd3178ce99a29cc136a0ca58a"],"state_sha256":"6c1be2eeed40017072d66a994041dbc24a6733eedfa35e4a3e9d23829683b50c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CKsiD1zN5DNFEHb4/D/mcRcmz2OeFMOcO7hLfthYKewy6+URNhToweVo8tD4bMePztEaDpowJvXBgisfHeZXAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T14:10:47.167900Z","bundle_sha256":"bae87983685d9480c4bbb227151367529980205cbf4d38aa2627bdbd3071ff58"}}