{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:Q53ROT44GKRAXPVVGN6IW3GQBW","short_pith_number":"pith:Q53ROT44","canonical_record":{"source":{"id":"1812.01075","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-12-03T20:43:02Z","cross_cats_sorted":[],"title_canon_sha256":"454492691c1730634926c3fd6f611f4f799d493b7bff591620aefb6cc835050d","abstract_canon_sha256":"7acca9b1671ec67c45b3c25d6721cf63299ce682e81b448432107a9c28e32d1d"},"schema_version":"1.0"},"canonical_sha256":"8777174f9c32a20bbeb5337c8b6cd00db266bc343c0da28b0b20e08800b12e62","source":{"kind":"arxiv","id":"1812.01075","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01075","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01075v2","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01075","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"pith_short_12","alias_value":"Q53ROT44GKRA","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q53ROT44GKRAXPVV","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q53ROT44","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:Q53ROT44GKRAXPVVGN6IW3GQBW","target":"record","payload":{"canonical_record":{"source":{"id":"1812.01075","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-12-03T20:43:02Z","cross_cats_sorted":[],"title_canon_sha256":"454492691c1730634926c3fd6f611f4f799d493b7bff591620aefb6cc835050d","abstract_canon_sha256":"7acca9b1671ec67c45b3c25d6721cf63299ce682e81b448432107a9c28e32d1d"},"schema_version":"1.0"},"canonical_sha256":"8777174f9c32a20bbeb5337c8b6cd00db266bc343c0da28b0b20e08800b12e62","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:27.296606Z","signature_b64":"j2HK4lMZU2Fh9VKpIJqWDbcI4ecuo+YL6zRAnu6REmJ3406iXOXj5bJmOmed9OxYMwzYn+SAZ9kpXab0EB2eAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8777174f9c32a20bbeb5337c8b6cd00db266bc343c0da28b0b20e08800b12e62","last_reissued_at":"2026-05-17T23:47:27.295902Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:27.295902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.01075","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":"2026-05-17T23:47:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gIQdJMvxriCnh5VSQ4emfJG2q7c2oQ3h/dXwdhPd48Y1QClPazrffu4Qih5A9qnop+E6xjyMhwyty3lOX6r0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:48:51.501268Z"},"content_sha256":"e8982da9168a0c77a7c0ad1862cc2ef6610dbe63375c73eafe23963fc0fd06a9","schema_version":"1.0","event_id":"sha256:e8982da9168a0c77a7c0ad1862cc2ef6610dbe63375c73eafe23963fc0fd06a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:Q53ROT44GKRAXPVVGN6IW3GQBW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Johann-type laboratory-scale X-ray absorption spectrometer with versatile detection modes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Antti-Jussi Kallio, Ari-Pekka Honkanen, Merja Blomberg, Sami Ollikkala, Simo Huotari, Taru Ahopelto","submitted_at":"2018-12-03T20:43:02Z","abstract_excerpt":"We present a low-cost laboratory X-ray absorption spectrometer that uses a conventional X-ray tube source and bent Johann-type crystal monochromators. The instrument is designed for XAS studies in the 4-20 keV range which covers most K edges of 3d transition metals and L edges of 5d transition metals and actinides. The energy resolution is typically in the range of 1-5 eV at 10 keV depending on the crystal analyser and the Bragg angle. Measurements can be performed in transmission, fluorescence, and imaging modes. Due to its simple and modular design, the spectrometer can be modified to accomm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01075","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":"2026-05-17T23:47:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gfhGXutmzvlvnKwg5FnmyZrTwl/XHtzqidxADHoEfGJjFlgK42uhFLk1hqMbXwaruuBFrJp4Dg8okJDaqBQnDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:48:51.501993Z"},"content_sha256":"8595d7431ad4145241397a80d6757b8adb49ba91cdd24b79c6a0b2ccf1a1e429","schema_version":"1.0","event_id":"sha256:8595d7431ad4145241397a80d6757b8adb49ba91cdd24b79c6a0b2ccf1a1e429"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/bundle.json","state_url":"https://pith.science/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/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":"2026-06-06T23:48:51Z","links":{"resolver":"https://pith.science/pith/Q53ROT44GKRAXPVVGN6IW3GQBW","bundle":"https://pith.science/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/bundle.json","state":"https://pith.science/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q53ROT44GKRAXPVVGN6IW3GQBW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Q53ROT44GKRAXPVVGN6IW3GQBW","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":"7acca9b1671ec67c45b3c25d6721cf63299ce682e81b448432107a9c28e32d1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-12-03T20:43:02Z","title_canon_sha256":"454492691c1730634926c3fd6f611f4f799d493b7bff591620aefb6cc835050d"},"schema_version":"1.0","source":{"id":"1812.01075","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01075","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01075v2","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01075","created_at":"2026-05-17T23:47:27Z"},{"alias_kind":"pith_short_12","alias_value":"Q53ROT44GKRA","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q53ROT44GKRAXPVV","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q53ROT44","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:8595d7431ad4145241397a80d6757b8adb49ba91cdd24b79c6a0b2ccf1a1e429","target":"graph","created_at":"2026-05-17T23:47:27Z","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":"We present a low-cost laboratory X-ray absorption spectrometer that uses a conventional X-ray tube source and bent Johann-type crystal monochromators. The instrument is designed for XAS studies in the 4-20 keV range which covers most K edges of 3d transition metals and L edges of 5d transition metals and actinides. The energy resolution is typically in the range of 1-5 eV at 10 keV depending on the crystal analyser and the Bragg angle. Measurements can be performed in transmission, fluorescence, and imaging modes. Due to its simple and modular design, the spectrometer can be modified to accomm","authors_text":"Antti-Jussi Kallio, Ari-Pekka Honkanen, Merja Blomberg, Sami Ollikkala, Simo Huotari, Taru Ahopelto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-12-03T20:43:02Z","title":"Johann-type laboratory-scale X-ray absorption spectrometer with versatile detection modes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01075","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:e8982da9168a0c77a7c0ad1862cc2ef6610dbe63375c73eafe23963fc0fd06a9","target":"record","created_at":"2026-05-17T23:47:27Z","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":"7acca9b1671ec67c45b3c25d6721cf63299ce682e81b448432107a9c28e32d1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-12-03T20:43:02Z","title_canon_sha256":"454492691c1730634926c3fd6f611f4f799d493b7bff591620aefb6cc835050d"},"schema_version":"1.0","source":{"id":"1812.01075","kind":"arxiv","version":2}},"canonical_sha256":"8777174f9c32a20bbeb5337c8b6cd00db266bc343c0da28b0b20e08800b12e62","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8777174f9c32a20bbeb5337c8b6cd00db266bc343c0da28b0b20e08800b12e62","first_computed_at":"2026-05-17T23:47:27.295902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:27.295902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j2HK4lMZU2Fh9VKpIJqWDbcI4ecuo+YL6zRAnu6REmJ3406iXOXj5bJmOmed9OxYMwzYn+SAZ9kpXab0EB2eAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:27.296606Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.01075","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8982da9168a0c77a7c0ad1862cc2ef6610dbe63375c73eafe23963fc0fd06a9","sha256:8595d7431ad4145241397a80d6757b8adb49ba91cdd24b79c6a0b2ccf1a1e429"],"state_sha256":"1f1c17e8077623c405a4fe9fbe01a0aa958e330aa9ae882d7345fee72dcb302c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RS73viWOFgDY3izihkzp0NfMS30YYXXO/3fal7KjQKBcOK4rSGQ+SurYYOi3SQEcXfaRoqT41lAX1i+lmNTjDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T23:48:51.505521Z","bundle_sha256":"20353bd6f209ca7fef98b0dd58deac6d41b8231829d882fd34cd806e3244672a"}}