{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:XNR6BMVFFEF3ESYLP4OY5ZAAVQ","short_pith_number":"pith:XNR6BMVF","canonical_record":{"source":{"id":"0907.3072","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-07-17T13:37:30Z","cross_cats_sorted":[],"title_canon_sha256":"9f7364800f7ef742308e3946c3d43cb514ae68547083e7b0b500d84bb210e7eb","abstract_canon_sha256":"846bcd24a7a4909d711fae2569fec01595fcf49ad9b1f5a8ec8be24b9e7638ce"},"schema_version":"1.0"},"canonical_sha256":"bb63e0b2a5290bb24b0b7f1d8ee400ac27e7b8ba15e5ebc5463824f379e29925","source":{"kind":"arxiv","id":"0907.3072","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.3072","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"arxiv_version","alias_value":"0907.3072v1","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3072","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"pith_short_12","alias_value":"XNR6BMVFFEF3","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XNR6BMVFFEF3ESYL","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XNR6BMVF","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:XNR6BMVFFEF3ESYLP4OY5ZAAVQ","target":"record","payload":{"canonical_record":{"source":{"id":"0907.3072","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-07-17T13:37:30Z","cross_cats_sorted":[],"title_canon_sha256":"9f7364800f7ef742308e3946c3d43cb514ae68547083e7b0b500d84bb210e7eb","abstract_canon_sha256":"846bcd24a7a4909d711fae2569fec01595fcf49ad9b1f5a8ec8be24b9e7638ce"},"schema_version":"1.0"},"canonical_sha256":"bb63e0b2a5290bb24b0b7f1d8ee400ac27e7b8ba15e5ebc5463824f379e29925","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:56.140044Z","signature_b64":"V+Ny19HHtsZsf6KiemdmCjAJdce2N+YXskjLUEScJEcbJRouYGAoiJUMVfgcqMpfy/FAvFil97uISwbffX68Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb63e0b2a5290bb24b0b7f1d8ee400ac27e7b8ba15e5ebc5463824f379e29925","last_reissued_at":"2026-05-18T02:12:56.139374Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:56.139374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.3072","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":"2026-05-18T02:12:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ntTNgbHxiYC19g2vPZxh3DygKDqQ0i2Syxkft3i59iMgeIfgF7My5rhOO+zonj+/Xm/AuDwa7gG8GUBWQhgBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T08:34:27.348476Z"},"content_sha256":"c0616151a54525ff36c690da5bd79d040168d005f24d1a1fdbc15f6de48a953b","schema_version":"1.0","event_id":"sha256:c0616151a54525ff36c690da5bd79d040168d005f24d1a1fdbc15f6de48a953b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:XNR6BMVFFEF3ESYLP4OY5ZAAVQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Disorder effects on the superconducting properties of BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. Yamamoto, E. E. Hellstrom, H. W. Weber, J. D. Weiss, J. Jiang, M. Eisterer, M. Zehetmayer","submitted_at":"2009-07-17T13:37:30Z","abstract_excerpt":"Single crystals of superconducting BaFe$_{1.8}$Co$_{0.2}$As$_2$ were exposed to neutron irradiation in a fission reactor. The introduced defects decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical current densities by a factor of up to about 3. These changes are discussed in the context of similar experiments on other superconducting materials."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3072","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":"2026-05-18T02:12:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ldq3x0l+s2TazyUrn2E0VWN3cSoQ2VlN/qVLsQgkUZ5LxuAJ/F1JJaF3RCX4Qd8+Jn1viGjbKaw5183Xg4GDDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T08:34:27.348958Z"},"content_sha256":"807bbdde09c7167347574375b4888337f04f9f877fb0910a9c3c367c28d5af15","schema_version":"1.0","event_id":"sha256:807bbdde09c7167347574375b4888337f04f9f877fb0910a9c3c367c28d5af15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/bundle.json","state_url":"https://pith.science/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/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":"2026-06-07T08:34:27Z","links":{"resolver":"https://pith.science/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ","bundle":"https://pith.science/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/bundle.json","state":"https://pith.science/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XNR6BMVFFEF3ESYLP4OY5ZAAVQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:XNR6BMVFFEF3ESYLP4OY5ZAAVQ","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":"846bcd24a7a4909d711fae2569fec01595fcf49ad9b1f5a8ec8be24b9e7638ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-07-17T13:37:30Z","title_canon_sha256":"9f7364800f7ef742308e3946c3d43cb514ae68547083e7b0b500d84bb210e7eb"},"schema_version":"1.0","source":{"id":"0907.3072","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.3072","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"arxiv_version","alias_value":"0907.3072v1","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3072","created_at":"2026-05-18T02:12:56Z"},{"alias_kind":"pith_short_12","alias_value":"XNR6BMVFFEF3","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XNR6BMVFFEF3ESYL","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XNR6BMVF","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:807bbdde09c7167347574375b4888337f04f9f877fb0910a9c3c367c28d5af15","target":"graph","created_at":"2026-05-18T02:12:56Z","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":"Single crystals of superconducting BaFe$_{1.8}$Co$_{0.2}$As$_2$ were exposed to neutron irradiation in a fission reactor. The introduced defects decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical current densities by a factor of up to about 3. These changes are discussed in the context of similar experiments on other superconducting materials.","authors_text":"A. Yamamoto, E. E. Hellstrom, H. W. Weber, J. D. Weiss, J. Jiang, M. Eisterer, M. Zehetmayer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-07-17T13:37:30Z","title":"Disorder effects on the superconducting properties of BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3072","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:c0616151a54525ff36c690da5bd79d040168d005f24d1a1fdbc15f6de48a953b","target":"record","created_at":"2026-05-18T02:12:56Z","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":"846bcd24a7a4909d711fae2569fec01595fcf49ad9b1f5a8ec8be24b9e7638ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-07-17T13:37:30Z","title_canon_sha256":"9f7364800f7ef742308e3946c3d43cb514ae68547083e7b0b500d84bb210e7eb"},"schema_version":"1.0","source":{"id":"0907.3072","kind":"arxiv","version":1}},"canonical_sha256":"bb63e0b2a5290bb24b0b7f1d8ee400ac27e7b8ba15e5ebc5463824f379e29925","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb63e0b2a5290bb24b0b7f1d8ee400ac27e7b8ba15e5ebc5463824f379e29925","first_computed_at":"2026-05-18T02:12:56.139374Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:56.139374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"V+Ny19HHtsZsf6KiemdmCjAJdce2N+YXskjLUEScJEcbJRouYGAoiJUMVfgcqMpfy/FAvFil97uISwbffX68Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:56.140044Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.3072","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0616151a54525ff36c690da5bd79d040168d005f24d1a1fdbc15f6de48a953b","sha256:807bbdde09c7167347574375b4888337f04f9f877fb0910a9c3c367c28d5af15"],"state_sha256":"d6b29b57f906320b53cae232decc21e7a923ad1345c8afeb31897ee36ecf746a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2XbjK1seBn6r7eUliiVsTwN3gAGbi3VwJ5m9hhBR9ZqMNlixUvh4KptM9Oa5xb/nr+unjVrK2vtj/VXih0KCAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T08:34:27.351512Z","bundle_sha256":"86dab3c2f4162840a95c209c38575578915cb99c398c743d76a0a3d9103f3e90"}}