{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:WDJFQFDC6HJ4UESAZ3P4WHDDXU","short_pith_number":"pith:WDJFQFDC","canonical_record":{"source":{"id":"1012.5313","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-12-23T22:28:15Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"809b7245f9a56f890d8baf1984479b1f97a2ee0559aa93c9a7259de61c54654c","abstract_canon_sha256":"4acc6fc3fc5bf384d3bad3b924f26ccdb97b24d32843e7997f5ef2a4487befa2"},"schema_version":"1.0"},"canonical_sha256":"b0d2581462f1d3ca1240cedfcb1c63bd16741a580562d752fcbb54e27fe43510","source":{"kind":"arxiv","id":"1012.5313","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.5313","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"arxiv_version","alias_value":"1012.5313v2","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5313","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"pith_short_12","alias_value":"WDJFQFDC6HJ4","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"WDJFQFDC6HJ4UESA","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"WDJFQFDC","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:WDJFQFDC6HJ4UESAZ3P4WHDDXU","target":"record","payload":{"canonical_record":{"source":{"id":"1012.5313","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-12-23T22:28:15Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"809b7245f9a56f890d8baf1984479b1f97a2ee0559aa93c9a7259de61c54654c","abstract_canon_sha256":"4acc6fc3fc5bf384d3bad3b924f26ccdb97b24d32843e7997f5ef2a4487befa2"},"schema_version":"1.0"},"canonical_sha256":"b0d2581462f1d3ca1240cedfcb1c63bd16741a580562d752fcbb54e27fe43510","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:58:51.583172Z","signature_b64":"4Ja4JSc9RqCdbFpEGO1pDbYdTfkU/HcMtjY+oJ+TIvGAK5RBnhi8osTEpBAlb028hDhbbsGj2fhtOcm9ojmYBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0d2581462f1d3ca1240cedfcb1c63bd16741a580562d752fcbb54e27fe43510","last_reissued_at":"2026-05-18T03:58:51.582665Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:58:51.582665Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.5313","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":"2026-05-18T03:58:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8/xIZJzJuNDdDUbklFGh9B5PL1cN45apWoZ0bV39JBwU/rVnsZhSjdpAqz91ymYDw0JTNkTlAc0/oxU/VLYvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:42:59.718195Z"},"content_sha256":"556a9b18d4e3ad1db3f03c02c8728370d20d9fddd85de4e5d66b9ea8a50119db","schema_version":"1.0","event_id":"sha256:556a9b18d4e3ad1db3f03c02c8728370d20d9fddd85de4e5d66b9ea8a50119db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:WDJFQFDC6HJ4UESAZ3P4WHDDXU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Determination of intergalactic magnetic fields from gamma ray data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"Alexander Kusenko, Shin'ichiro Ando, Warren Essey","submitted_at":"2010-12-23T22:28:15Z","abstract_excerpt":"We report a measurement of intergalactic magnetic fields using combined data from Atmospheric Cherenkov Telescopes and Fermi Gamma-Ray Space Telescope, based on the spectral data alone. If blazars are assumed to produce both gamma rays and cosmic rays, the observed spectra are not sensitive to the intrinsic spectrum of the source, because, for a distant blazar, secondary photons produced in line-of-sight cosmic-ray interactions dominate the signal. In this case, we find 0.01 fG < B < 30 fG. If one excludes the cosmic-ray component, the 0.01 fG lower limit remains, but the upper limit depends o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5313","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":"2026-05-18T03:58:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qvP5mFnEAPmPRCRplMJhuKp+DQ5EiCVQrm/EoZyseyt/YLHFA6LvewXupIPgXihffdJnVxTYQYgeKnMovE5YDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:42:59.718568Z"},"content_sha256":"3ebd9309efbea353368ccabe47526c9afbdaa9ec0c7a65d7cc4d5cafdd0dafa7","schema_version":"1.0","event_id":"sha256:3ebd9309efbea353368ccabe47526c9afbdaa9ec0c7a65d7cc4d5cafdd0dafa7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/bundle.json","state_url":"https://pith.science/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/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":"2026-06-01T13:42:59Z","links":{"resolver":"https://pith.science/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU","bundle":"https://pith.science/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/bundle.json","state":"https://pith.science/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WDJFQFDC6HJ4UESAZ3P4WHDDXU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:WDJFQFDC6HJ4UESAZ3P4WHDDXU","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":"4acc6fc3fc5bf384d3bad3b924f26ccdb97b24d32843e7997f5ef2a4487befa2","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-12-23T22:28:15Z","title_canon_sha256":"809b7245f9a56f890d8baf1984479b1f97a2ee0559aa93c9a7259de61c54654c"},"schema_version":"1.0","source":{"id":"1012.5313","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.5313","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"arxiv_version","alias_value":"1012.5313v2","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5313","created_at":"2026-05-18T03:58:51Z"},{"alias_kind":"pith_short_12","alias_value":"WDJFQFDC6HJ4","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"WDJFQFDC6HJ4UESA","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"WDJFQFDC","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:3ebd9309efbea353368ccabe47526c9afbdaa9ec0c7a65d7cc4d5cafdd0dafa7","target":"graph","created_at":"2026-05-18T03:58:51Z","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 report a measurement of intergalactic magnetic fields using combined data from Atmospheric Cherenkov Telescopes and Fermi Gamma-Ray Space Telescope, based on the spectral data alone. If blazars are assumed to produce both gamma rays and cosmic rays, the observed spectra are not sensitive to the intrinsic spectrum of the source, because, for a distant blazar, secondary photons produced in line-of-sight cosmic-ray interactions dominate the signal. In this case, we find 0.01 fG < B < 30 fG. If one excludes the cosmic-ray component, the 0.01 fG lower limit remains, but the upper limit depends o","authors_text":"Alexander Kusenko, Shin'ichiro Ando, Warren Essey","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-12-23T22:28:15Z","title":"Determination of intergalactic magnetic fields from gamma ray data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5313","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":"sha256:556a9b18d4e3ad1db3f03c02c8728370d20d9fddd85de4e5d66b9ea8a50119db","target":"record","created_at":"2026-05-18T03:58:51Z","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":"4acc6fc3fc5bf384d3bad3b924f26ccdb97b24d32843e7997f5ef2a4487befa2","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-12-23T22:28:15Z","title_canon_sha256":"809b7245f9a56f890d8baf1984479b1f97a2ee0559aa93c9a7259de61c54654c"},"schema_version":"1.0","source":{"id":"1012.5313","kind":"arxiv","version":2}},"canonical_sha256":"b0d2581462f1d3ca1240cedfcb1c63bd16741a580562d752fcbb54e27fe43510","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0d2581462f1d3ca1240cedfcb1c63bd16741a580562d752fcbb54e27fe43510","first_computed_at":"2026-05-18T03:58:51.582665Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:58:51.582665Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4Ja4JSc9RqCdbFpEGO1pDbYdTfkU/HcMtjY+oJ+TIvGAK5RBnhi8osTEpBAlb028hDhbbsGj2fhtOcm9ojmYBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:58:51.583172Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.5313","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:556a9b18d4e3ad1db3f03c02c8728370d20d9fddd85de4e5d66b9ea8a50119db","sha256:3ebd9309efbea353368ccabe47526c9afbdaa9ec0c7a65d7cc4d5cafdd0dafa7"],"state_sha256":"ef094e054bea7ebc008da9448f07edeb9c23f9ed15f3b373e289eac7ad466e48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7JnyLWZlFWPY8UdzWjENtx4VcOtjsHbACvJIMCUbvz4umG05x6/zdZBmXCMaQ59BjByTUq16zrUCHOQbx0wfAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T13:42:59.721135Z","bundle_sha256":"9e1b35d32c4204d1ec7517a7eaa1d4e44aa2745aa291b80c4114fe3dc7c9131a"}}