{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:RBBPNSZDNXIWSY6UPGQQTVPT6L","short_pith_number":"pith:RBBPNSZD","canonical_record":{"source":{"id":"2204.11110","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-23T17:17:53Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c582f79bc41b9ec672762c2ebfe7e0079b7af0d791b2404b2ac2be5064ee86ee","abstract_canon_sha256":"335e73816b8f849756d1e125abf944f61a6241f644ea2a608215a15bb17cd058"},"schema_version":"1.0"},"canonical_sha256":"8842f6cb236dd16963d479a109d5f3f2ec9c44e5407a3ad7d963b996ca802e97","source":{"kind":"arxiv","id":"2204.11110","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.11110","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"arxiv_version","alias_value":"2204.11110v3","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.11110","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_12","alias_value":"RBBPNSZDNXIW","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_16","alias_value":"RBBPNSZDNXIWSY6U","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_8","alias_value":"RBBPNSZD","created_at":"2026-07-05T05:02:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:RBBPNSZDNXIWSY6UPGQQTVPT6L","target":"record","payload":{"canonical_record":{"source":{"id":"2204.11110","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-23T17:17:53Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c582f79bc41b9ec672762c2ebfe7e0079b7af0d791b2404b2ac2be5064ee86ee","abstract_canon_sha256":"335e73816b8f849756d1e125abf944f61a6241f644ea2a608215a15bb17cd058"},"schema_version":"1.0"},"canonical_sha256":"8842f6cb236dd16963d479a109d5f3f2ec9c44e5407a3ad7d963b996ca802e97","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:02:42.021231Z","signature_b64":"T8T73Oeopvn6l6E/s7lqwbr7g5FXIvA+7Xkznxsmp2V49EBx/602nFmeM/gcbSS9SO2znuoP+h41oNewvDXHBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8842f6cb236dd16963d479a109d5f3f2ec9c44e5407a3ad7d963b996ca802e97","last_reissued_at":"2026-07-05T05:02:42.020847Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:02:42.020847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2204.11110","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:02:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CEZ3hv/rEuS8tjRcpy/DhGkg9qDUzgZSKK+NziWM/6rtv8VaZ4QLyS8ZVWQT1YKlm5VYjpp3LRst84PO82/qCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T04:50:54.094374Z"},"content_sha256":"c7ec7480b69b3be83ace101d88e1222f896772134f3a43913ab129b52d0c5106","schema_version":"1.0","event_id":"sha256:c7ec7480b69b3be83ace101d88e1222f896772134f3a43913ab129b52d0c5106"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:RBBPNSZDNXIWSY6UPGQQTVPT6L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on the extragalactic magnetic field strength from blazar spectra based on 145 months of Fermi-LAT observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"E. I. Podlesnyi, T. A. Dzhatdoev, V. I. Galkin","submitted_at":"2022-04-23T17:17:53Z","abstract_excerpt":"Properties of the extragalactic magnetic field (EGMF) outside of clusters and filaments of the large-scale structure are essentially unknown. The EGMF could be probed with $\\gamma$-ray observations of distant (redshift $z > 0.1$) blazars. TeV $\\gamma$ rays from these sources are strongly absorbed on extragalactic background light photons; secondary electrons and positrons produce cascade $\\gamma$ rays with the observable flux dependent on EGMF parameters. We put constraints on the EGMF strength using 145 months of Fermi-LAT observations of the blazars 1ES 1218+304, 1ES 1101-232, and 1ES 0347-1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.11110","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2204.11110/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:02:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ll9e1ngyPaIZmy7BlhXVPj8pxGU9KRbgFgL93Zq/Dob8nKsNZDZMl8thf0JXo6Gs5gWd1no4+eiL9FH2qGG8Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T04:50:54.094888Z"},"content_sha256":"5c240a2cca301d6bbd719a5829324d751265cc7aedfc7ed607d8a7a405257f05","schema_version":"1.0","event_id":"sha256:5c240a2cca301d6bbd719a5829324d751265cc7aedfc7ed607d8a7a405257f05"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/bundle.json","state_url":"https://pith.science/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/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":"2026-08-11T04:50:54Z","links":{"resolver":"https://pith.science/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L","bundle":"https://pith.science/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/bundle.json","state":"https://pith.science/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RBBPNSZDNXIWSY6UPGQQTVPT6L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:RBBPNSZDNXIWSY6UPGQQTVPT6L","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":"335e73816b8f849756d1e125abf944f61a6241f644ea2a608215a15bb17cd058","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-23T17:17:53Z","title_canon_sha256":"c582f79bc41b9ec672762c2ebfe7e0079b7af0d791b2404b2ac2be5064ee86ee"},"schema_version":"1.0","source":{"id":"2204.11110","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.11110","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"arxiv_version","alias_value":"2204.11110v3","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.11110","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_12","alias_value":"RBBPNSZDNXIW","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_16","alias_value":"RBBPNSZDNXIWSY6U","created_at":"2026-07-05T05:02:42Z"},{"alias_kind":"pith_short_8","alias_value":"RBBPNSZD","created_at":"2026-07-05T05:02:42Z"}],"graph_snapshots":[{"event_id":"sha256:5c240a2cca301d6bbd719a5829324d751265cc7aedfc7ed607d8a7a405257f05","target":"graph","created_at":"2026-07-05T05:02:42Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2204.11110/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Properties of the extragalactic magnetic field (EGMF) outside of clusters and filaments of the large-scale structure are essentially unknown. The EGMF could be probed with $\\gamma$-ray observations of distant (redshift $z > 0.1$) blazars. TeV $\\gamma$ rays from these sources are strongly absorbed on extragalactic background light photons; secondary electrons and positrons produce cascade $\\gamma$ rays with the observable flux dependent on EGMF parameters. We put constraints on the EGMF strength using 145 months of Fermi-LAT observations of the blazars 1ES 1218+304, 1ES 1101-232, and 1ES 0347-1","authors_text":"E. I. Podlesnyi, T. A. Dzhatdoev, V. I. Galkin","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-23T17:17:53Z","title":"Constraints on the extragalactic magnetic field strength from blazar spectra based on 145 months of Fermi-LAT observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.11110","kind":"arxiv","version":3},"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:c7ec7480b69b3be83ace101d88e1222f896772134f3a43913ab129b52d0c5106","target":"record","created_at":"2026-07-05T05:02:42Z","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":"335e73816b8f849756d1e125abf944f61a6241f644ea2a608215a15bb17cd058","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-23T17:17:53Z","title_canon_sha256":"c582f79bc41b9ec672762c2ebfe7e0079b7af0d791b2404b2ac2be5064ee86ee"},"schema_version":"1.0","source":{"id":"2204.11110","kind":"arxiv","version":3}},"canonical_sha256":"8842f6cb236dd16963d479a109d5f3f2ec9c44e5407a3ad7d963b996ca802e97","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8842f6cb236dd16963d479a109d5f3f2ec9c44e5407a3ad7d963b996ca802e97","first_computed_at":"2026-07-05T05:02:42.020847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:02:42.020847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T8T73Oeopvn6l6E/s7lqwbr7g5FXIvA+7Xkznxsmp2V49EBx/602nFmeM/gcbSS9SO2znuoP+h41oNewvDXHBA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:02:42.021231Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.11110","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c7ec7480b69b3be83ace101d88e1222f896772134f3a43913ab129b52d0c5106","sha256:5c240a2cca301d6bbd719a5829324d751265cc7aedfc7ed607d8a7a405257f05"],"state_sha256":"46e02cef60b2f5f607e251fedb074818e85cbbf405b6272b275fa4299958f816"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DWrD4Jnkum721GLppqKjs/0v35MHwPs+hyk8FrgWlgI11phje9GfLo22D9M7LuI22z3gxtd7a/vLvbEtBe+2DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T04:50:54.100696Z","bundle_sha256":"f63378b883eb828a25946a719b935a4fa35fbfd2320c1f59051c5dbe015a57c9"}}