{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:YFVNMTIFMADLQ7DXWK4QVLSSUM","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":"7d24a0f9b4524d4432b10d2e045ab087f5d62555d91ce1cae2ac4999b58f6866","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-11T10:26:43Z","title_canon_sha256":"1d067b067d38782f206b93c6c80a4bb4290a4162b0832893435b70462121d6d8"},"schema_version":"1.0","source":{"id":"1906.04486","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04486","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04486v1","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04486","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"YFVNMTIFMADL","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"YFVNMTIFMADLQ7DX","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"YFVNMTIF","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:b826ffcfc121cd6cecfc996c658c712df1da9dd026b44c95912fc1a5a0aa7e12","target":"graph","created_at":"2026-05-17T23:40:03Z","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":"Extremely High energy peaked BL Lac (EHBL) objects are a special class of blazars with peculiar observational properties at X-ray and $\\gamma$--ray energies. The observations of these sources indicate hard X-ray and $\\gamma$--ray spectra and absence of rapid flux variations in the multi-wavelength light curves. These observational features challenge the leptonic models for blazars due to unusually hard particle spectrum in the emission region of the blazar jet and provide a strong motivation for exploring alternative scenarios to interpret the broad-band emission from blazars. At present, only","authors_text":"A Tolamatti, F A Ramamonjisoa, K K Singh, P J Meintjes","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-11T10:26:43Z","title":"Extremely High energy peaked BL Lac nature of the TeV blazar Mrk 501"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04486","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":"sha256:080ad58b17133bf6d4225e23294e8edee2eccc32b5c914ce91de484da4014450","target":"record","created_at":"2026-05-17T23:40:03Z","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":"7d24a0f9b4524d4432b10d2e045ab087f5d62555d91ce1cae2ac4999b58f6866","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-11T10:26:43Z","title_canon_sha256":"1d067b067d38782f206b93c6c80a4bb4290a4162b0832893435b70462121d6d8"},"schema_version":"1.0","source":{"id":"1906.04486","kind":"arxiv","version":1}},"canonical_sha256":"c16ad64d056006b87c77b2b90aae52a32af4c74117f0d72a185d3ea3430d9a2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c16ad64d056006b87c77b2b90aae52a32af4c74117f0d72a185d3ea3430d9a2d","first_computed_at":"2026-05-17T23:40:03.316970Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:03.316970Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wiPgYw0eKOnjkiab+/DEMPsOvc1z+TIf046e5NdUqBPLOkGoGdSZRGgKIY0gNonNsYMly0E/CNIlWVqDjag4Dw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:03.317514Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.04486","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:080ad58b17133bf6d4225e23294e8edee2eccc32b5c914ce91de484da4014450","sha256:b826ffcfc121cd6cecfc996c658c712df1da9dd026b44c95912fc1a5a0aa7e12"],"state_sha256":"c9d4496d4d5e76a259547a1300edc46f044a658510c6c4e8e4b47b5c6050e4c2"}