{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:36HYIAPVU6DAQWMCKT5BH47LST","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":"273530df9d9df6579d6ae6a7b81ff0aa3516dbbfc499a8a0f872b8c97873c67e","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-15T19:57:50Z","title_canon_sha256":"2e8b2e926d4c2dac6b8a1fa799a435ea91377eae18124c579c5677ef0ebb3881"},"schema_version":"1.0","source":{"id":"1409.4401","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4401","created_at":"2026-05-18T02:42:46Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4401v1","created_at":"2026-05-18T02:42:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4401","created_at":"2026-05-18T02:42:46Z"},{"alias_kind":"pith_short_12","alias_value":"36HYIAPVU6DA","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"36HYIAPVU6DAQWMC","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"36HYIAPV","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:937bcbb66809993db2282e0658454198b2bfc06a1100f1117b27b5b3b8bd5db3","target":"graph","created_at":"2026-05-18T02:42:46Z","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":"Flat spectrum radio quasars (FSRQs) are a particular class of blazars rich of optical/ultraviolet photons inside the broad line region (BLR), necessarily implying a huge optical depth for $\\gamma$ rays above 20 GeV. As a consequence, photons with energy above such a threshold should not be emitted. However, photons in the energy range 70 - 400 GeV have been observed by MAGIC from the FSRQ PKS 1222+216. Several astrophysical explanations exist in the literature, but they are all ad hoc, namely devised only for that specific purpose. We show that such a surprising discovery can be explained with","authors_text":"Fabrizio Tavecchio, Giacomo Bonnoli, Giorgio Galanti, Marco Roncadelli","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-15T19:57:50Z","title":"Hints for an axion-like particle from PKS 1222+216?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4401","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":"sha256:9c1ab450c1067a5cd34514ece81d761dc7a240bfe7d75d5ee30bcf1072c56b25","target":"record","created_at":"2026-05-18T02:42:46Z","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":"273530df9d9df6579d6ae6a7b81ff0aa3516dbbfc499a8a0f872b8c97873c67e","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-15T19:57:50Z","title_canon_sha256":"2e8b2e926d4c2dac6b8a1fa799a435ea91377eae18124c579c5677ef0ebb3881"},"schema_version":"1.0","source":{"id":"1409.4401","kind":"arxiv","version":1}},"canonical_sha256":"df8f8401f5a78608598254fa13f3eb94f727f66d1044b49d02d81e436057f58b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"df8f8401f5a78608598254fa13f3eb94f727f66d1044b49d02d81e436057f58b","first_computed_at":"2026-05-18T02:42:46.927364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:42:46.927364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dlDI108mLr9hLtPiap7w97paicxG4dM7iErSPBb2pn+pXuuKgxN8W1i3QUmeqbDHXRKdfmuH2KN8dEMW/kueBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:42:46.927775Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.4401","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c1ab450c1067a5cd34514ece81d761dc7a240bfe7d75d5ee30bcf1072c56b25","sha256:937bcbb66809993db2282e0658454198b2bfc06a1100f1117b27b5b3b8bd5db3"],"state_sha256":"a8f4adc5cf8b46c5f43c9012596631a4170644dbb6d32f8611f6ec975e179729"}