{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:LJMWMDAD7IC33ETTS2NRLGLB4N","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":"87595b266ba5e9146d5356931ec9885a5e3e534069efaf0179839f61b1c5a5d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-11T11:11:54Z","title_canon_sha256":"63f217526d8e5e639ba6dd66c40b5768495d241f7d43f88ef453a6791010d5b9"},"schema_version":"1.0","source":{"id":"1302.2447","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.2447","created_at":"2026-05-18T03:34:01Z"},{"alias_kind":"arxiv_version","alias_value":"1302.2447v1","created_at":"2026-05-18T03:34:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.2447","created_at":"2026-05-18T03:34:01Z"},{"alias_kind":"pith_short_12","alias_value":"LJMWMDAD7IC3","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LJMWMDAD7IC33ETT","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LJMWMDAD","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:d70f8d6e8d9d26f80c3be422faec592eb6da212427141fde0462540b67be9cf0","target":"graph","created_at":"2026-05-18T03:34:01Z","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":"Within the blazar population, hard X-ray selected objects are of particular interest as they tend to lie at each end of the blazar sequence. In particular, flat spectrum radio quasars located at high redshifts display the most powerful jets, the largest black hole masses and the most luminous accretion disks: their spectral energy distribution has a Compton peak in the sub-MeV region which favours their detection by instruments like INTEGRAL/IBIS and Swift/BAT. These sources are even more extreme than blazars selected in other wavebands, like, for example, the gamma-ray range explored by Fermi","authors_text":"A. Bazzano (INAF/IAPS Rome), A. J. Bird (University of Southampton), A. Malizia (INAF/IASF Bologna), Loredana Bassani (INAF/IASF Bologna), M. Molina (INAF/IASF Bologna), P. Ubertini (INAF/IAPS Rome), R. Landi (INAF/IASF Bologna)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-11T11:11:54Z","title":"Chasing extreme blazars with INTEGRAL"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.2447","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":"sha256:6db2feaa7fd9ac401753d096a071da2e4ba221215d4337a131529a28dfcdc47a","target":"record","created_at":"2026-05-18T03:34:01Z","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":"87595b266ba5e9146d5356931ec9885a5e3e534069efaf0179839f61b1c5a5d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-11T11:11:54Z","title_canon_sha256":"63f217526d8e5e639ba6dd66c40b5768495d241f7d43f88ef453a6791010d5b9"},"schema_version":"1.0","source":{"id":"1302.2447","kind":"arxiv","version":1}},"canonical_sha256":"5a59660c03fa05bd9273969b159961e34ec42c72d2f126b2c86e659414c3b5da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a59660c03fa05bd9273969b159961e34ec42c72d2f126b2c86e659414c3b5da","first_computed_at":"2026-05-18T03:34:01.088440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:34:01.088440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eNib6UCr1a8cGIBJ2CUijj9LQN9pouxiEmfolThnZlJRRGPO8i3S1YltouB+lZSsbtBb83nSyfp4owLgTa/oAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:34:01.088950Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.2447","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6db2feaa7fd9ac401753d096a071da2e4ba221215d4337a131529a28dfcdc47a","sha256:d70f8d6e8d9d26f80c3be422faec592eb6da212427141fde0462540b67be9cf0"],"state_sha256":"748b58ab0a03ad733765526857366e02b914633f06a0baf3151bd1168b0922d2"}