{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:IDDZ4HVVTNFOJA6DZ2WPFMW3HJ","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":"c3fd51fc7a0e87e98aec2720ac4655aad6afa5e5999a98077cd9a1d0c71e8d73","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T20:00:25Z","title_canon_sha256":"e4bfc0a4fbbc9c4501d16beb410bb8d66328d27f8d0499f6e6d70fac2dc354ed"},"schema_version":"1.0","source":{"id":"1404.2287","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2287","created_at":"2026-05-18T01:43:36Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2287v1","created_at":"2026-05-18T01:43:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2287","created_at":"2026-05-18T01:43:36Z"},{"alias_kind":"pith_short_12","alias_value":"IDDZ4HVVTNFO","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_16","alias_value":"IDDZ4HVVTNFOJA6D","created_at":"2026-05-18T12:28:33Z"},{"alias_kind":"pith_short_8","alias_value":"IDDZ4HVV","created_at":"2026-05-18T12:28:33Z"}],"graph_snapshots":[{"event_id":"sha256:8196c1b1c29f668224430b959c25fda044117efd7375caeef424340b487b4db0","target":"graph","created_at":"2026-05-18T01:43:36Z","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 revisit the average hard X-ray spectrum from the AGN of Centaurus A (Cen A) using ten years worth of observations with INTEGRAL SPI. This source has the highest flux observed from any AGN in the SPI bandpass (23 keV--8 MeV). The 10 year lightcurve of Cen A is presented, and hardness ratios confirm that the spectral shape changes very little despite the luminosity varying by a factor of a few.\n  Primarily, we establish the presence of a reflection component in the average spectrum by demonstrating an excess between 20-60 keV, from extending the spectral shape observed at low energy to the SP","authors_text":"Daniel A. Evans, Elisabeth Jourdain, Jean-Pierre Roques, Mark J. Burke","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T20:00:25Z","title":"The hard X-ray continuum of Cen A observed with INTEGRAL SPI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2287","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":"sha256:1b7bbaa67d4d5bc8728ad70955a395e18f83ff1578af17296e2e8b5d3b6fe8e0","target":"record","created_at":"2026-05-18T01:43:36Z","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":"c3fd51fc7a0e87e98aec2720ac4655aad6afa5e5999a98077cd9a1d0c71e8d73","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-08T20:00:25Z","title_canon_sha256":"e4bfc0a4fbbc9c4501d16beb410bb8d66328d27f8d0499f6e6d70fac2dc354ed"},"schema_version":"1.0","source":{"id":"1404.2287","kind":"arxiv","version":1}},"canonical_sha256":"40c79e1eb59b4ae483c3ceacf2b2db3a442621968ceb5778e209961d78552f11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40c79e1eb59b4ae483c3ceacf2b2db3a442621968ceb5778e209961d78552f11","first_computed_at":"2026-05-18T01:43:36.309544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:36.309544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i+CK8gBAbHl93HAu+tdVzLzhT0GpW/+vqO4zQnbrIDict2pSi2mqt72S9zJVC0mSEsIyTsewVgLbpXAp7gciCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:36.310203Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.2287","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b7bbaa67d4d5bc8728ad70955a395e18f83ff1578af17296e2e8b5d3b6fe8e0","sha256:8196c1b1c29f668224430b959c25fda044117efd7375caeef424340b487b4db0"],"state_sha256":"4abedcf3e36c3686f885105b2875f3f34915a89038d48157ea370baa82c4664d"}