{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:SUJF6RK5DA2OWZ3FBTTHXN57H3","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":"89d7e7a0031d7e1752f5ae5eb327ac05fae5c0ac6bb60899c680c8fb90c6aa10","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-24T14:39:19Z","title_canon_sha256":"1f6be63f4af8be29fb4a2569e2be2f8ab26764ead99ff8890eb677acb2e0cc3a"},"schema_version":"1.0","source":{"id":"1603.07595","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.07595","created_at":"2026-05-18T01:18:20Z"},{"alias_kind":"arxiv_version","alias_value":"1603.07595v1","created_at":"2026-05-18T01:18:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.07595","created_at":"2026-05-18T01:18:20Z"},{"alias_kind":"pith_short_12","alias_value":"SUJF6RK5DA2O","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SUJF6RK5DA2OWZ3F","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SUJF6RK5","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:169ee7ddb9df5d3a3cc94e67729bb99923fa77a43eb3b460e0a31fbda69bd106","target":"graph","created_at":"2026-05-18T01:18:20Z","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":"Radio observations over the last two decades have provided evidence that diffuse synchrotron emission in the form of megaparsec-scale radio halos in galaxy clusters is likely tracing regions of the intracluster medium where relativistic particles are accelerated during cluster mergers. In this paper we present results of a survey of 14 galaxy clusters carried out with the 7-element Karoo Array Telescope at 1.86 GHz, aimed to extend the current studies of radio halo occurrence to systems with lower masses (M$_{\\rm 500} > 4\\times10^{14}$ M${_\\odot}$). We found upper limits at the $0.6 - 1.9 \\tim","authors_text":"D. Dallacasa, G. Bernardi, G. Brunetti, M. Johnston-Hollitt, N. Oozeer, O.M. Smirnov, R. Cassano, T. Venturi, V. Cuciti","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-24T14:39:19Z","title":"A KAT-7 view of a low-mass sample of galaxy clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.07595","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":"sha256:354ec948012dc0b2dd22644b24397b903a7372f6fe3233431f7870adc0a27a2f","target":"record","created_at":"2026-05-18T01:18:20Z","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":"89d7e7a0031d7e1752f5ae5eb327ac05fae5c0ac6bb60899c680c8fb90c6aa10","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-24T14:39:19Z","title_canon_sha256":"1f6be63f4af8be29fb4a2569e2be2f8ab26764ead99ff8890eb677acb2e0cc3a"},"schema_version":"1.0","source":{"id":"1603.07595","kind":"arxiv","version":1}},"canonical_sha256":"95125f455d1834eb67650ce67bb7bf3ee122204eaa4c3672504475e5db428874","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95125f455d1834eb67650ce67bb7bf3ee122204eaa4c3672504475e5db428874","first_computed_at":"2026-05-18T01:18:20.456534Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:20.456534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ACVeLtWqvIIMlCsusjAf8+y62dLKVIHjFYeyXada1STJ/G55F1Md0GXbKwf/QrV23XCZARm0bUg9DDt6n0v0DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:20.457136Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.07595","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:354ec948012dc0b2dd22644b24397b903a7372f6fe3233431f7870adc0a27a2f","sha256:169ee7ddb9df5d3a3cc94e67729bb99923fa77a43eb3b460e0a31fbda69bd106"],"state_sha256":"4889800578107cd03f36cca81be61b427cbd082848974cf5d80a8cdcec8ac00f"}