{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:IUA6NZFJJHAF4R4CR6R4MFRIJA","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":"499063df1ed8128691b332f9da52606c1478e69b03107d6ea8937881e69cc2aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-05-23T17:10:30Z","title_canon_sha256":"9f7c79d0eaad8648a918611a59584fd4157127cdde0bd81de7a6c6f447d0a161"},"schema_version":"1.0","source":{"id":"1305.5484","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.5484","created_at":"2026-05-18T01:49:47Z"},{"alias_kind":"arxiv_version","alias_value":"1305.5484v1","created_at":"2026-05-18T01:49:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.5484","created_at":"2026-05-18T01:49:47Z"},{"alias_kind":"pith_short_12","alias_value":"IUA6NZFJJHAF","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"IUA6NZFJJHAF4R4C","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"IUA6NZFJ","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:58914152ec55c5698d80fce477435a9317f2708a66dff3592fde069ce97a985b","target":"graph","created_at":"2026-05-18T01:49:47Z","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 examine the radiative cooling of coronal loops and demonstrate that the recently identified catastrophic cooling (Reale and Landi, 2012) is due to the inability of a loop to sustain radiative / enthalpy cooling below a critical temperature, which can be > 1 MK in flares, 0.5 - 1 MK in active regions and 0.1 MK in long tenuous loops. Catastrophic cooling is characterised by a rapid fall in coronal temperature while the coronal density changes by a small amount. Analytic expressions for the critical temperature are derived and show good agreement with numerical results. This effect limits ver","authors_text":"Peter J. Cargill, Stephen J. Bradshaw","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-05-23T17:10:30Z","title":"The Cooling of Coronal Plasmas. iv: Catastrophic Cooling of Loops"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.5484","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":"sha256:4d4f8ac0e4e23983975f84c2fc808a2a15703895957644ee1caf9b8b03a06c46","target":"record","created_at":"2026-05-18T01:49:47Z","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":"499063df1ed8128691b332f9da52606c1478e69b03107d6ea8937881e69cc2aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-05-23T17:10:30Z","title_canon_sha256":"9f7c79d0eaad8648a918611a59584fd4157127cdde0bd81de7a6c6f447d0a161"},"schema_version":"1.0","source":{"id":"1305.5484","kind":"arxiv","version":1}},"canonical_sha256":"4501e6e4a949c05e47828fa3c61628483ccc808aa1aa18048911fdb426e9ef6a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4501e6e4a949c05e47828fa3c61628483ccc808aa1aa18048911fdb426e9ef6a","first_computed_at":"2026-05-18T01:49:47.218082Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:47.218082Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GXEYB+uhtyVfSRtYlWrSq4tWNLPVypdbmD6mDJ7dF0qh9I84dPiYLKkq8FAuGSgX7q9n0dGetk/N/qSaE5+YBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:47.218552Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.5484","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d4f8ac0e4e23983975f84c2fc808a2a15703895957644ee1caf9b8b03a06c46","sha256:58914152ec55c5698d80fce477435a9317f2708a66dff3592fde069ce97a985b"],"state_sha256":"946963acb0d7050773ae4712b501a4c5f906b6e6b7ce7d81bb8778be9f2e7aae"}