{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:AKDJ527RZSLEMN6354K4IXAZCZ","short_pith_number":"pith:AKDJ527R","canonical_record":{"source":{"id":"1008.3109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-18T15:21:46Z","cross_cats_sorted":[],"title_canon_sha256":"0c98e45eb3640abb15954ad2ec1929268db21a761fd80ebc3e38dd2cae384495","abstract_canon_sha256":"51155182e427c2a05f7620c73f7af5a223e8274443886eda5d028adea796ee33"},"schema_version":"1.0"},"canonical_sha256":"02869eebf1cc964637dbef15c45c1916446f50121f13a11e3631dd2ce0f99558","source":{"kind":"arxiv","id":"1008.3109","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.3109","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"arxiv_version","alias_value":"1008.3109v2","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.3109","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"pith_short_12","alias_value":"AKDJ527RZSLE","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"AKDJ527RZSLEMN63","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"AKDJ527R","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:AKDJ527RZSLEMN6354K4IXAZCZ","target":"record","payload":{"canonical_record":{"source":{"id":"1008.3109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-18T15:21:46Z","cross_cats_sorted":[],"title_canon_sha256":"0c98e45eb3640abb15954ad2ec1929268db21a761fd80ebc3e38dd2cae384495","abstract_canon_sha256":"51155182e427c2a05f7620c73f7af5a223e8274443886eda5d028adea796ee33"},"schema_version":"1.0"},"canonical_sha256":"02869eebf1cc964637dbef15c45c1916446f50121f13a11e3631dd2ce0f99558","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:22.726602Z","signature_b64":"8UbaW7ONcog0TCorcf2Pbj55RzVo5CFL76ImDa0WDSnUp3p3GQRCoMtsE4Tsh1kwW8sGdoE/JPgLgldgqlsiCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02869eebf1cc964637dbef15c45c1916446f50121f13a11e3631dd2ce0f99558","last_reissued_at":"2026-05-18T04:21:22.726060Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:22.726060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.3109","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:21:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oHNwifM9IK5XusKa1eKw3ALrW1e1nOv4FiKfQRhPgWRahZk5fu8TeVOX5m2xOPJt5IUPB0f1K0MQDO1TFjPYCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:53:28.262833Z"},"content_sha256":"c4e596007e1d9a4a6333b7ba92b37f066a8d3fc6c1cc7fd361290cf599239b3f","schema_version":"1.0","event_id":"sha256:c4e596007e1d9a4a6333b7ba92b37f066a8d3fc6c1cc7fd361290cf599239b3f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:AKDJ527RZSLEMN6354K4IXAZCZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cold fronts and multi-temperature structures in the core of Abell 2052","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Simionescu, Jacco Vink, J. de Plaa, J. S. Kaastra, N. Werner, Y. G. Grange","submitted_at":"2010-08-18T15:21:46Z","abstract_excerpt":"The physics of the coolest phases in the hot Intra-Cluster Medium (ICM) of clusters of galaxies is yet to be fully unveiled. X-ray cavities blown by the central Active Galactic Nucleus (AGN) contain enough energy to heat the surrounding gas and stop cooling, but locally blobs or filaments of gas appear to be able to cool to low temperatures of 10^4 K. In X-rays, however, gas with temperatures lower than 0.5 keV is not observed. Using a deep XMM-Newton observation of the cluster of galaxies Abell 2052, we derive 2D maps of the temperature, entropy, and iron abundance in the core region. About 1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.3109","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:21:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZnsFZaFeIGd/HomGPHbsmv+O0SFhpS8nOKOfNshdFzE7C0W3y6awc+pm5+gvHsfPNhV9g1sisyxo8DnySD2fCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:53:28.263588Z"},"content_sha256":"59f41b71c324c32a0211b34d1ab7016f8e2a7e7da0af4691cf5759bfec590d83","schema_version":"1.0","event_id":"sha256:59f41b71c324c32a0211b34d1ab7016f8e2a7e7da0af4691cf5759bfec590d83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AKDJ527RZSLEMN6354K4IXAZCZ/bundle.json","state_url":"https://pith.science/pith/AKDJ527RZSLEMN6354K4IXAZCZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AKDJ527RZSLEMN6354K4IXAZCZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T08:53:28Z","links":{"resolver":"https://pith.science/pith/AKDJ527RZSLEMN6354K4IXAZCZ","bundle":"https://pith.science/pith/AKDJ527RZSLEMN6354K4IXAZCZ/bundle.json","state":"https://pith.science/pith/AKDJ527RZSLEMN6354K4IXAZCZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AKDJ527RZSLEMN6354K4IXAZCZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:AKDJ527RZSLEMN6354K4IXAZCZ","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":"51155182e427c2a05f7620c73f7af5a223e8274443886eda5d028adea796ee33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-18T15:21:46Z","title_canon_sha256":"0c98e45eb3640abb15954ad2ec1929268db21a761fd80ebc3e38dd2cae384495"},"schema_version":"1.0","source":{"id":"1008.3109","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.3109","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"arxiv_version","alias_value":"1008.3109v2","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.3109","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"pith_short_12","alias_value":"AKDJ527RZSLE","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"AKDJ527RZSLEMN63","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"AKDJ527R","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:59f41b71c324c32a0211b34d1ab7016f8e2a7e7da0af4691cf5759bfec590d83","target":"graph","created_at":"2026-05-18T04:21:22Z","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":"The physics of the coolest phases in the hot Intra-Cluster Medium (ICM) of clusters of galaxies is yet to be fully unveiled. X-ray cavities blown by the central Active Galactic Nucleus (AGN) contain enough energy to heat the surrounding gas and stop cooling, but locally blobs or filaments of gas appear to be able to cool to low temperatures of 10^4 K. In X-rays, however, gas with temperatures lower than 0.5 keV is not observed. Using a deep XMM-Newton observation of the cluster of galaxies Abell 2052, we derive 2D maps of the temperature, entropy, and iron abundance in the core region. About 1","authors_text":"A. Simionescu, Jacco Vink, J. de Plaa, J. S. Kaastra, N. Werner, Y. G. Grange","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-18T15:21:46Z","title":"Cold fronts and multi-temperature structures in the core of Abell 2052"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.3109","kind":"arxiv","version":2},"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:c4e596007e1d9a4a6333b7ba92b37f066a8d3fc6c1cc7fd361290cf599239b3f","target":"record","created_at":"2026-05-18T04:21:22Z","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":"51155182e427c2a05f7620c73f7af5a223e8274443886eda5d028adea796ee33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-18T15:21:46Z","title_canon_sha256":"0c98e45eb3640abb15954ad2ec1929268db21a761fd80ebc3e38dd2cae384495"},"schema_version":"1.0","source":{"id":"1008.3109","kind":"arxiv","version":2}},"canonical_sha256":"02869eebf1cc964637dbef15c45c1916446f50121f13a11e3631dd2ce0f99558","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02869eebf1cc964637dbef15c45c1916446f50121f13a11e3631dd2ce0f99558","first_computed_at":"2026-05-18T04:21:22.726060Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:22.726060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8UbaW7ONcog0TCorcf2Pbj55RzVo5CFL76ImDa0WDSnUp3p3GQRCoMtsE4Tsh1kwW8sGdoE/JPgLgldgqlsiCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:22.726602Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.3109","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4e596007e1d9a4a6333b7ba92b37f066a8d3fc6c1cc7fd361290cf599239b3f","sha256:59f41b71c324c32a0211b34d1ab7016f8e2a7e7da0af4691cf5759bfec590d83"],"state_sha256":"cf7e5b04fe4075f93fe9612c071d6947286e17e775faf75690b09b6c534e9bb6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"axJMkQwnjGMRqP4RW96sPEuKN95F3U8tWXxGxXnY3Ocpqb1OKeviXE8RaUH/3Gms0p5S5hgXTu2sRdEAxRF4Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:53:28.267389Z","bundle_sha256":"5f06e964b40db4c61842fb2e37606504940a12b3b2d72b825a3ff1d8120e54c5"}}