{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:SWIGUHJV5MLKBCSJATEFA2G5EW","short_pith_number":"pith:SWIGUHJV","canonical_record":{"source":{"id":"0909.2645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T20:26:13Z","cross_cats_sorted":[],"title_canon_sha256":"3a89f469f68d1acfe1e7174cccbc78c1374394fd6b1158b04aa8583c577b87c5","abstract_canon_sha256":"dc3e6d7876a614d928bc70f79cc85d974426ea33015cce8408f4b8249b46fa3e"},"schema_version":"1.0"},"canonical_sha256":"95906a1d35eb16a08a4904c85068dd25ad0411af5f2e6d78eb903367ce249498","source":{"kind":"arxiv","id":"0909.2645","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2645","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2645v1","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2645","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"pith_short_12","alias_value":"SWIGUHJV5MLK","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SWIGUHJV5MLKBCSJ","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SWIGUHJV","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:SWIGUHJV5MLKBCSJATEFA2G5EW","target":"record","payload":{"canonical_record":{"source":{"id":"0909.2645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T20:26:13Z","cross_cats_sorted":[],"title_canon_sha256":"3a89f469f68d1acfe1e7174cccbc78c1374394fd6b1158b04aa8583c577b87c5","abstract_canon_sha256":"dc3e6d7876a614d928bc70f79cc85d974426ea33015cce8408f4b8249b46fa3e"},"schema_version":"1.0"},"canonical_sha256":"95906a1d35eb16a08a4904c85068dd25ad0411af5f2e6d78eb903367ce249498","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:30.080864Z","signature_b64":"xSTa+WRvZQxwFj2kYHCcde5jE5w2REzW6SW14X7tXApKu9kZ9LZMPD0PTigYzM5X4FYFTv7dksqyobon/qvZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95906a1d35eb16a08a4904c85068dd25ad0411af5f2e6d78eb903367ce249498","last_reissued_at":"2026-05-18T02:34:30.080469Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:30.080469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.2645","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:34:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p8nC4jFXhd2eKjSbVF7K4WqLPZSLHrzf55rJisoNYmvygzV6hMgW7VZwOAuH9D2lPbC+1Oj9jcwYY87WxTJiDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T08:56:24.280275Z"},"content_sha256":"98ff624d11b9109c517e8be99ef33c774cb7c3206db01818f370136895d3f5c0","schema_version":"1.0","event_id":"sha256:98ff624d11b9109c517e8be99ef33c774cb7c3206db01818f370136895d3f5c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:SWIGUHJV5MLKBCSJATEFA2G5EW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A High Fidelity Sample of Cold Front Clusters from the Chandra Archive","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Matt S. Owers (Swinburne/UNSW), Maxim Markevitch (CfA), Paul E.J. Nulsen (CfA), Warrick J. Couch (Swinburne)","submitted_at":"2009-09-14T20:26:13Z","abstract_excerpt":"This paper presents a sample of \"cold front\" clusters selected from the Chandra archive. The clusters are selected based purely on the existence of surface brightness edges in their Chandra images which are modeled as density jumps. A combination of the derived density and temperature jumps across the fronts is used to select nine robust examples of cold front clusters: 1ES0657-558, Abell 1201, Abell 1758N, MS1455.0+2232, Abell 2069, Abell 2142, Abell 2163, RXJ1720.1+2638, and Abell 3667. This sample is the subject of an ongoing study aimed at relating cold fronts to cluster merger activity, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2645","kind":"arxiv","version":1},"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":"2026-05-18T02:34:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cae/rrDcYLuxvqKZjvkth/nOsT8mdnp/h856BRdIZDk9rupYJXnybV/TfECqjem8swGFHbR45f3XB232I7oxCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T08:56:24.280931Z"},"content_sha256":"721277f196233cb74660801448e3db92f06d305ff567dbaf0ecde640dd48ddf5","schema_version":"1.0","event_id":"sha256:721277f196233cb74660801448e3db92f06d305ff567dbaf0ecde640dd48ddf5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/bundle.json","state_url":"https://pith.science/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/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":"2026-05-22T08:56:24Z","links":{"resolver":"https://pith.science/pith/SWIGUHJV5MLKBCSJATEFA2G5EW","bundle":"https://pith.science/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/bundle.json","state":"https://pith.science/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SWIGUHJV5MLKBCSJATEFA2G5EW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:SWIGUHJV5MLKBCSJATEFA2G5EW","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":"dc3e6d7876a614d928bc70f79cc85d974426ea33015cce8408f4b8249b46fa3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T20:26:13Z","title_canon_sha256":"3a89f469f68d1acfe1e7174cccbc78c1374394fd6b1158b04aa8583c577b87c5"},"schema_version":"1.0","source":{"id":"0909.2645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2645","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2645v1","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2645","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"pith_short_12","alias_value":"SWIGUHJV5MLK","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SWIGUHJV5MLKBCSJ","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SWIGUHJV","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:721277f196233cb74660801448e3db92f06d305ff567dbaf0ecde640dd48ddf5","target":"graph","created_at":"2026-05-18T02:34:30Z","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":"This paper presents a sample of \"cold front\" clusters selected from the Chandra archive. The clusters are selected based purely on the existence of surface brightness edges in their Chandra images which are modeled as density jumps. A combination of the derived density and temperature jumps across the fronts is used to select nine robust examples of cold front clusters: 1ES0657-558, Abell 1201, Abell 1758N, MS1455.0+2232, Abell 2069, Abell 2142, Abell 2163, RXJ1720.1+2638, and Abell 3667. This sample is the subject of an ongoing study aimed at relating cold fronts to cluster merger activity, a","authors_text":"Matt S. Owers (Swinburne/UNSW), Maxim Markevitch (CfA), Paul E.J. Nulsen (CfA), Warrick J. Couch (Swinburne)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T20:26:13Z","title":"A High Fidelity Sample of Cold Front Clusters from the Chandra Archive"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2645","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":"sha256:98ff624d11b9109c517e8be99ef33c774cb7c3206db01818f370136895d3f5c0","target":"record","created_at":"2026-05-18T02:34:30Z","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":"dc3e6d7876a614d928bc70f79cc85d974426ea33015cce8408f4b8249b46fa3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T20:26:13Z","title_canon_sha256":"3a89f469f68d1acfe1e7174cccbc78c1374394fd6b1158b04aa8583c577b87c5"},"schema_version":"1.0","source":{"id":"0909.2645","kind":"arxiv","version":1}},"canonical_sha256":"95906a1d35eb16a08a4904c85068dd25ad0411af5f2e6d78eb903367ce249498","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95906a1d35eb16a08a4904c85068dd25ad0411af5f2e6d78eb903367ce249498","first_computed_at":"2026-05-18T02:34:30.080469Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:30.080469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xSTa+WRvZQxwFj2kYHCcde5jE5w2REzW6SW14X7tXApKu9kZ9LZMPD0PTigYzM5X4FYFTv7dksqyobon/qvZCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:30.080864Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98ff624d11b9109c517e8be99ef33c774cb7c3206db01818f370136895d3f5c0","sha256:721277f196233cb74660801448e3db92f06d305ff567dbaf0ecde640dd48ddf5"],"state_sha256":"2650e1bfa969ad5bee616d13cb4f19a92e6600c86f1a00813d72cecb67114362"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aLaRDqvocFxxM4oAzCAQhTU8U1TJyrBGByq3eO93A7gAiXpGGIh6ACnRBxiuVuedThewICccYT9sNsXxgoZZBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T08:56:24.284233Z","bundle_sha256":"661ddcada477e38c6cd75a024a95a17c170aacb34c60ebfd6a3b2593d06e6648"}}