{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:OL3EZ4AHU4SC5B557YPOWJJHAP","short_pith_number":"pith:OL3EZ4AH","canonical_record":{"source":{"id":"2106.07168","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-14T05:23:16Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"e4e89699e982c7b9c6b3eb9b2447643ef413cf951c4f1738c5897d6661381031","abstract_canon_sha256":"44583ff65892908c937e1859aff4d22040a42f8d50255fd3d6825f7deeb7c6e0"},"schema_version":"1.0"},"canonical_sha256":"72f64cf007a7242e87bdfe1eeb252703de9e9a5c21762b2102a61476dfe66f7b","source":{"kind":"arxiv","id":"2106.07168","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.07168","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"arxiv_version","alias_value":"2106.07168v2","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.07168","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_12","alias_value":"OL3EZ4AHU4SC","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_16","alias_value":"OL3EZ4AHU4SC5B55","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_8","alias_value":"OL3EZ4AH","created_at":"2026-07-05T03:36:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:OL3EZ4AHU4SC5B557YPOWJJHAP","target":"record","payload":{"canonical_record":{"source":{"id":"2106.07168","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-14T05:23:16Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"e4e89699e982c7b9c6b3eb9b2447643ef413cf951c4f1738c5897d6661381031","abstract_canon_sha256":"44583ff65892908c937e1859aff4d22040a42f8d50255fd3d6825f7deeb7c6e0"},"schema_version":"1.0"},"canonical_sha256":"72f64cf007a7242e87bdfe1eeb252703de9e9a5c21762b2102a61476dfe66f7b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:36:06.610586Z","signature_b64":"ImOmVVMdvQn2kKKvELzMr64yzkrb1w0T42t5gDu1hCDJ+Mtsl8i9F42qfq1C49d8Fe606C8uQcuWMB3fWXvfBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72f64cf007a7242e87bdfe1eeb252703de9e9a5c21762b2102a61476dfe66f7b","last_reissued_at":"2026-07-05T03:36:06.610076Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:36:06.610076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.07168","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":"2026-07-05T03:36:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HcubRFOOYjf2vtjdzCtA1ctTtTrRvWjSk9SzZ8FrwVrGj2GPEN8I5Cr41DWJcXwUFD9Z/LnYDkIz00qdNmIGCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:49:45.952644Z"},"content_sha256":"1d29602e7d01b09d8ed121a1672f3e46a4de55819f3b57953c7cc2e33ec5627f","schema_version":"1.0","event_id":"sha256:1d29602e7d01b09d8ed121a1672f3e46a4de55819f3b57953c7cc2e33ec5627f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:OL3EZ4AHU4SC5B557YPOWJJHAP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systematic Perturbations of the Thermodynamic Properties in Cool Cores of HIFLUGCS Galaxy Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"FanLam Ng, Keiichi Umetsu, Sandor M. Molnar, Shutaro Ueda, Tetsu Kitayama, Yuto Ichinohe","submitted_at":"2021-06-14T05:23:16Z","abstract_excerpt":"We present an ensemble X-ray analysis of systematic perturbations in the central hot gas properties for a sample of 28 nearby strong cool-core systems selected from the HIghest X-ray FLUx Galaxy Cluster Sample (HIFLUGCS). We analyze their cool-core features observed with the Chandra X-ray Observatory. All individual systems in our sample exhibit at least a pair of positive and negative excess perturbations in the X-ray residual image after subtracting the global brightness profile. We extract and analyze X-ray spectra of the intracluster medium (ICM) in the detected perturbed regions. To inves"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.07168","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2106.07168/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:36:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WafOzEhg++HG0nUNetFh7W850huZQwtTnT3/xBdOzQhsMg717lXoXpyqu/B/PZslTyneEhg/TpP2Qw1wC1ARCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:49:45.953147Z"},"content_sha256":"249b6f5dca5c8bb878d88a9903fe50353a629973ff0a31ab15c3bbc3cf7eeea9","schema_version":"1.0","event_id":"sha256:249b6f5dca5c8bb878d88a9903fe50353a629973ff0a31ab15c3bbc3cf7eeea9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/bundle.json","state_url":"https://pith.science/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/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":"2026-08-05T09:49:45Z","links":{"resolver":"https://pith.science/pith/OL3EZ4AHU4SC5B557YPOWJJHAP","bundle":"https://pith.science/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/bundle.json","state":"https://pith.science/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OL3EZ4AHU4SC5B557YPOWJJHAP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:OL3EZ4AHU4SC5B557YPOWJJHAP","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":"44583ff65892908c937e1859aff4d22040a42f8d50255fd3d6825f7deeb7c6e0","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-14T05:23:16Z","title_canon_sha256":"e4e89699e982c7b9c6b3eb9b2447643ef413cf951c4f1738c5897d6661381031"},"schema_version":"1.0","source":{"id":"2106.07168","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.07168","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"arxiv_version","alias_value":"2106.07168v2","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.07168","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_12","alias_value":"OL3EZ4AHU4SC","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_16","alias_value":"OL3EZ4AHU4SC5B55","created_at":"2026-07-05T03:36:06Z"},{"alias_kind":"pith_short_8","alias_value":"OL3EZ4AH","created_at":"2026-07-05T03:36:06Z"}],"graph_snapshots":[{"event_id":"sha256:249b6f5dca5c8bb878d88a9903fe50353a629973ff0a31ab15c3bbc3cf7eeea9","target":"graph","created_at":"2026-07-05T03:36:06Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2106.07168/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an ensemble X-ray analysis of systematic perturbations in the central hot gas properties for a sample of 28 nearby strong cool-core systems selected from the HIghest X-ray FLUx Galaxy Cluster Sample (HIFLUGCS). We analyze their cool-core features observed with the Chandra X-ray Observatory. All individual systems in our sample exhibit at least a pair of positive and negative excess perturbations in the X-ray residual image after subtracting the global brightness profile. We extract and analyze X-ray spectra of the intracluster medium (ICM) in the detected perturbed regions. To inves","authors_text":"FanLam Ng, Keiichi Umetsu, Sandor M. Molnar, Shutaro Ueda, Tetsu Kitayama, Yuto Ichinohe","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-14T05:23:16Z","title":"Systematic Perturbations of the Thermodynamic Properties in Cool Cores of HIFLUGCS Galaxy Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.07168","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":"sha256:1d29602e7d01b09d8ed121a1672f3e46a4de55819f3b57953c7cc2e33ec5627f","target":"record","created_at":"2026-07-05T03:36:06Z","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":"44583ff65892908c937e1859aff4d22040a42f8d50255fd3d6825f7deeb7c6e0","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-14T05:23:16Z","title_canon_sha256":"e4e89699e982c7b9c6b3eb9b2447643ef413cf951c4f1738c5897d6661381031"},"schema_version":"1.0","source":{"id":"2106.07168","kind":"arxiv","version":2}},"canonical_sha256":"72f64cf007a7242e87bdfe1eeb252703de9e9a5c21762b2102a61476dfe66f7b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72f64cf007a7242e87bdfe1eeb252703de9e9a5c21762b2102a61476dfe66f7b","first_computed_at":"2026-07-05T03:36:06.610076Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:36:06.610076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ImOmVVMdvQn2kKKvELzMr64yzkrb1w0T42t5gDu1hCDJ+Mtsl8i9F42qfq1C49d8Fe606C8uQcuWMB3fWXvfBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:36:06.610586Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.07168","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d29602e7d01b09d8ed121a1672f3e46a4de55819f3b57953c7cc2e33ec5627f","sha256:249b6f5dca5c8bb878d88a9903fe50353a629973ff0a31ab15c3bbc3cf7eeea9"],"state_sha256":"0cf33b46c57eb97dc4d5004c7b0bcb8fc4dd78be177bf08cf6658e9813947340"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ME21AnV7QCeNnax8aR3CDL11dAcqLX3ECOCYClDSAPcQaQH1OmHGOPF2H+wbJkBgSVnvBxdVtalVJzK2NeQ8Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T09:49:45.958233Z","bundle_sha256":"cdacdb66839d95c72f7ed347ce21cd09f2f68c01261a852f53968d92d57596ec"}}