{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:STFEPFA4KQTMLTS2QNZICIW3YM","short_pith_number":"pith:STFEPFA4","canonical_record":{"source":{"id":"1906.01708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-04T20:05:22Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"aed89cd691439c8fa4332be177b2966aa7899eef341b184397eb5fe9c07d51aa","abstract_canon_sha256":"00edb18411e5be2e587d5ef2d20adf77a35e381d587c369023930303b827ab97"},"schema_version":"1.0"},"canonical_sha256":"94ca47941c5426c5ce5a83728122dbc301e32a26270b0f0dfde60ece4e11f108","source":{"kind":"arxiv","id":"1906.01708","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.01708","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"arxiv_version","alias_value":"1906.01708v1","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.01708","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"pith_short_12","alias_value":"STFEPFA4KQTM","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"STFEPFA4KQTMLTS2","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"STFEPFA4","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:STFEPFA4KQTMLTS2QNZICIW3YM","target":"record","payload":{"canonical_record":{"source":{"id":"1906.01708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-04T20:05:22Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"aed89cd691439c8fa4332be177b2966aa7899eef341b184397eb5fe9c07d51aa","abstract_canon_sha256":"00edb18411e5be2e587d5ef2d20adf77a35e381d587c369023930303b827ab97"},"schema_version":"1.0"},"canonical_sha256":"94ca47941c5426c5ce5a83728122dbc301e32a26270b0f0dfde60ece4e11f108","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:59.957455Z","signature_b64":"d/xIiep3PROggbgti2cUyECeAhGPljQF+91ltKHvdoxnpKbjlm29JDLOIkI2jM7G27l4z+wEMdWlB1lgtaK2Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94ca47941c5426c5ce5a83728122dbc301e32a26270b0f0dfde60ece4e11f108","last_reissued_at":"2026-05-17T23:42:59.956744Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:59.956744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.01708","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":"2026-05-17T23:42:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LGui9zlAOiEnZNirUQP1QASAC4FDZ0x/zvu/5bHSkpOKYWwk4yg/HaLfhflRTcxoBUHFe+A0OUUdp6lqr05MCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T14:53:19.219362Z"},"content_sha256":"9f01a97d16ba6aaf17962424d52e265cdb8efa0962735932b1c171de6e30f044","schema_version":"1.0","event_id":"sha256:9f01a97d16ba6aaf17962424d52e265cdb8efa0962735932b1c171de6e30f044"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:STFEPFA4KQTMLTS2QNZICIW3YM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two merging galaxy clusters with very hot shock fronts observed shortly before pericentric passage","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"G. S. Souza, P. A. A. Lopes, R. C. Volert, R. E. G. Machado, T. F. Lagan\\'a","submitted_at":"2019-06-04T20:05:22Z","abstract_excerpt":"We present a detailed analysis of two merging clusters, from XMM-\\textit{Newton} X-ray archival data: PLCKESZ G036.7+14.9 ($z=0.15$; hereafter G036) and PLCK G292.5+22.0 ($z=0.30$; hereafter G292). We notice that the intracluster medium is heated as a result of the merger, and we find evidence for a merger shock in the region between both subcluster haloes. X-ray observations confirm that the shocks in these systems are among the hottest known in the literature. From the ICM analysis of temperature discontinuity, the Mach numbers were determined to be $M_{\\rm G036}=1.3$ and $M_{\\rm G292}=1.5$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.01708","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":"2026-05-17T23:42:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"byvqzRfBo2fD96w/rJ9FqTecW1Hrm0teKxefq2fPVS3Tv+5gLzZYd3ucrxpLTVbkNvXzGnoDNM8171RNka3IBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T14:53:19.219709Z"},"content_sha256":"f76be3775114f12ba67ff0bccdaf6319b43200cfa59325900d4331276158fe6c","schema_version":"1.0","event_id":"sha256:f76be3775114f12ba67ff0bccdaf6319b43200cfa59325900d4331276158fe6c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/STFEPFA4KQTMLTS2QNZICIW3YM/bundle.json","state_url":"https://pith.science/pith/STFEPFA4KQTMLTS2QNZICIW3YM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/STFEPFA4KQTMLTS2QNZICIW3YM/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":"2026-06-30T14:53:19Z","links":{"resolver":"https://pith.science/pith/STFEPFA4KQTMLTS2QNZICIW3YM","bundle":"https://pith.science/pith/STFEPFA4KQTMLTS2QNZICIW3YM/bundle.json","state":"https://pith.science/pith/STFEPFA4KQTMLTS2QNZICIW3YM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/STFEPFA4KQTMLTS2QNZICIW3YM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:STFEPFA4KQTMLTS2QNZICIW3YM","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":"00edb18411e5be2e587d5ef2d20adf77a35e381d587c369023930303b827ab97","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-04T20:05:22Z","title_canon_sha256":"aed89cd691439c8fa4332be177b2966aa7899eef341b184397eb5fe9c07d51aa"},"schema_version":"1.0","source":{"id":"1906.01708","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.01708","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"arxiv_version","alias_value":"1906.01708v1","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.01708","created_at":"2026-05-17T23:42:59Z"},{"alias_kind":"pith_short_12","alias_value":"STFEPFA4KQTM","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"STFEPFA4KQTMLTS2","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"STFEPFA4","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:f76be3775114f12ba67ff0bccdaf6319b43200cfa59325900d4331276158fe6c","target":"graph","created_at":"2026-05-17T23:42:59Z","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 present a detailed analysis of two merging clusters, from XMM-\\textit{Newton} X-ray archival data: PLCKESZ G036.7+14.9 ($z=0.15$; hereafter G036) and PLCK G292.5+22.0 ($z=0.30$; hereafter G292). We notice that the intracluster medium is heated as a result of the merger, and we find evidence for a merger shock in the region between both subcluster haloes. X-ray observations confirm that the shocks in these systems are among the hottest known in the literature. From the ICM analysis of temperature discontinuity, the Mach numbers were determined to be $M_{\\rm G036}=1.3$ and $M_{\\rm G292}=1.5$ ","authors_text":"G. S. Souza, P. A. A. Lopes, R. C. Volert, R. E. G. Machado, T. F. Lagan\\'a","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-04T20:05:22Z","title":"Two merging galaxy clusters with very hot shock fronts observed shortly before pericentric passage"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.01708","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":"sha256:9f01a97d16ba6aaf17962424d52e265cdb8efa0962735932b1c171de6e30f044","target":"record","created_at":"2026-05-17T23:42:59Z","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":"00edb18411e5be2e587d5ef2d20adf77a35e381d587c369023930303b827ab97","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-04T20:05:22Z","title_canon_sha256":"aed89cd691439c8fa4332be177b2966aa7899eef341b184397eb5fe9c07d51aa"},"schema_version":"1.0","source":{"id":"1906.01708","kind":"arxiv","version":1}},"canonical_sha256":"94ca47941c5426c5ce5a83728122dbc301e32a26270b0f0dfde60ece4e11f108","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94ca47941c5426c5ce5a83728122dbc301e32a26270b0f0dfde60ece4e11f108","first_computed_at":"2026-05-17T23:42:59.956744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:59.956744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d/xIiep3PROggbgti2cUyECeAhGPljQF+91ltKHvdoxnpKbjlm29JDLOIkI2jM7G27l4z+wEMdWlB1lgtaK2Dg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:59.957455Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.01708","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f01a97d16ba6aaf17962424d52e265cdb8efa0962735932b1c171de6e30f044","sha256:f76be3775114f12ba67ff0bccdaf6319b43200cfa59325900d4331276158fe6c"],"state_sha256":"3790b1508020830b0cd108a058821b7f6ff2d2aa8dac2c5a83e5e6ef20f885f9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IA+Ze4r8Zveg+zlm1RvFAEmtMSaRG0Uh9xef/02v1wW/GzQlMhBbFs6FgKrbY9VggtFOQ0jyf48q7iz+c94sDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-30T14:53:19.221581Z","bundle_sha256":"093c8b13d086aa52b06bf0c18a004122c0d3ae619eb08bbcbaea72243831b28c"}}