{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:66G2C6AZELCWVK6WLFHZQNSP7Q","short_pith_number":"pith:66G2C6AZ","canonical_record":{"source":{"id":"1604.08223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-27T20:14:41Z","cross_cats_sorted":[],"title_canon_sha256":"02d03641d2cfc57e4f5ff750c35a6acc5a2ee1d836aa6105d4b084f038a986e7","abstract_canon_sha256":"e8ecdfeb50f490e5290517b6c762e2cd943b0535170e9ddb2446ee66b8700443"},"schema_version":"1.0"},"canonical_sha256":"f78da1781922c56aabd6594f98364ffc28367e3bd24308edea387f76d802b93a","source":{"kind":"arxiv","id":"1604.08223","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08223","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08223v1","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08223","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"pith_short_12","alias_value":"66G2C6AZELCW","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"66G2C6AZELCWVK6W","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"66G2C6AZ","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:66G2C6AZELCWVK6WLFHZQNSP7Q","target":"record","payload":{"canonical_record":{"source":{"id":"1604.08223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-27T20:14:41Z","cross_cats_sorted":[],"title_canon_sha256":"02d03641d2cfc57e4f5ff750c35a6acc5a2ee1d836aa6105d4b084f038a986e7","abstract_canon_sha256":"e8ecdfeb50f490e5290517b6c762e2cd943b0535170e9ddb2446ee66b8700443"},"schema_version":"1.0"},"canonical_sha256":"f78da1781922c56aabd6594f98364ffc28367e3bd24308edea387f76d802b93a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:14:38.292280Z","signature_b64":"ocka9Zp6IAsW6OMQN1L+D2ZfXLPe8Cm9paT6LxohTpIvVWlm2vjEFWzZ4Q+lDaK7N68a+ZqthPHP0k+Yj3uSBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f78da1781922c56aabd6594f98364ffc28367e3bd24308edea387f76d802b93a","last_reissued_at":"2026-05-18T01:14:38.291563Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:14:38.291563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.08223","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":"2026-05-18T01:14:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rTo07nkySWcDVJtYMN+tB7+kywlMnqYB32Mji0Rq57KsUj/CXwMNsajLC0XYfddmePcMQN/XcKTXVttPU7jVDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:00:11.071461Z"},"content_sha256":"8f59d8914f70dad5d937bf9073f7d9363cc853ed5b9275c7c94b4848c3e5fbd7","schema_version":"1.0","event_id":"sha256:8f59d8914f70dad5d937bf9073f7d9363cc853ed5b9275c7c94b4848c3e5fbd7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:66G2C6AZELCWVK6WLFHZQNSP7Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The hot gas content of fossil galaxy clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"E. Pointecouteau, G.W. Pratt, M. Arnaud, R.F.J. van der Burg","submitted_at":"2016-04-27T20:14:41Z","abstract_excerpt":"We investigate the properties of the hot gas in four fossil galaxy systems detected at high significance in the Planck Sunyaev-Zeldovich (SZ) survey. XMM-Newton observations reveal overall temperatures of kT ~ 5-6 keV and yield hydrostatic masses M500,HE > 3.5 x 10e14 Msun, confirming their nature as bona fide massive clusters. We measure the thermodynamic properties of the hot gas in X-rays (out to beyond R500 in three cases) and derive their individual pressure profiles out to R ~ 2.5 R500 with the SZ data. We combine the X-ray and SZ data to measure hydrostatic mass profiles and to examine "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08223","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":"2026-05-18T01:14:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1EaJuUyBpMRPki32cWpNBU9NgfC73rVVu98mJrFXuJn35/5iccLoDRNa2xuMqoOG7fY9yJkWER8Nxb6AtJWLAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:00:11.072188Z"},"content_sha256":"b9b18382fa26ca6a07d6a89e0e540ee05f442cd84c936accfdcbad82c4698fda","schema_version":"1.0","event_id":"sha256:b9b18382fa26ca6a07d6a89e0e540ee05f442cd84c936accfdcbad82c4698fda"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/bundle.json","state_url":"https://pith.science/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/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":"2026-05-26T06:00:11Z","links":{"resolver":"https://pith.science/pith/66G2C6AZELCWVK6WLFHZQNSP7Q","bundle":"https://pith.science/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/bundle.json","state":"https://pith.science/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/66G2C6AZELCWVK6WLFHZQNSP7Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:66G2C6AZELCWVK6WLFHZQNSP7Q","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":"e8ecdfeb50f490e5290517b6c762e2cd943b0535170e9ddb2446ee66b8700443","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-27T20:14:41Z","title_canon_sha256":"02d03641d2cfc57e4f5ff750c35a6acc5a2ee1d836aa6105d4b084f038a986e7"},"schema_version":"1.0","source":{"id":"1604.08223","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08223","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08223v1","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08223","created_at":"2026-05-18T01:14:38Z"},{"alias_kind":"pith_short_12","alias_value":"66G2C6AZELCW","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"66G2C6AZELCWVK6W","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"66G2C6AZ","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:b9b18382fa26ca6a07d6a89e0e540ee05f442cd84c936accfdcbad82c4698fda","target":"graph","created_at":"2026-05-18T01:14:38Z","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 investigate the properties of the hot gas in four fossil galaxy systems detected at high significance in the Planck Sunyaev-Zeldovich (SZ) survey. XMM-Newton observations reveal overall temperatures of kT ~ 5-6 keV and yield hydrostatic masses M500,HE > 3.5 x 10e14 Msun, confirming their nature as bona fide massive clusters. We measure the thermodynamic properties of the hot gas in X-rays (out to beyond R500 in three cases) and derive their individual pressure profiles out to R ~ 2.5 R500 with the SZ data. We combine the X-ray and SZ data to measure hydrostatic mass profiles and to examine ","authors_text":"E. Pointecouteau, G.W. Pratt, M. Arnaud, R.F.J. van der Burg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-27T20:14:41Z","title":"The hot gas content of fossil galaxy clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08223","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":"sha256:8f59d8914f70dad5d937bf9073f7d9363cc853ed5b9275c7c94b4848c3e5fbd7","target":"record","created_at":"2026-05-18T01:14:38Z","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":"e8ecdfeb50f490e5290517b6c762e2cd943b0535170e9ddb2446ee66b8700443","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-27T20:14:41Z","title_canon_sha256":"02d03641d2cfc57e4f5ff750c35a6acc5a2ee1d836aa6105d4b084f038a986e7"},"schema_version":"1.0","source":{"id":"1604.08223","kind":"arxiv","version":1}},"canonical_sha256":"f78da1781922c56aabd6594f98364ffc28367e3bd24308edea387f76d802b93a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f78da1781922c56aabd6594f98364ffc28367e3bd24308edea387f76d802b93a","first_computed_at":"2026-05-18T01:14:38.291563Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:14:38.291563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ocka9Zp6IAsW6OMQN1L+D2ZfXLPe8Cm9paT6LxohTpIvVWlm2vjEFWzZ4Q+lDaK7N68a+ZqthPHP0k+Yj3uSBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:14:38.292280Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.08223","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f59d8914f70dad5d937bf9073f7d9363cc853ed5b9275c7c94b4848c3e5fbd7","sha256:b9b18382fa26ca6a07d6a89e0e540ee05f442cd84c936accfdcbad82c4698fda"],"state_sha256":"a8b4f1267c702145f08a7f3c1146ef3b089376286501783b622805e2ccce2ba0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c+ZjoNnja4g834N+QdXoPU26P4Qfc6HnAMGIlmU/6iuPEJ5DErxH+ZF89J848PnVP2rcktRO2C4N8rSL3LHLDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T06:00:11.076067Z","bundle_sha256":"76867bd40dc60c7507ac9f232299769d4e0639995a44042a45ada669d4263941"}}