{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:MDCKLHZE37LTIRXDWSIC63PZLZ","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":"a98aa1a8ba61827eb3b6ab7a7712014b08e3e1e59ae316aeebef9a0a56ecf209","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-07-04T11:35:26Z","title_canon_sha256":"3254b88537a550a6382218dd15cd06fd54e1da5c7d17c503034a99244dc2ef76"},"schema_version":"1.0","source":{"id":"astro-ph/0307090","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0307090","created_at":"2026-07-04T16:52:06Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0307090v1","created_at":"2026-07-04T16:52:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0307090","created_at":"2026-07-04T16:52:06Z"},{"alias_kind":"pith_short_12","alias_value":"MDCKLHZE37LT","created_at":"2026-07-04T16:52:06Z"},{"alias_kind":"pith_short_16","alias_value":"MDCKLHZE37LTIRXD","created_at":"2026-07-04T16:52:06Z"},{"alias_kind":"pith_short_8","alias_value":"MDCKLHZE","created_at":"2026-07-04T16:52:06Z"}],"graph_snapshots":[{"event_id":"sha256:7b58a4f7d245aeff9b5c9cb3880c65850f28bc1c1a12639b62289a3325dcfd19","target":"graph","created_at":"2026-07-04T16:52:06Z","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/astro-ph/0307090/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The cluster of galaxies A754 undergoes a merger of several large structural units. X-ray observations show a nonequilibrium state of the central part of the cluster, in which a cloud of cold plasma 500 kpc in size was identified amid the hotter cluster gas. The X-ray image of A754 exhibits a brightness discontinuity, which can be interpreted as a shock wave in front of a moving cloud of dense gas. The shock parameters are determined from the jump in intergalactic gas density using the ROSAT image. The estimated Mach number is M=1.71^{+0.45}_{-0.24} at a 68% confidence level.","authors_text":"A. Vikhlinin, M. Markevitch, M. Pavlinsky, R. Krivonos","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-07-04T11:35:26Z","title":"A Possible Shock Wave in the Intergalactic Medium of the Cluster of Galaxies A754"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0307090","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":"sha256:7ff37714bd0a9792a689c9e5be92a3151e51b292055e47046dfbcc32c0d91a99","target":"record","created_at":"2026-07-04T16:52:06Z","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":"a98aa1a8ba61827eb3b6ab7a7712014b08e3e1e59ae316aeebef9a0a56ecf209","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-07-04T11:35:26Z","title_canon_sha256":"3254b88537a550a6382218dd15cd06fd54e1da5c7d17c503034a99244dc2ef76"},"schema_version":"1.0","source":{"id":"astro-ph/0307090","kind":"arxiv","version":1}},"canonical_sha256":"60c4a59f24dfd73446e3b4902f6df95e7ce416cb60930993c5eb616e8a6ebc56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60c4a59f24dfd73446e3b4902f6df95e7ce416cb60930993c5eb616e8a6ebc56","first_computed_at":"2026-07-04T16:52:06.589394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:52:06.589394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9rDvadjBBFlsy5suNyXfyaymuipjIuxnp6iXSgeicaRwsVzoCPZsMfZSZO9ofO2eNW2o4Y6oJtpl5NZwGpGaBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:52:06.589758Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0307090","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ff37714bd0a9792a689c9e5be92a3151e51b292055e47046dfbcc32c0d91a99","sha256:7b58a4f7d245aeff9b5c9cb3880c65850f28bc1c1a12639b62289a3325dcfd19"],"state_sha256":"5f2ff79a160f70aa4ae0962a4a5d0c331efbf04ab5645d45c2000a0f23914a79"}