{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:4DAYPPOFLWX2YV5JJV2IU2RG62","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":"8f2e92ed92d3f7319b2b70680d6e3835c96a6d5a6712a33bbbccfc9e130fe289","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T05:10:12Z","title_canon_sha256":"f905d2da59468ab151cec3ae313571fbf9c40fab4335494626d4ae00f46d9b95"},"schema_version":"1.0","source":{"id":"0910.0883","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0883","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0883v1","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0883","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"pith_short_12","alias_value":"4DAYPPOFLWX2","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"4DAYPPOFLWX2YV5J","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"4DAYPPOF","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:d527b0a3f25aa7f20cc5f325e4b74bfcb74cb3f9ea0e5001ca735a6df53ba2da","target":"graph","created_at":"2026-05-18T02:34:20Z","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 describe two-dimensional gasdynamical computations of the X-ray emitting gas in the rotating elliptical galaxy NGC 4649 that indicate an inflow of about one solar mass per year at every radius. Such a large instantaneous inflow cannot have persisted over a Hubble time. The central constant-entropy temperature peak recently observed in the innermost 150 parsecs is explained by compressive heating as gas flows toward the central massive black hole. Since the cooling time of this gas is only a few million years, NGC 4649 provides the most acutely concentrated known example of the cooling flow ","authors_text":"2), (2) Dipartimento di Astronomia, (3) Department of Physics, Astronomy, Astrophysics, David A. Buote (3) ((1) Department of Astronomy, Fabrizio Brighenti (1, Philip J. Humphrey (3), Santa Cruz, Universit\\`a di Bologna, University of California, University of California at Irvine), William G. Mathews (1)","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T05:10:12Z","title":"X-ray Isophotes in a Rapidly Rotating Elliptical Galaxy: Evidence of Inflowing Gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0883","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":"sha256:76c817d32ce5c906a5b1cda6d9f1fd23092c9e5ead44b3d4ec9b28a49521041f","target":"record","created_at":"2026-05-18T02:34:20Z","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":"8f2e92ed92d3f7319b2b70680d6e3835c96a6d5a6712a33bbbccfc9e130fe289","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T05:10:12Z","title_canon_sha256":"f905d2da59468ab151cec3ae313571fbf9c40fab4335494626d4ae00f46d9b95"},"schema_version":"1.0","source":{"id":"0910.0883","kind":"arxiv","version":1}},"canonical_sha256":"e0c187bdc55dafac57a94d748a6a26f68673e93ab7b7a03da45dd5ae67c5a7f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0c187bdc55dafac57a94d748a6a26f68673e93ab7b7a03da45dd5ae67c5a7f5","first_computed_at":"2026-05-18T02:34:20.094561Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:20.094561Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2R3Jy1WjvZXxqF5UrrlFf3ui/7r5vj0mSs1GVERxrvPxGdiwKB+gX1V4hL6xyN/ZZfY0oxu3IbPJkoXrs4NCAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:20.094964Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.0883","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:76c817d32ce5c906a5b1cda6d9f1fd23092c9e5ead44b3d4ec9b28a49521041f","sha256:d527b0a3f25aa7f20cc5f325e4b74bfcb74cb3f9ea0e5001ca735a6df53ba2da"],"state_sha256":"330e9c6663b79d48802517a1bd3680188bf63c15976ed9995fca399bd0bdad6b"}