{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IBH6VYLP4KSU3SK2MXZZX67DPJ","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":"d4c69a21bead56055db3fe0aa07022f55742e31809d73cecad20afa149bff49f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-10T21:00:05Z","title_canon_sha256":"05f24026d7fe2419689f8891541e1a346813b9e167526f3fbd39417af2d7e27f"},"schema_version":"1.0","source":{"id":"1101.1957","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.1957","created_at":"2026-05-18T02:03:43Z"},{"alias_kind":"arxiv_version","alias_value":"1101.1957v1","created_at":"2026-05-18T02:03:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.1957","created_at":"2026-05-18T02:03:43Z"},{"alias_kind":"pith_short_12","alias_value":"IBH6VYLP4KSU","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IBH6VYLP4KSU3SK2","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IBH6VYLP","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:7767a45616c2551f6922b3cb65452bcdefa4f4ca95fd3c3f4feec8d7654f0cfe","target":"graph","created_at":"2026-05-18T02:03:43Z","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 2-D stellar kinematics of M87 out to R = 238\" taken with the integral field spectrograph VIRUS-P. We run a large set of axisymmetric, orbit-based dynamical models and find clear evidence for a massive dark matter halo. While a logarithmic parameterization for the dark matter halo is preferred, we do not constrain the dark matter scale radius for an NFW profile and therefore cannot rule it out. Our best-fit logarithmic models return an enclosed dark matter fraction of 17.2 +/- 5.0 % within one effective radius (R_e ~ 100\"), rising to 49.4 (+7.2,-8.8) % within 2 R_e. Existing SAURON d","authors_text":"Austin), Jeremy D. Murphy, Joshua J. Adams (University of Texas, Karl Gebhardt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-10T21:00:05Z","title":"Galaxy Kinematics with VIRUS-P: The Dark Matter Halo of M87"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1957","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:e8ef898d2131941e7c376f70fc8071d4195fdb4d4cfabd114a843d5e18b491d4","target":"record","created_at":"2026-05-18T02:03:43Z","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":"d4c69a21bead56055db3fe0aa07022f55742e31809d73cecad20afa149bff49f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-10T21:00:05Z","title_canon_sha256":"05f24026d7fe2419689f8891541e1a346813b9e167526f3fbd39417af2d7e27f"},"schema_version":"1.0","source":{"id":"1101.1957","kind":"arxiv","version":1}},"canonical_sha256":"404feae16fe2a54dc95a65f39bfbe37a5175de795f179cbe2d1169fe48f1fe60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"404feae16fe2a54dc95a65f39bfbe37a5175de795f179cbe2d1169fe48f1fe60","first_computed_at":"2026-05-18T02:03:43.316163Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:43.316163Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"32BoKWjz/oyETgSKR8ccgg8g58Z0/ZLu2+NbyWzVRxBm7KeaEjMjJg21cB5bEgjYKirZkPNM6+r1CEm8izUgBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:43.316672Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.1957","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8ef898d2131941e7c376f70fc8071d4195fdb4d4cfabd114a843d5e18b491d4","sha256:7767a45616c2551f6922b3cb65452bcdefa4f4ca95fd3c3f4feec8d7654f0cfe"],"state_sha256":"c1c561fbb137c1355663c93563849d4f52bd9826a49745b4bfb69bdc423897c1"}