{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:M65XKJDB7PQEG7OYAPRUJLSTXL","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":"40332af4bcfbd07709f78d6441c273b6d8605de0168547d62616ec595b8564dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-25T15:25:05Z","title_canon_sha256":"792873a6f0a96cc05a5cbb1e51653fe55bbf700aa5bc00b2a90ea1a3d08943b8"},"schema_version":"1.0","source":{"id":"1307.6788","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.6788","created_at":"2026-05-18T00:34:16Z"},{"alias_kind":"arxiv_version","alias_value":"1307.6788v1","created_at":"2026-05-18T00:34:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6788","created_at":"2026-05-18T00:34:16Z"},{"alias_kind":"pith_short_12","alias_value":"M65XKJDB7PQE","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"M65XKJDB7PQEG7OY","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"M65XKJDB","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:5bc825ce09fa418ffb35b8b855fb6e996c6a48392303ce5c21fc95f14b28dbbf","target":"graph","created_at":"2026-05-18T00:34:16Z","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":"Recent weak and strong lensing data of the galaxy cluster A1689 are modelled by dark fermions that are quantum degenerate within some core. The gas density, deduced from X-ray observations up to 1 Mpc and obeying a cored power law, is taken as input, while the galaxy mass density is modelled. An additional dark matter tail may arise from cold or warm dark matter, axions or non-degenerate neutrinos. The fit yields that the fermions are degenerate within a 430 kpc radius. The fermion mass is a few eV and the best case involves 3 active plus 3 sterile neutrinos of equal mass, for which we deduce ","authors_text":"Andrea Morandi, Theo M. Nieuwenhuizen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-25T15:25:05Z","title":"Are observations of the galaxy cluster Abell 1689 consistent with a neutrino dark matter scenario?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6788","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:da7c82d729555324d091451967a93165016fbdd62c1d9499033ef91555a17cd7","target":"record","created_at":"2026-05-18T00:34:16Z","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":"40332af4bcfbd07709f78d6441c273b6d8605de0168547d62616ec595b8564dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-25T15:25:05Z","title_canon_sha256":"792873a6f0a96cc05a5cbb1e51653fe55bbf700aa5bc00b2a90ea1a3d08943b8"},"schema_version":"1.0","source":{"id":"1307.6788","kind":"arxiv","version":1}},"canonical_sha256":"67bb752461fbe0437dd803e344ae53bae8c655f3f9e74188eeeb5923090936fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67bb752461fbe0437dd803e344ae53bae8c655f3f9e74188eeeb5923090936fb","first_computed_at":"2026-05-18T00:34:16.378864Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:16.378864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RXnBNJuZjGsc9fs5fSZ1yVx43tSkjESZWM+Kiv7LQbbBitl4tQFBG21Vj5bHq3tsL5fbIrvPIO9BtFodbCRWDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:16.379442Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.6788","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da7c82d729555324d091451967a93165016fbdd62c1d9499033ef91555a17cd7","sha256:5bc825ce09fa418ffb35b8b855fb6e996c6a48392303ce5c21fc95f14b28dbbf"],"state_sha256":"62db59eec0688ee2ac2ce9bdbfb5805e3f3274d2e96159d96da2f42ee4f61feb"}