{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:M4WEYOUCDUVRNEPP6QSJ7RGRSJ","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":"7c9239fb6ee45ce21e8c8999a75bfbf85492e635b2ae91d86c663c7600bc1ab7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T16:35:33Z","title_canon_sha256":"726bcabab67c006a90e257e60e46b779236ce36b002f5fc64da170b60a64d9a9"},"schema_version":"1.0","source":{"id":"1708.08867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08867","created_at":"2026-05-18T00:26:45Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08867v1","created_at":"2026-05-18T00:26:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08867","created_at":"2026-05-18T00:26:45Z"},{"alias_kind":"pith_short_12","alias_value":"M4WEYOUCDUVR","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"M4WEYOUCDUVRNEPP","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"M4WEYOUC","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:898ce3bc3c0819c750a7e675a3952d5b1a6bcf80aa6ffdf0b66ce3947637b5cc","target":"graph","created_at":"2026-05-18T00:26:45Z","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":"In this paper, we place constraints on four alternative cosmological models under the assumption of the spatial flatness of the Universe: CPL, EDE, GCG and MPC. A new compilation of 120 compact radio quasars observed by very-long-baseline interferometry, which represents a type of new cosmological standard rulers, are used to test these cosmological models. Our results show that the fits on CPL obtained from the quasar sample are well consistent with those obtained from BAO. For other cosmological models considered, quasars provide constraints in agreement with those derived with other standar","authors_text":"Jingzhao Qi, Marek Biesiada, Shuo Cao, Xiaogang Zheng, Xiaolei Li, Zong-Hong Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T16:35:33Z","title":"Testing and selecting cosmological models with ultra-compact radio quasars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08867","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":"sha256:3a0062611c4a7ea885be856b8cb04e2bdb1dcf6031c37b2f1f5efc3439bd4329","target":"record","created_at":"2026-05-18T00:26:45Z","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":"7c9239fb6ee45ce21e8c8999a75bfbf85492e635b2ae91d86c663c7600bc1ab7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T16:35:33Z","title_canon_sha256":"726bcabab67c006a90e257e60e46b779236ce36b002f5fc64da170b60a64d9a9"},"schema_version":"1.0","source":{"id":"1708.08867","kind":"arxiv","version":1}},"canonical_sha256":"672c4c3a821d2b1691eff4249fc4d19257e90db08611ba11f6cbd51089083c06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"672c4c3a821d2b1691eff4249fc4d19257e90db08611ba11f6cbd51089083c06","first_computed_at":"2026-05-18T00:26:45.755584Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:45.755584Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K6Be1uWkKLBvu5Z4Idkf6co5dJwCJ/T3Bng8XPLPOtkjhR379LhgBsjzKrCDt98Md/hxOvSFUJkwy3w/nk69Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:45.756261Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.08867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a0062611c4a7ea885be856b8cb04e2bdb1dcf6031c37b2f1f5efc3439bd4329","sha256:898ce3bc3c0819c750a7e675a3952d5b1a6bcf80aa6ffdf0b66ce3947637b5cc"],"state_sha256":"8c42a7dccd33c516474b1dc59d0e54c854375eda97c326f456e4055dfd7c1b86"}