{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:RYAFOXSL76QW2WVSKCWO3V2JEP","short_pith_number":"pith:RYAFOXSL","canonical_record":{"source":{"id":"1507.02517","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-09T14:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"3e91e2cb8e0a772599faa4f7f06d8c848ecaab599e19433029fd590ce06c049b","abstract_canon_sha256":"90ce2564556cd038576384042f651a07aef80b227bf76ef2160f0fe22d37c87d"},"schema_version":"1.0"},"canonical_sha256":"8e00575e4bffa16d5ab250acedd74923f0d8521dae527f095d6c151032943fc7","source":{"kind":"arxiv","id":"1507.02517","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02517","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02517v1","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02517","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"pith_short_12","alias_value":"RYAFOXSL76QW","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RYAFOXSL76QW2WVS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RYAFOXSL","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:RYAFOXSL76QW2WVSKCWO3V2JEP","target":"record","payload":{"canonical_record":{"source":{"id":"1507.02517","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-09T14:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"3e91e2cb8e0a772599faa4f7f06d8c848ecaab599e19433029fd590ce06c049b","abstract_canon_sha256":"90ce2564556cd038576384042f651a07aef80b227bf76ef2160f0fe22d37c87d"},"schema_version":"1.0"},"canonical_sha256":"8e00575e4bffa16d5ab250acedd74923f0d8521dae527f095d6c151032943fc7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:06.479381Z","signature_b64":"ecCTs5zZ4EelBRyNldzwX5y6/9y18qcNiVXS2+96Q9glWYg09eBjO0g1q5gd6/hS3A1GCWg2CLTq+sLQQeydDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e00575e4bffa16d5ab250acedd74923f0d8521dae527f095d6c151032943fc7","last_reissued_at":"2026-05-18T01:37:06.478701Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:06.478701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.02517","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"09YKPrDRLpP/LJta4GauWNCoVKClPcgmGpFFwzHi7P0zDYwybA6yWhBiM7r5CSXYBQ12Q9CP3T7fRS4O4n00AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T09:31:59.507400Z"},"content_sha256":"6cd69320f9ef32b75c90cb65dd1e487f52c6be5c9dd044b118e0d44541150cfa","schema_version":"1.0","event_id":"sha256:6cd69320f9ef32b75c90cb65dd1e487f52c6be5c9dd044b118e0d44541150cfa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:RYAFOXSL76QW2WVSKCWO3V2JEP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Utility of observational Hubble parameter data on dark energy evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Shi-Yu Li, Tong-Jie Zhang, Xiao-Lei Meng, Xin Wang","submitted_at":"2015-07-09T14:13:37Z","abstract_excerpt":"Aiming at exploring the nature of dark energy, we use thirty-six observational Hubble parameter data (OHD) in the redshift range $0 \\leqslant z \\leqslant 2.36$ to make a cosmological model-independent test of the two-point $Omh^2(z_{2};z_{1})$ diagnostic. In $\\Lambda$CDM, we have $Omh^2 \\equiv \\Omega_{m}h^2$, where $\\Omega_{m}$ is the matter density parameter at present. We bin all the OHD into four data points to mitigate the observational contaminations. By comparing with the value of $\\Omega_{m}h^2$ which is constrained tightly by the Planck observations, our results show that in all six te"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02517","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xsm77eWRxGWqHQZvgDLu+V2h96zOs9LQDuRn2JqJgMXRJZ+GeESkhTBS7dpXvkh93CwllN/P0kVkehlL+EgbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T09:31:59.507773Z"},"content_sha256":"518f44594ea378d665ecc6a5be9df6cec8193aa7e18160f3582a77a098adb590","schema_version":"1.0","event_id":"sha256:518f44594ea378d665ecc6a5be9df6cec8193aa7e18160f3582a77a098adb590"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/bundle.json","state_url":"https://pith.science/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-12T09:31:59Z","links":{"resolver":"https://pith.science/pith/RYAFOXSL76QW2WVSKCWO3V2JEP","bundle":"https://pith.science/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/bundle.json","state":"https://pith.science/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RYAFOXSL76QW2WVSKCWO3V2JEP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RYAFOXSL76QW2WVSKCWO3V2JEP","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":"90ce2564556cd038576384042f651a07aef80b227bf76ef2160f0fe22d37c87d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-09T14:13:37Z","title_canon_sha256":"3e91e2cb8e0a772599faa4f7f06d8c848ecaab599e19433029fd590ce06c049b"},"schema_version":"1.0","source":{"id":"1507.02517","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02517","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02517v1","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02517","created_at":"2026-05-18T01:37:06Z"},{"alias_kind":"pith_short_12","alias_value":"RYAFOXSL76QW","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RYAFOXSL76QW2WVS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RYAFOXSL","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:518f44594ea378d665ecc6a5be9df6cec8193aa7e18160f3582a77a098adb590","target":"graph","created_at":"2026-05-18T01:37:06Z","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"},"paper":{"abstract_excerpt":"Aiming at exploring the nature of dark energy, we use thirty-six observational Hubble parameter data (OHD) in the redshift range $0 \\leqslant z \\leqslant 2.36$ to make a cosmological model-independent test of the two-point $Omh^2(z_{2};z_{1})$ diagnostic. In $\\Lambda$CDM, we have $Omh^2 \\equiv \\Omega_{m}h^2$, where $\\Omega_{m}$ is the matter density parameter at present. We bin all the OHD into four data points to mitigate the observational contaminations. By comparing with the value of $\\Omega_{m}h^2$ which is constrained tightly by the Planck observations, our results show that in all six te","authors_text":"Shi-Yu Li, Tong-Jie Zhang, Xiao-Lei Meng, Xin Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-09T14:13:37Z","title":"Utility of observational Hubble parameter data on dark energy evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02517","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":"sha256:6cd69320f9ef32b75c90cb65dd1e487f52c6be5c9dd044b118e0d44541150cfa","target":"record","created_at":"2026-05-18T01:37:06Z","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":"90ce2564556cd038576384042f651a07aef80b227bf76ef2160f0fe22d37c87d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-09T14:13:37Z","title_canon_sha256":"3e91e2cb8e0a772599faa4f7f06d8c848ecaab599e19433029fd590ce06c049b"},"schema_version":"1.0","source":{"id":"1507.02517","kind":"arxiv","version":1}},"canonical_sha256":"8e00575e4bffa16d5ab250acedd74923f0d8521dae527f095d6c151032943fc7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e00575e4bffa16d5ab250acedd74923f0d8521dae527f095d6c151032943fc7","first_computed_at":"2026-05-18T01:37:06.478701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:06.478701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ecCTs5zZ4EelBRyNldzwX5y6/9y18qcNiVXS2+96Q9glWYg09eBjO0g1q5gd6/hS3A1GCWg2CLTq+sLQQeydDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:06.479381Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.02517","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6cd69320f9ef32b75c90cb65dd1e487f52c6be5c9dd044b118e0d44541150cfa","sha256:518f44594ea378d665ecc6a5be9df6cec8193aa7e18160f3582a77a098adb590"],"state_sha256":"dd049fb9cfa3f6452e2504b3b20b6cac62eeb6c6c164b984b18a8b5d299d19cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KDnpqCNwe1p8zuaSpvGYycAlsaF8A3uV485ADwfo8LUeiRg9ysisiyebeI3gvXbUii2OzAsEIZuFidU6SzzHBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T09:31:59.510189Z","bundle_sha256":"81aed47943022a20000fffdbb4e7d6fae72fc3567573501f000cfe51fdf877e8"}}