{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:QIRAC37RCBQMIBSDT5MITBCEVV","short_pith_number":"pith:QIRAC37R","canonical_record":{"source":{"id":"1708.08635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T08:25:59Z","cross_cats_sorted":[],"title_canon_sha256":"31efa20323e91e315a04250e4ca3eb8f9ef87d9a69f7130b880a4f4c037f1a02","abstract_canon_sha256":"53bb96d90885534ada778d21bd3fcfcf1f7cd237c4fa508d1ad40e2889452ff5"},"schema_version":"1.0"},"canonical_sha256":"8222016ff11060c406439f58898444ad65227d7ab4e06c77e0fbc60f5fcae213","source":{"kind":"arxiv","id":"1708.08635","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08635","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08635v1","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08635","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"pith_short_12","alias_value":"QIRAC37RCBQM","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QIRAC37RCBQMIBSD","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QIRAC37R","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:QIRAC37RCBQMIBSDT5MITBCEVV","target":"record","payload":{"canonical_record":{"source":{"id":"1708.08635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T08:25:59Z","cross_cats_sorted":[],"title_canon_sha256":"31efa20323e91e315a04250e4ca3eb8f9ef87d9a69f7130b880a4f4c037f1a02","abstract_canon_sha256":"53bb96d90885534ada778d21bd3fcfcf1f7cd237c4fa508d1ad40e2889452ff5"},"schema_version":"1.0"},"canonical_sha256":"8222016ff11060c406439f58898444ad65227d7ab4e06c77e0fbc60f5fcae213","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:04.488720Z","signature_b64":"67SzxW2k1+9OQXd3SzQpWV204EjeLYWkTxyVIvXw//wD09T8MlAVQxVwu3SoaRWOjpXLdep1o8UCvLPUTeLpBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8222016ff11060c406439f58898444ad65227d7ab4e06c77e0fbc60f5fcae213","last_reissued_at":"2026-05-18T00:34:04.487895Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:04.487895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.08635","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":"2026-05-18T00:34:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hu32Q+2ZBKqp3+U0HIV3rL/bButWM712zlXF957gcIfJKtpq0nZqFsZPXghUIPf0hmMw25ZxhsaVJEYq1gSQCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:16:35.846214Z"},"content_sha256":"5677ced422d923cca35e86f94b8abdf892368a84c49653c7abce70a519395eb8","schema_version":"1.0","event_id":"sha256:5677ced422d923cca35e86f94b8abdf892368a84c49653c7abce70a519395eb8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:QIRAC37RCBQMIBSDT5MITBCEVV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-compact structure in intermediate-luminosity radio quasars: building a sample of standard cosmological rulers and improving the dark energy constraints up to $z\\sim 3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jingzhao Qi, Marek Biesiada, Shuo Cao, Xiaogang Zheng, Yun Chen, Zong-Hong Zhu","submitted_at":"2017-08-29T08:25:59Z","abstract_excerpt":"In this paper, we present a new compiled milliarcsecond compact radio data set of 120 intermediate-luminosity quasars in the redshift range $0.46< z <2.76$. These quasars show negligible dependence on redshifts and intrinsic luminosity, and thus represents, in the standard model of cosmology, a fixed comoving-length of standard ruler. We implement a new cosmology-independent technique to calibrate the linear size of of this standard ruler as $l_m= 11.03\\pm0.25$ pc, which is the typical radius at which AGN jets become opaque at the observed frequency $\\nu\\sim 2$ GHz. In the framework of flat $\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08635","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":"2026-05-18T00:34:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SAOqTnLKCNpvPqiH5NwfmgzD+GDlmcIYkrfgE45bT1yJq1DyzrZ5mM0itbyiLuaMVtI9zPihI0Rav1o6jhRdDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:16:35.846572Z"},"content_sha256":"906bf1a50a2ffd4e350491783f20e4bb3ab82811e9bcc8a43e3dd696c1fee8a4","schema_version":"1.0","event_id":"sha256:906bf1a50a2ffd4e350491783f20e4bb3ab82811e9bcc8a43e3dd696c1fee8a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QIRAC37RCBQMIBSDT5MITBCEVV/bundle.json","state_url":"https://pith.science/pith/QIRAC37RCBQMIBSDT5MITBCEVV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QIRAC37RCBQMIBSDT5MITBCEVV/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":"2026-06-02T15:16:35Z","links":{"resolver":"https://pith.science/pith/QIRAC37RCBQMIBSDT5MITBCEVV","bundle":"https://pith.science/pith/QIRAC37RCBQMIBSDT5MITBCEVV/bundle.json","state":"https://pith.science/pith/QIRAC37RCBQMIBSDT5MITBCEVV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QIRAC37RCBQMIBSDT5MITBCEVV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QIRAC37RCBQMIBSDT5MITBCEVV","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":"53bb96d90885534ada778d21bd3fcfcf1f7cd237c4fa508d1ad40e2889452ff5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T08:25:59Z","title_canon_sha256":"31efa20323e91e315a04250e4ca3eb8f9ef87d9a69f7130b880a4f4c037f1a02"},"schema_version":"1.0","source":{"id":"1708.08635","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08635","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08635v1","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08635","created_at":"2026-05-18T00:34:04Z"},{"alias_kind":"pith_short_12","alias_value":"QIRAC37RCBQM","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QIRAC37RCBQMIBSD","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QIRAC37R","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:906bf1a50a2ffd4e350491783f20e4bb3ab82811e9bcc8a43e3dd696c1fee8a4","target":"graph","created_at":"2026-05-18T00:34:04Z","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 present a new compiled milliarcsecond compact radio data set of 120 intermediate-luminosity quasars in the redshift range $0.46< z <2.76$. These quasars show negligible dependence on redshifts and intrinsic luminosity, and thus represents, in the standard model of cosmology, a fixed comoving-length of standard ruler. We implement a new cosmology-independent technique to calibrate the linear size of of this standard ruler as $l_m= 11.03\\pm0.25$ pc, which is the typical radius at which AGN jets become opaque at the observed frequency $\\nu\\sim 2$ GHz. In the framework of flat $\\","authors_text":"Jingzhao Qi, Marek Biesiada, Shuo Cao, Xiaogang Zheng, Yun Chen, Zong-Hong Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T08:25:59Z","title":"Ultra-compact structure in intermediate-luminosity radio quasars: building a sample of standard cosmological rulers and improving the dark energy constraints up to $z\\sim 3$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08635","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":"sha256:5677ced422d923cca35e86f94b8abdf892368a84c49653c7abce70a519395eb8","target":"record","created_at":"2026-05-18T00:34:04Z","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":"53bb96d90885534ada778d21bd3fcfcf1f7cd237c4fa508d1ad40e2889452ff5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-08-29T08:25:59Z","title_canon_sha256":"31efa20323e91e315a04250e4ca3eb8f9ef87d9a69f7130b880a4f4c037f1a02"},"schema_version":"1.0","source":{"id":"1708.08635","kind":"arxiv","version":1}},"canonical_sha256":"8222016ff11060c406439f58898444ad65227d7ab4e06c77e0fbc60f5fcae213","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8222016ff11060c406439f58898444ad65227d7ab4e06c77e0fbc60f5fcae213","first_computed_at":"2026-05-18T00:34:04.487895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:04.487895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"67SzxW2k1+9OQXd3SzQpWV204EjeLYWkTxyVIvXw//wD09T8MlAVQxVwu3SoaRWOjpXLdep1o8UCvLPUTeLpBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:04.488720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.08635","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5677ced422d923cca35e86f94b8abdf892368a84c49653c7abce70a519395eb8","sha256:906bf1a50a2ffd4e350491783f20e4bb3ab82811e9bcc8a43e3dd696c1fee8a4"],"state_sha256":"062c15e320c87e56107a59bb9ab980e91202b789fe36cc6c5c2638016d2ef030"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VcXD1H3DPLv90R8uc36XsVPzjvePQm/tUaztxE1eDlWb6ESeszrdYIkvX8atfnaRgq5MBaD+IKu21CRRNJgyCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:16:35.848518Z","bundle_sha256":"76a2170d3805640b6424ee8cbb3fc68e5047fa80fbca1039f1a84eb4b98bc366"}}