{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:EERFGPSAX6I2YSCJHZFIDUXAFJ","short_pith_number":"pith:EERFGPSA","canonical_record":{"source":{"id":"2103.07139","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-12T08:25:11Z","cross_cats_sorted":[],"title_canon_sha256":"db07ecb66573f67fac9efa35157d95068aada01616aca645336b99888851974b","abstract_canon_sha256":"4b6a87f820bb88a7f5aa15243d8dd0191fe55f76a36ed16477f780adfb1716cf"},"schema_version":"1.0"},"canonical_sha256":"2122533e40bf91ac48493e4a81d2e02a457a934f16d2c2f5423fd703b882cdc9","source":{"kind":"arxiv","id":"2103.07139","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.07139","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"arxiv_version","alias_value":"2103.07139v1","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.07139","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_12","alias_value":"EERFGPSAX6I2","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_16","alias_value":"EERFGPSAX6I2YSCJ","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_8","alias_value":"EERFGPSA","created_at":"2026-07-05T02:22:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:EERFGPSAX6I2YSCJHZFIDUXAFJ","target":"record","payload":{"canonical_record":{"source":{"id":"2103.07139","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-12T08:25:11Z","cross_cats_sorted":[],"title_canon_sha256":"db07ecb66573f67fac9efa35157d95068aada01616aca645336b99888851974b","abstract_canon_sha256":"4b6a87f820bb88a7f5aa15243d8dd0191fe55f76a36ed16477f780adfb1716cf"},"schema_version":"1.0"},"canonical_sha256":"2122533e40bf91ac48493e4a81d2e02a457a934f16d2c2f5423fd703b882cdc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:22:29.078304Z","signature_b64":"T0MjnSmWjOq6+OnoPHo+wPYHdyUbYnMsORymB67zk+ZjR2DnKf3EPrw27mjuf21hnducIjC/Ec6WlvLQyKdBDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2122533e40bf91ac48493e4a81d2e02a457a934f16d2c2f5423fd703b882cdc9","last_reissued_at":"2026-07-05T02:22:29.077864Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:22:29.077864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.07139","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":"2026-07-05T02:22:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"toHp25fyUCk5rfLbb6h5t8OjEV0HIiG+UWJPZ+2VudoKhzdcrUzVUMzVvAmu+HdlFxRNCmeDaXAXU0Qm+2fJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:40:43.334789Z"},"content_sha256":"066d535a0256df57b9a87a3c5aa3a899ce252500c959249cf28191552f9447b7","schema_version":"1.0","event_id":"sha256:066d535a0256df57b9a87a3c5aa3a899ce252500c959249cf28191552f9447b7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:EERFGPSAX6I2YSCJHZFIDUXAFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multiple measurements of quasars acting as standard probes: model independent calibration and exploring the Dark Energy Equation of States","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Marek Biesiada, Shuo Cao, Tonghua Liu, Xiaogang Zheng, Xiaolei Li, Yuting Liu","submitted_at":"2021-03-12T08:25:11Z","abstract_excerpt":"Recently, two classes of quasar samples were identified, which are promising as new cosmological probes extending to higher redshifts. The first sample uses the nonlinear relation between the ultraviolet and X-ray luminosities of quasars to derive luminosity distances, whereas the linear sizes of compact radio quasars in the second sample can serve as standardized rulers, providing angular-diameter distances. In this study, under the assumption of a flat universe, we refreshed the calibration of multiple measurements of high-redshift quasars (in the framework of a cosmological-model-independen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.07139","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2103.07139/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:22:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oxS/DPjGdwBvxVA3+jehTFWrpf5GBcbVxVK7EqLgiW2siy6n5GoJqgaOD+AauMYRoHRA1e7+bXQfjfjw4ZDJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:40:43.335170Z"},"content_sha256":"67c9a393cd2cacc7989fee156496b4d4e7ca3854fd2b02928c461b26c5ec1fe5","schema_version":"1.0","event_id":"sha256:67c9a393cd2cacc7989fee156496b4d4e7ca3854fd2b02928c461b26c5ec1fe5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/bundle.json","state_url":"https://pith.science/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/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":"2026-07-07T14:40:43Z","links":{"resolver":"https://pith.science/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ","bundle":"https://pith.science/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/bundle.json","state":"https://pith.science/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EERFGPSAX6I2YSCJHZFIDUXAFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:EERFGPSAX6I2YSCJHZFIDUXAFJ","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":"4b6a87f820bb88a7f5aa15243d8dd0191fe55f76a36ed16477f780adfb1716cf","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-12T08:25:11Z","title_canon_sha256":"db07ecb66573f67fac9efa35157d95068aada01616aca645336b99888851974b"},"schema_version":"1.0","source":{"id":"2103.07139","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.07139","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"arxiv_version","alias_value":"2103.07139v1","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.07139","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_12","alias_value":"EERFGPSAX6I2","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_16","alias_value":"EERFGPSAX6I2YSCJ","created_at":"2026-07-05T02:22:29Z"},{"alias_kind":"pith_short_8","alias_value":"EERFGPSA","created_at":"2026-07-05T02:22:29Z"}],"graph_snapshots":[{"event_id":"sha256:67c9a393cd2cacc7989fee156496b4d4e7ca3854fd2b02928c461b26c5ec1fe5","target":"graph","created_at":"2026-07-05T02:22:29Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2103.07139/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recently, two classes of quasar samples were identified, which are promising as new cosmological probes extending to higher redshifts. The first sample uses the nonlinear relation between the ultraviolet and X-ray luminosities of quasars to derive luminosity distances, whereas the linear sizes of compact radio quasars in the second sample can serve as standardized rulers, providing angular-diameter distances. In this study, under the assumption of a flat universe, we refreshed the calibration of multiple measurements of high-redshift quasars (in the framework of a cosmological-model-independen","authors_text":"Marek Biesiada, Shuo Cao, Tonghua Liu, Xiaogang Zheng, Xiaolei Li, Yuting Liu","cross_cats":[],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-12T08:25:11Z","title":"Multiple measurements of quasars acting as standard probes: model independent calibration and exploring the Dark Energy Equation of States"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.07139","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":"sha256:066d535a0256df57b9a87a3c5aa3a899ce252500c959249cf28191552f9447b7","target":"record","created_at":"2026-07-05T02:22:29Z","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":"4b6a87f820bb88a7f5aa15243d8dd0191fe55f76a36ed16477f780adfb1716cf","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-12T08:25:11Z","title_canon_sha256":"db07ecb66573f67fac9efa35157d95068aada01616aca645336b99888851974b"},"schema_version":"1.0","source":{"id":"2103.07139","kind":"arxiv","version":1}},"canonical_sha256":"2122533e40bf91ac48493e4a81d2e02a457a934f16d2c2f5423fd703b882cdc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2122533e40bf91ac48493e4a81d2e02a457a934f16d2c2f5423fd703b882cdc9","first_computed_at":"2026-07-05T02:22:29.077864Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:22:29.077864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T0MjnSmWjOq6+OnoPHo+wPYHdyUbYnMsORymB67zk+ZjR2DnKf3EPrw27mjuf21hnducIjC/Ec6WlvLQyKdBDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:22:29.078304Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.07139","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:066d535a0256df57b9a87a3c5aa3a899ce252500c959249cf28191552f9447b7","sha256:67c9a393cd2cacc7989fee156496b4d4e7ca3854fd2b02928c461b26c5ec1fe5"],"state_sha256":"1bc10f3ccf3eb373028231fb89f3421cbc287c12a2f003a9f2a2dfd7f5a2858a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t72/wr3XvP0kn0WezwJJCnhKmF+TlBkzhMGb7sGobsqWiJ+PbzO35qBYHkXTWjvNgiNFiZTZAUI+zvRBrMIXAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T14:40:43.337202Z","bundle_sha256":"341c1c9501bea8c8cb218cdc0f88645f80a3098b19120e1429ade1ee19315b51"}}