{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M4F4LSFCD3ZYF3SN3EF5FGMDOC","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":"9ac3aa723d2823c3b24f03569e33e12cd20ef77ee01fe6f9e4e5d6b69b6b7232","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-23T12:49:51Z","title_canon_sha256":"3e3f2bae4dee2c1a42c9a396b2335d75489bff7a22f33a91f285ab4139b8759e"},"schema_version":"1.0","source":{"id":"1804.08379","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08379","created_at":"2026-05-17T23:51:19Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08379v3","created_at":"2026-05-17T23:51:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08379","created_at":"2026-05-17T23:51:19Z"},{"alias_kind":"pith_short_12","alias_value":"M4F4LSFCD3ZY","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M4F4LSFCD3ZYF3SN","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M4F4LSFC","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:8e41487e7449e5dfa0a6b1776475daaef8adffaa948db1d014cc26e2856fb629","target":"graph","created_at":"2026-05-17T23:51:19Z","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":"Detection of gravitational waves produced by merger of binary compact objects could provide an independent way for measuring the luminosity distance to the gravitational-wave burst source, indicating that gravitational-wave observation, combined with observation of electromagnetic counterparts, can provide \"standard sirens\" for investigating the expansion history of the universe in cosmology. In this work, we wish to investigate how the future gravitational-wave standard siren observations would break the parameter degeneracies existing in the conventional optical observations and how they hel","authors_text":"Jing-Fei Zhang, Ling-Feng Wang, Xin Zhang, Xuan-Neng Zhang","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-23T12:49:51Z","title":"Improving cosmological parameter estimation with the future gravitational-wave standard siren observation from the Einstein Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08379","kind":"arxiv","version":3},"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":"sha256:03a6e273c80fed4a1eeff558e385b54c89ba6d4738af33f87787c53adb629aaf","target":"record","created_at":"2026-05-17T23:51:19Z","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":"9ac3aa723d2823c3b24f03569e33e12cd20ef77ee01fe6f9e4e5d6b69b6b7232","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-04-23T12:49:51Z","title_canon_sha256":"3e3f2bae4dee2c1a42c9a396b2335d75489bff7a22f33a91f285ab4139b8759e"},"schema_version":"1.0","source":{"id":"1804.08379","kind":"arxiv","version":3}},"canonical_sha256":"670bc5c8a21ef382ee4dd90bd2998370a7dd262b7e2e8fca7942c6cbe175d71c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"670bc5c8a21ef382ee4dd90bd2998370a7dd262b7e2e8fca7942c6cbe175d71c","first_computed_at":"2026-05-17T23:51:19.861246Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:19.861246Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K+plZjGgLoZvxJ1Ws8kM/hwf5yxzYYhAXmTBgbhT3pNPK805evfGaao8TvRmnMc5GSUst8htBouO7T55t/s8AQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:19.861871Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.08379","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03a6e273c80fed4a1eeff558e385b54c89ba6d4738af33f87787c53adb629aaf","sha256:8e41487e7449e5dfa0a6b1776475daaef8adffaa948db1d014cc26e2856fb629"],"state_sha256":"88b168607550aa32c8a41eb46b951e758872f9e27c4199f54edea13d4cff7f58"}