{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:TJKLWJDREPBNEXAW6LHVF5S4HO","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":"fad9a867a1366d4ab09b05c7a1a24b3c9a9ee12ca549c210d61a1c9e65103aab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-04-03T15:52:44Z","title_canon_sha256":"8ea5c7cd2d154dd2f01567666f17ec0490d7437e2dca3f2825c0522252060769"},"schema_version":"1.0","source":{"id":"2004.01632","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.01632","created_at":"2026-07-05T01:26:51Z"},{"alias_kind":"arxiv_version","alias_value":"2004.01632v2","created_at":"2026-07-05T01:26:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.01632","created_at":"2026-07-05T01:26:51Z"},{"alias_kind":"pith_short_12","alias_value":"TJKLWJDREPBN","created_at":"2026-07-05T01:26:51Z"},{"alias_kind":"pith_short_16","alias_value":"TJKLWJDREPBNEXAW","created_at":"2026-07-05T01:26:51Z"},{"alias_kind":"pith_short_8","alias_value":"TJKLWJDR","created_at":"2026-07-05T01:26:51Z"}],"graph_snapshots":[{"event_id":"sha256:3179752f2c7b03bc6d21378cc395361cf0c234dd6af3dae2e9e0d75d0db58a20","target":"graph","created_at":"2026-07-05T01:26:51Z","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/2004.01632/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The direct detection of gravitational waves by the LIGO-Virgo collaboration has opened a new window with which to measure cosmological parameters such as the Hubble constant $H_0$, and also probe general relativity on large scales. In this paper we present a new phenomenological approach, together with its inferencial implementation, for measuring deviations from general relativity (GR) on cosmological scales concurrently with a determination of $H_0$. We consider gravitational waves (GWs) propagating in an expanding homogeneous and isotropic background, but with a modified friction term and d","authors_text":"D. Steer, M. Barsuglia, S. Mastrogiovanni","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-04-03T15:52:44Z","title":"Probing modified gravity theories and cosmology using gravitational-waves and associated electromagnetic counterparts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.01632","kind":"arxiv","version":2},"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":"sha256:23d93590da464d3c180aa87215c6b6b0fad98e9df79f0bf22c0b818232a04715","target":"record","created_at":"2026-07-05T01:26:51Z","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":"fad9a867a1366d4ab09b05c7a1a24b3c9a9ee12ca549c210d61a1c9e65103aab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-04-03T15:52:44Z","title_canon_sha256":"8ea5c7cd2d154dd2f01567666f17ec0490d7437e2dca3f2825c0522252060769"},"schema_version":"1.0","source":{"id":"2004.01632","kind":"arxiv","version":2}},"canonical_sha256":"9a54bb247123c2d25c16f2cf52f65c3ba67c1d6444d9d5829a700513d26b68c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a54bb247123c2d25c16f2cf52f65c3ba67c1d6444d9d5829a700513d26b68c9","first_computed_at":"2026-07-05T01:26:51.296269Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:26:51.296269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SDZrP+sfirrLXo7XlI+jI8gJfjiA9VMqBzGrcE+ZDmc7qa9+hWMTdoUS+wv2kMhIDF5+RIxEs2z6+RoklAWTCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:26:51.296697Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.01632","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23d93590da464d3c180aa87215c6b6b0fad98e9df79f0bf22c0b818232a04715","sha256:3179752f2c7b03bc6d21378cc395361cf0c234dd6af3dae2e9e0d75d0db58a20"],"state_sha256":"4cc7ad0b8261a2008365ccb8b2924f6568745b521b655d035e0a7a0c8995c852"}