{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GGH2WXJG2LVX7TOAIXK3V6P5P7","short_pith_number":"pith:GGH2WXJG","canonical_record":{"source":{"id":"1808.09925","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-08-29T16:55:20Z","cross_cats_sorted":[],"title_canon_sha256":"521e7977fd3e3e3be070267ba18c1a3f4ac0b24c693112dd66e2b99c80e449b7","abstract_canon_sha256":"10809f539fdfd6a27cd8ec0fad6c2ef8b55f99154da99732430f95776b0956bc"},"schema_version":"1.0"},"canonical_sha256":"318fab5d26d2eb7fcdc045d5baf9fd7fcfe7ddea6ded88d2133dfe90149af65e","source":{"kind":"arxiv","id":"1808.09925","version":6},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09925","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09925v6","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09925","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"pith_short_12","alias_value":"GGH2WXJG2LVX","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GGH2WXJG2LVX7TOA","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GGH2WXJG","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GGH2WXJG2LVX7TOAIXK3V6P5P7","target":"record","payload":{"canonical_record":{"source":{"id":"1808.09925","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-08-29T16:55:20Z","cross_cats_sorted":[],"title_canon_sha256":"521e7977fd3e3e3be070267ba18c1a3f4ac0b24c693112dd66e2b99c80e449b7","abstract_canon_sha256":"10809f539fdfd6a27cd8ec0fad6c2ef8b55f99154da99732430f95776b0956bc"},"schema_version":"1.0"},"canonical_sha256":"318fab5d26d2eb7fcdc045d5baf9fd7fcfe7ddea6ded88d2133dfe90149af65e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:09.407407Z","signature_b64":"0NYwAz/NquV4Khl6kMjLC8ZNgfAKZYf6kCCIxL/3/dX9l8CDGf7clZ4DB38SNl4cJr/5uVDTvNYf0ciiQjBXAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"318fab5d26d2eb7fcdc045d5baf9fd7fcfe7ddea6ded88d2133dfe90149af65e","last_reissued_at":"2026-05-17T23:43:09.406852Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:09.406852Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.09925","source_version":6,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n/9KmkLNOk4aOL06SK7KVLIaIF3JrOKPnZ1hYSBCGmxOTJ1ZxCUmzDtmeySe6griH4p29hRskEyrfDIVfwIaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:33:29.150769Z"},"content_sha256":"5c75a91e90bff7660dbc70cc02543bb86b1b226287b1ccc82311e7161268e39d","schema_version":"1.0","event_id":"sha256:5c75a91e90bff7660dbc70cc02543bb86b1b226287b1ccc82311e7161268e39d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GGH2WXJG2LVX7TOAIXK3V6P5P7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Test of Einstein's Equivalence Principle by Galactic Dark Matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Adam Archibald, Dawson Huth, Kasey Wagoner, Maneesh Jeyakumar, Michael Abercrombie, Nadathur Krishnan, Ramanath Cowsik, Tsitsi Madziwa-Nussinov","submitted_at":"2018-08-29T16:55:20Z","abstract_excerpt":"We report here the results of operation of a torsion balance with a period of $\\sim 1.27 \\times 10^4$ s. The analysis of data collected over a period of $\\sim$115 days shows that the difference in the accelerations towards the Galactic Center of test bodies made of aluminum and quartz was $(0.61 \\pm 1.27) \\times 10^{-15} \\, \\mathrm{ m \\, s}^{-2}$. This sets a bound on the violation of the equivalence principle by forces exerted by Galactic dark matter which is expressed by the E\\\"otv\\\"os parameter $\\eta_{DM} = (1.32 \\pm 2.68) \\times 10^{-5}$, a significant improvement upon earlier bounds."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09925","kind":"arxiv","version":6},"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":"2026-05-17T23:43:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SVIQ2I2j9tBaxzy9OdCNFOVEYrXKFgXzhiNvD/k9MTgLRQ63nvy558hUSpWHH8dnb69kkTWSiu3ao77g+4isDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:33:29.151108Z"},"content_sha256":"cb9812309862f0bdf395950e85520543e9aad32e814d512317b8ccc6d50d9875","schema_version":"1.0","event_id":"sha256:cb9812309862f0bdf395950e85520543e9aad32e814d512317b8ccc6d50d9875"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/bundle.json","state_url":"https://pith.science/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/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":"2026-06-01T21:33:29Z","links":{"resolver":"https://pith.science/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7","bundle":"https://pith.science/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/bundle.json","state":"https://pith.science/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GGH2WXJG2LVX7TOAIXK3V6P5P7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GGH2WXJG2LVX7TOAIXK3V6P5P7","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":"10809f539fdfd6a27cd8ec0fad6c2ef8b55f99154da99732430f95776b0956bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-08-29T16:55:20Z","title_canon_sha256":"521e7977fd3e3e3be070267ba18c1a3f4ac0b24c693112dd66e2b99c80e449b7"},"schema_version":"1.0","source":{"id":"1808.09925","kind":"arxiv","version":6}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09925","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09925v6","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09925","created_at":"2026-05-17T23:43:09Z"},{"alias_kind":"pith_short_12","alias_value":"GGH2WXJG2LVX","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GGH2WXJG2LVX7TOA","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GGH2WXJG","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:cb9812309862f0bdf395950e85520543e9aad32e814d512317b8ccc6d50d9875","target":"graph","created_at":"2026-05-17T23:43:09Z","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":"We report here the results of operation of a torsion balance with a period of $\\sim 1.27 \\times 10^4$ s. The analysis of data collected over a period of $\\sim$115 days shows that the difference in the accelerations towards the Galactic Center of test bodies made of aluminum and quartz was $(0.61 \\pm 1.27) \\times 10^{-15} \\, \\mathrm{ m \\, s}^{-2}$. This sets a bound on the violation of the equivalence principle by forces exerted by Galactic dark matter which is expressed by the E\\\"otv\\\"os parameter $\\eta_{DM} = (1.32 \\pm 2.68) \\times 10^{-5}$, a significant improvement upon earlier bounds.","authors_text":"Adam Archibald, Dawson Huth, Kasey Wagoner, Maneesh Jeyakumar, Michael Abercrombie, Nadathur Krishnan, Ramanath Cowsik, Tsitsi Madziwa-Nussinov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-08-29T16:55:20Z","title":"Test of Einstein's Equivalence Principle by Galactic Dark Matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09925","kind":"arxiv","version":6},"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":"sha256:5c75a91e90bff7660dbc70cc02543bb86b1b226287b1ccc82311e7161268e39d","target":"record","created_at":"2026-05-17T23:43:09Z","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":"10809f539fdfd6a27cd8ec0fad6c2ef8b55f99154da99732430f95776b0956bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-08-29T16:55:20Z","title_canon_sha256":"521e7977fd3e3e3be070267ba18c1a3f4ac0b24c693112dd66e2b99c80e449b7"},"schema_version":"1.0","source":{"id":"1808.09925","kind":"arxiv","version":6}},"canonical_sha256":"318fab5d26d2eb7fcdc045d5baf9fd7fcfe7ddea6ded88d2133dfe90149af65e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"318fab5d26d2eb7fcdc045d5baf9fd7fcfe7ddea6ded88d2133dfe90149af65e","first_computed_at":"2026-05-17T23:43:09.406852Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:09.406852Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0NYwAz/NquV4Khl6kMjLC8ZNgfAKZYf6kCCIxL/3/dX9l8CDGf7clZ4DB38SNl4cJr/5uVDTvNYf0ciiQjBXAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:09.407407Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.09925","source_kind":"arxiv","source_version":6}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c75a91e90bff7660dbc70cc02543bb86b1b226287b1ccc82311e7161268e39d","sha256:cb9812309862f0bdf395950e85520543e9aad32e814d512317b8ccc6d50d9875"],"state_sha256":"52017fb9dcbb45f164dc4df4a631027555615fb1415b2eb05b93798792161f08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3LIHQyu+euuEYutidszqbLwTegIm4GN0lE08SP/X5+d3BGjYZNOrN7gukig4wz0GY/eoRQUQhkxCDLB53h1xCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T21:33:29.152968Z","bundle_sha256":"97dbd42ccf21675fbe764d0496b000a85a64a964f765320f6ed5304e88a97bff"}}