{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:SPZJ36IXBAOEQTXR4O42ZSMIBX","short_pith_number":"pith:SPZJ36IX","canonical_record":{"source":{"id":"1607.06944","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-07-23T14:51:45Z","cross_cats_sorted":[],"title_canon_sha256":"f83fe60c388d7e45859d0495ac035cf0c26094ef073552aa515528cb7dbc150e","abstract_canon_sha256":"8e05ec24baf470604a74cd56e3b42a5567cf35dcf06047396cd1576e0747a51f"},"schema_version":"1.0"},"canonical_sha256":"93f29df917081c484ef1e3b9acc9880df3c4146451fa5fb326a1feb36082d6b7","source":{"kind":"arxiv","id":"1607.06944","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06944","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06944v1","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06944","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"pith_short_12","alias_value":"SPZJ36IXBAOE","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SPZJ36IXBAOEQTXR","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SPZJ36IX","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:SPZJ36IXBAOEQTXR4O42ZSMIBX","target":"record","payload":{"canonical_record":{"source":{"id":"1607.06944","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-07-23T14:51:45Z","cross_cats_sorted":[],"title_canon_sha256":"f83fe60c388d7e45859d0495ac035cf0c26094ef073552aa515528cb7dbc150e","abstract_canon_sha256":"8e05ec24baf470604a74cd56e3b42a5567cf35dcf06047396cd1576e0747a51f"},"schema_version":"1.0"},"canonical_sha256":"93f29df917081c484ef1e3b9acc9880df3c4146451fa5fb326a1feb36082d6b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:08.461687Z","signature_b64":"fb2g59edTmQXlzomISSLx2gFs0+9apOnoZn0SBK54T8wtyNA9a32657zxKVLrzHJVm596ljRhl8+b3OuSP6rDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93f29df917081c484ef1e3b9acc9880df3c4146451fa5fb326a1feb36082d6b7","last_reissued_at":"2026-05-18T01:08:08.461239Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:08.461239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.06944","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":"2026-05-18T01:08:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FDf94cO1qOrVhRXWPFI4KiLR4VZXcg3Or8gHpmRhhh8r5lFlUheC3teTreK1WjVcJAvnxXRc/pld6o1RV+urAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T10:36:11.378384Z"},"content_sha256":"8311949e9ae80d9c624e3f47baacf721f0de5054d27d52a3fa8b6552450220b3","schema_version":"1.0","event_id":"sha256:8311949e9ae80d9c624e3f47baacf721f0de5054d27d52a3fa8b6552450220b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:SPZJ36IXBAOEQTXR4O42ZSMIBX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Alexander J. Poyneer, James M. Overduin, Jonas P. Pereira","submitted_at":"2016-07-23T14:51:45Z","abstract_excerpt":"The proposed Satellite Test of the Equivalence Principle (STEP) will detect possible violations of the Weak Equivalence Principle by measuring relative accelerations between test masses of different composition with a precision of one part in $10^{18}$. A serendipitous byproduct of the experimental design is that the absolute (common-mode) acceleration of the test masses is also measured to high precision as they oscillate along a common axis under the influence of restoring forces produced by the position sensor currents, which in drag-free mode lead to Newtonian accelerations as small as $10"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06944","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":"2026-05-18T01:08:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0VM7qFiUEBcveRn+RPOSWLy2kvxoAlgeZeOEv004alYo0dWiY96XH9DqqhzfTiZb6RvHX71Yrk1X79Z006fJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T10:36:11.378721Z"},"content_sha256":"af31c7eb1734dc7db94115837eb6b6291d53348cafc9107c311724fe0f4c20b9","schema_version":"1.0","event_id":"sha256:af31c7eb1734dc7db94115837eb6b6291d53348cafc9107c311724fe0f4c20b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/bundle.json","state_url":"https://pith.science/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/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":"2026-06-30T10:36:11Z","links":{"resolver":"https://pith.science/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX","bundle":"https://pith.science/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/bundle.json","state":"https://pith.science/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SPZJ36IXBAOEQTXR4O42ZSMIBX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:SPZJ36IXBAOEQTXR4O42ZSMIBX","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":"8e05ec24baf470604a74cd56e3b42a5567cf35dcf06047396cd1576e0747a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-07-23T14:51:45Z","title_canon_sha256":"f83fe60c388d7e45859d0495ac035cf0c26094ef073552aa515528cb7dbc150e"},"schema_version":"1.0","source":{"id":"1607.06944","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06944","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06944v1","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06944","created_at":"2026-05-18T01:08:08Z"},{"alias_kind":"pith_short_12","alias_value":"SPZJ36IXBAOE","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SPZJ36IXBAOEQTXR","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SPZJ36IX","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:af31c7eb1734dc7db94115837eb6b6291d53348cafc9107c311724fe0f4c20b9","target":"graph","created_at":"2026-05-18T01:08:08Z","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":"The proposed Satellite Test of the Equivalence Principle (STEP) will detect possible violations of the Weak Equivalence Principle by measuring relative accelerations between test masses of different composition with a precision of one part in $10^{18}$. A serendipitous byproduct of the experimental design is that the absolute (common-mode) acceleration of the test masses is also measured to high precision as they oscillate along a common axis under the influence of restoring forces produced by the position sensor currents, which in drag-free mode lead to Newtonian accelerations as small as $10","authors_text":"Alexander J. Poyneer, James M. Overduin, Jonas P. Pereira","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-07-23T14:51:45Z","title":"Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06944","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":"sha256:8311949e9ae80d9c624e3f47baacf721f0de5054d27d52a3fa8b6552450220b3","target":"record","created_at":"2026-05-18T01:08:08Z","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":"8e05ec24baf470604a74cd56e3b42a5567cf35dcf06047396cd1576e0747a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-07-23T14:51:45Z","title_canon_sha256":"f83fe60c388d7e45859d0495ac035cf0c26094ef073552aa515528cb7dbc150e"},"schema_version":"1.0","source":{"id":"1607.06944","kind":"arxiv","version":1}},"canonical_sha256":"93f29df917081c484ef1e3b9acc9880df3c4146451fa5fb326a1feb36082d6b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93f29df917081c484ef1e3b9acc9880df3c4146451fa5fb326a1feb36082d6b7","first_computed_at":"2026-05-18T01:08:08.461239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:08.461239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fb2g59edTmQXlzomISSLx2gFs0+9apOnoZn0SBK54T8wtyNA9a32657zxKVLrzHJVm596ljRhl8+b3OuSP6rDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:08.461687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.06944","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8311949e9ae80d9c624e3f47baacf721f0de5054d27d52a3fa8b6552450220b3","sha256:af31c7eb1734dc7db94115837eb6b6291d53348cafc9107c311724fe0f4c20b9"],"state_sha256":"c91014a07e572951901305fc3de1b34152450f7094bfa8290f9681144af160d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LmswURPkL/g8k+5bZ9lVsKp1Kunxdv8MtRrjuazY8S+s835pTMlripWRxlaiDDJhPpyEM+T2T2f1oF0SwYb4Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-30T10:36:11.380557Z","bundle_sha256":"eed09cc5d3aa55a21ebd005cc35d8e8f1674e315db17fb6af0968a1a4792e478"}}