{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:MYV4JOEBJMLQRMJ2KJHYKPAXCK","short_pith_number":"pith:MYV4JOEB","canonical_record":{"source":{"id":"1904.09084","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-04-19T05:31:03Z","cross_cats_sorted":["physics.geo-ph","physics.ins-det"],"title_canon_sha256":"f6becc3408303b717afdceb6cd7f7f166904c1acf97b342936f82dbf5a03b792","abstract_canon_sha256":"5c636799f4c8790cfa57aef939fafe94d516e096ba52768652ee892e0b189dfb"},"schema_version":"1.0"},"canonical_sha256":"662bc4b8814b1708b13a524f853c1712b7ccbe4838af2801d4f6efa67320b8a6","source":{"kind":"arxiv","id":"1904.09084","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.09084","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1904.09084v4","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.09084","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"MYV4JOEBJMLQ","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_16","alias_value":"MYV4JOEBJMLQRMJ2","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_8","alias_value":"MYV4JOEB","created_at":"2026-07-05T00:02:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:MYV4JOEBJMLQRMJ2KJHYKPAXCK","target":"record","payload":{"canonical_record":{"source":{"id":"1904.09084","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-04-19T05:31:03Z","cross_cats_sorted":["physics.geo-ph","physics.ins-det"],"title_canon_sha256":"f6becc3408303b717afdceb6cd7f7f166904c1acf97b342936f82dbf5a03b792","abstract_canon_sha256":"5c636799f4c8790cfa57aef939fafe94d516e096ba52768652ee892e0b189dfb"},"schema_version":"1.0"},"canonical_sha256":"662bc4b8814b1708b13a524f853c1712b7ccbe4838af2801d4f6efa67320b8a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:02:58.234229Z","signature_b64":"oWYOBEavBW+H6leyYvZX55JrXbRn2RkiwormG4jNv2PIkQSRlnHH3feb1Vyq+wh5NPxWB1Ct1QgtwKnSlojkDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"662bc4b8814b1708b13a524f853c1712b7ccbe4838af2801d4f6efa67320b8a6","last_reissued_at":"2026-07-05T00:02:58.233747Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:02:58.233747Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.09084","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CQ636OSGOt5IOb1jicSHCWjnpe+fyE5bwMGqwFGGGONw/DN4NdNF6WdihBxH63sVpnng1mZ2I7dm8ApgKep2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:19:42.414823Z"},"content_sha256":"73868872f590f81a4c2407b008a764c216780aab996e5a4d8cb92988a8dcdeac","schema_version":"1.0","event_id":"sha256:73868872f590f81a4c2407b008a764c216780aab996e5a4d8cb92988a8dcdeac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:MYV4JOEBJMLQRMJ2KJHYKPAXCK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravity surveys using a mobile atom interferometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph","physics.ins-det"],"primary_cat":"physics.atom-ph","authors_text":"Bola S. Malek, Daniel S. Scheirer, Fei Zi, Holger M\\\"uller, Timothy H. Nguyen, Xuejian Wu, Zachary Pagel","submitted_at":"2019-04-19T05:31:03Z","abstract_excerpt":"Mobile gravimetry is important in metrology, navigation, geodesy, and geophysics. Atomic gravimeters could be among the most accurate mobile gravimeters, but are currently constrained by being complex and fragile. Here, we demonstrate a mobile atomic gravimeter, measuring tidal gravity variations in the laboratory as well as surveying gravity in the field. The tidal gravity measurements achieve a sensitivity of 37 $\\mu$Gal/$\\sqrt{\\rm Hz}$ and a long-term stability of better than 2 $\\mu$Gal, revealing ocean tidal loading effects and recording several distant earthquakes. We survey gravity in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.09084","kind":"arxiv","version":4},"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/1904.09084/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":"2026-07-05T00:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kjMlpdGE5FJezytAYMxsc0Ku/9UjDyL5oEggvCqeQv1bFeP/jc3M+Gr2DZBDXBZB8TNr/eJpcdfvI6O+jWzKDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:19:42.415192Z"},"content_sha256":"204180d4e6ecb3d38a44de20b9c6df2a4d2d34e49051a7229e8bafd4088fdb87","schema_version":"1.0","event_id":"sha256:204180d4e6ecb3d38a44de20b9c6df2a4d2d34e49051a7229e8bafd4088fdb87"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/bundle.json","state_url":"https://pith.science/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/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":"2026-08-18T08:19:42Z","links":{"resolver":"https://pith.science/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK","bundle":"https://pith.science/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/bundle.json","state":"https://pith.science/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYV4JOEBJMLQRMJ2KJHYKPAXCK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MYV4JOEBJMLQRMJ2KJHYKPAXCK","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":"5c636799f4c8790cfa57aef939fafe94d516e096ba52768652ee892e0b189dfb","cross_cats_sorted":["physics.geo-ph","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-04-19T05:31:03Z","title_canon_sha256":"f6becc3408303b717afdceb6cd7f7f166904c1acf97b342936f82dbf5a03b792"},"schema_version":"1.0","source":{"id":"1904.09084","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.09084","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1904.09084v4","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.09084","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"MYV4JOEBJMLQ","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_16","alias_value":"MYV4JOEBJMLQRMJ2","created_at":"2026-07-05T00:02:58Z"},{"alias_kind":"pith_short_8","alias_value":"MYV4JOEB","created_at":"2026-07-05T00:02:58Z"}],"graph_snapshots":[{"event_id":"sha256:204180d4e6ecb3d38a44de20b9c6df2a4d2d34e49051a7229e8bafd4088fdb87","target":"graph","created_at":"2026-07-05T00:02:58Z","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/1904.09084/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Mobile gravimetry is important in metrology, navigation, geodesy, and geophysics. Atomic gravimeters could be among the most accurate mobile gravimeters, but are currently constrained by being complex and fragile. Here, we demonstrate a mobile atomic gravimeter, measuring tidal gravity variations in the laboratory as well as surveying gravity in the field. The tidal gravity measurements achieve a sensitivity of 37 $\\mu$Gal/$\\sqrt{\\rm Hz}$ and a long-term stability of better than 2 $\\mu$Gal, revealing ocean tidal loading effects and recording several distant earthquakes. We survey gravity in th","authors_text":"Bola S. Malek, Daniel S. Scheirer, Fei Zi, Holger M\\\"uller, Timothy H. Nguyen, Xuejian Wu, Zachary Pagel","cross_cats":["physics.geo-ph","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-04-19T05:31:03Z","title":"Gravity surveys using a mobile atom interferometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.09084","kind":"arxiv","version":4},"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":"sha256:73868872f590f81a4c2407b008a764c216780aab996e5a4d8cb92988a8dcdeac","target":"record","created_at":"2026-07-05T00:02:58Z","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":"5c636799f4c8790cfa57aef939fafe94d516e096ba52768652ee892e0b189dfb","cross_cats_sorted":["physics.geo-ph","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-04-19T05:31:03Z","title_canon_sha256":"f6becc3408303b717afdceb6cd7f7f166904c1acf97b342936f82dbf5a03b792"},"schema_version":"1.0","source":{"id":"1904.09084","kind":"arxiv","version":4}},"canonical_sha256":"662bc4b8814b1708b13a524f853c1712b7ccbe4838af2801d4f6efa67320b8a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"662bc4b8814b1708b13a524f853c1712b7ccbe4838af2801d4f6efa67320b8a6","first_computed_at":"2026-07-05T00:02:58.233747Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:02:58.233747Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oWYOBEavBW+H6leyYvZX55JrXbRn2RkiwormG4jNv2PIkQSRlnHH3feb1Vyq+wh5NPxWB1Ct1QgtwKnSlojkDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:02:58.234229Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.09084","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:73868872f590f81a4c2407b008a764c216780aab996e5a4d8cb92988a8dcdeac","sha256:204180d4e6ecb3d38a44de20b9c6df2a4d2d34e49051a7229e8bafd4088fdb87"],"state_sha256":"1c9c96a24252fbaaa6f53788c02177023edc758d027beea55ff1fc06cff5f59b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"64Cfk5FVv4EwGxJ6IVhTplC3nBuTZHCKsI/KjiWbvANLshdjd400v+gvTDMKjTUeM1IlMx+gh1hV6pmcl8GbCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T08:19:42.418570Z","bundle_sha256":"371d063bb333464dad4337f6a75026ba6e7ebe8bab1ddd1d3356ff330de09ce2"}}