{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:HSOITJ3VJUZKRI2GYMZ3TMLH5Q","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":"891d56c360299e241bda8f997d7afb5e5adfdf3b8037baa9be437530eacb6be2","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-03T16:56:35Z","title_canon_sha256":"01620ed79df5d37ed4562ca345aceacae907d574c31a9906f4b7f8dd70a4133b"},"schema_version":"1.0","source":{"id":"0907.0675","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.0675","created_at":"2026-07-04T17:26:48Z"},{"alias_kind":"arxiv_version","alias_value":"0907.0675v1","created_at":"2026-07-04T17:26:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.0675","created_at":"2026-07-04T17:26:48Z"},{"alias_kind":"pith_short_12","alias_value":"HSOITJ3VJUZK","created_at":"2026-07-04T17:26:48Z"},{"alias_kind":"pith_short_16","alias_value":"HSOITJ3VJUZKRI2G","created_at":"2026-07-04T17:26:48Z"},{"alias_kind":"pith_short_8","alias_value":"HSOITJ3V","created_at":"2026-07-04T17:26:48Z"}],"graph_snapshots":[{"event_id":"sha256:317c1452ac167075694bf8eaae3ad4e0d0e434cef3543b3e64894145063dfeec","target":"graph","created_at":"2026-07-04T17:26:48Z","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/0907.0675/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"By correlating nuclear recoil directions with the Earth's direction of motion through the Galaxy, a directional dark matter detector can unambiguously detect Weakly Interacting Massive Particles (WIMPs), even in the presence of backgrounds. Here, we describe the Dark Matter Time-Projection Chamber (DMTPC) detector, a TPC filled with CF4 gas at low pressure (0.1 atm). Using this detector, we have measured the vector direction (head-tail) of nuclear recoils down to energies of 100 keV with an angular resolution of <15 degrees. To study our detector backgrounds, we have operated in a basement lab","authors_text":"A. Dushkin, A. Inglis, A. Kaboth, B.N. Skvorodnev, D. Dujmic, F. Golub, G. Kohse, G. Sciolla, H. Tomita, H. Wellenstein, J.B.R. Battat, J. Lopez, J. Monroe, P. Fisher, R. Lanza, R. Vanderspek, R.Yamamoto, S. Ahlen, S. Goyal, S. Henderson, T. Caldwell","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-03T16:56:35Z","title":"DMTPC: A dark matter detector with directional sensitivity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.0675","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":"sha256:22efbb600c7c5076e9fea44970bdf9397eacfff78c1eaac1afb5433588cdc426","target":"record","created_at":"2026-07-04T17:26:48Z","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":"891d56c360299e241bda8f997d7afb5e5adfdf3b8037baa9be437530eacb6be2","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-03T16:56:35Z","title_canon_sha256":"01620ed79df5d37ed4562ca345aceacae907d574c31a9906f4b7f8dd70a4133b"},"schema_version":"1.0","source":{"id":"0907.0675","kind":"arxiv","version":1}},"canonical_sha256":"3c9c89a7754d32a8a346c333b9b167ec050dc4ff18fe9a5d91778456ae49953c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c9c89a7754d32a8a346c333b9b167ec050dc4ff18fe9a5d91778456ae49953c","first_computed_at":"2026-07-04T17:26:48.592414Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:26:48.592414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YXldirK5hBcVfW7q7FEzYdNbcy6wYg6M5YDmVKbvDxE4uImrACnfPyr1u844CYRoDO3F8LFaxNwt48iqzKJLBg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:26:48.592827Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.0675","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22efbb600c7c5076e9fea44970bdf9397eacfff78c1eaac1afb5433588cdc426","sha256:317c1452ac167075694bf8eaae3ad4e0d0e434cef3543b3e64894145063dfeec"],"state_sha256":"4c4e0e165ede8201c911ffd4a9f24f4ef1590880bab6801c90c604fad6cf712f"}