{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:PDVDYKKIZNNZII5RVDCYZQRN2X","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":"133f6b734d57598bdbcc2f46aadc54a446b1fde4d62fd018299e6b0be1d7815f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-07T18:52:34Z","title_canon_sha256":"e9318a5a3707ef0203b51b37b53439a36e73abdf530d126cf39b159c9027a517"},"schema_version":"1.0","source":{"id":"1607.02120","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02120","created_at":"2026-05-18T00:57:37Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02120v1","created_at":"2026-05-18T00:57:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02120","created_at":"2026-05-18T00:57:37Z"},{"alias_kind":"pith_short_12","alias_value":"PDVDYKKIZNNZ","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PDVDYKKIZNNZII5R","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PDVDYKKI","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:d778c6995ce1eaaca74274f32a4bc046490ea8f891a75b45a0f36a0fe4d96e3b","target":"graph","created_at":"2026-05-18T00:57:37Z","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":"In recent years there have been significant improvements in the sensitivity and the angular resolution of the instruments dedicated to the observation of the Cosmic Microwave Background (CMB). ACTPol is the first polarization receiver for the Atacama Cosmology Telescope (ACT) and is observing the CMB sky with arcmin resolution over about 2000 sq. deg. Its upgrade, Advanced ACTPol (AdvACT), will observe the CMB in five frequency bands and over a larger area of the sky. We describe the optimization and implementation of the ACTPol and AdvACT surveys. The selection of the observed fields is drive","authors_text":"A. Kosowsky, A. Schillaci, A. van Engelen, B. J. Koopman, B. L. Schmitt, D. Alonso, D. N. Spergel, E. Calabrese, E. J. Wollack, E. M. Vavagiakis, F. De Bernardis, F. Nati, J. Dunkley, J. L. Sievers, J. McMahon, J. R. Bond, J. R. Stevens, K. Huffenberger, K. T. Crowley, L. A. Page, L. Newburgh, M. Devlin, M. D. Niemack, M. Hasselfield, M. Hilton, M. Salatino, M. S. Madhavacheril, N. Sehgal, P. A. Gallardo, R. Hlozek, S. K. Choi, S. M. Simon, S. Naess, S. P. Ho, S. T. Staggs, S. W. Henderson, T. Louis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-07T18:52:34Z","title":"Survey strategy optimization for the Atacama Cosmology Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02120","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":"sha256:5d329f71f85bcb71c33873900f3398e893272e1ea625c53270834a2dd0cdfc0c","target":"record","created_at":"2026-05-18T00:57:37Z","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":"133f6b734d57598bdbcc2f46aadc54a446b1fde4d62fd018299e6b0be1d7815f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-07T18:52:34Z","title_canon_sha256":"e9318a5a3707ef0203b51b37b53439a36e73abdf530d126cf39b159c9027a517"},"schema_version":"1.0","source":{"id":"1607.02120","kind":"arxiv","version":1}},"canonical_sha256":"78ea3c2948cb5b9423b1a8c58cc22dd5faa5611465b1cc4e82bdd0cfe9239180","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78ea3c2948cb5b9423b1a8c58cc22dd5faa5611465b1cc4e82bdd0cfe9239180","first_computed_at":"2026-05-18T00:57:37.720281Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:37.720281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MkUUh/+XLz9RaJD+Da6k4uvaliGCl0fRcauhsj+FWBq46cTd9RS2ezvKh00IepJENkFiCcR33hg76OGmtMwwCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:37.720730Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02120","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d329f71f85bcb71c33873900f3398e893272e1ea625c53270834a2dd0cdfc0c","sha256:d778c6995ce1eaaca74274f32a4bc046490ea8f891a75b45a0f36a0fe4d96e3b"],"state_sha256":"74a468df6404c484c686d27567de9ebd36113b9631e81efa81dea5298d09e713"}