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Cesena (1)","submitted_at":"2016-09-01T23:14:08Z","abstract_excerpt":"We present optical UBVRI zenith night sky brightness measurements collected on eighteen nights during 2013--2016 and SQM measurements obtained daily over twenty months during 2014--2016 at the Observatorio Astronomico Nacional on the Sierra San Pedro Martir (OAN-SPM) in Mexico. The UBVRI data is based upon CCD images obtained with the 0.84m and 2.12m telescopes, while the SQM data is obtained with a high-sensitivity, low-cost photometer. The typical moonless night sky brightness at zenith averaged over the whole period is U = 22.68, B = 23.10, V = 21.84, R = 21.04, I = 19.36, and SQM = 21.88 m"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1609.00423","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-09-01T23:14:08Z","cross_cats_sorted":[],"title_canon_sha256":"5a46106d777a26994d463d6cb00b01e46bc10753f5366f56b54a7f83ca76d76a","abstract_canon_sha256":"45ecccc4fde4b55dca16122180f9cbc35181eaf84fe58ebb5663f0091dd51226"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:16.513712Z","signature_b64":"+Ooj1EseZkMlVQdOdcagKQ+PPEp4/hGCr03hwTRnwgW/FDL73A4EM8F4/ypmyaTHtnJJu6167ygk5yR2uYSyBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4224ff305ce65b25c9452888329ffeabce03078d734a350c57722dbf706309ef","last_reissued_at":"2026-05-18T00:51:16.513004Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:16.513004Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Night sky brightness at San Pedro Martir Observatory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. 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