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By integrating down to a 1.4 GHz flux density of $\\approx$2$ \\mu$Jy, we measure integrated, extragalactic brightness temperatures from discrete sources of $105.63\\pm10.56 $mK, $21.76\\pm3.09 \\mu$K, $8.80\\pm0.95 \\mu$K, $2.59\\pm0.27 \\mu$K, and $1.15\\pm0.10 \\mu$k at"},"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":"1805.02672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-07T18:00:41Z","cross_cats_sorted":[],"title_canon_sha256":"9faa514620453320efa4c1f6c86011291ab9ae734784c04ff24670874de25ada","abstract_canon_sha256":"3fab3853c8fa7b6e1c7602e9629b1423c7a537794b4789662758820fe35425ad"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:05.066110Z","signature_b64":"G++MyXT2oaY4Db/ZYR8Qmu1IkWEyQB74uoGbLyGeD8eswUazZnfQQJdGZ4H0uCBJeqx9oUmTjKtvWFzv5zf6AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12fb2380c6a2674c1f9fe86dc011f3f2fe90b1a281f5f9255bd6ecd41d84b4ff","last_reissued_at":"2026-05-18T00:11:05.065473Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:05.065473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Excess in the High Frequency Radio Background: Insights from Planck","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Eric J. 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