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In this paper, we calculate the likely abundances of the Ca-bearing cyanopolyynes, CaC$_{2n+1}$N for n = 1-4, drawing the conclusion that the observed abundance of CaNC must be made from much larger Ca-terminated cyanopolyyne ions, which requires considerable rearrangement in the"},"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":"2606.00631","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-05-30T09:06:59Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"1c5bf761107521bd691cd0bfb9d964c53b8f7e54402ca06dc3996773740d359f","abstract_canon_sha256":"86505ebb793bcbb3b931cefe882bd26035ac937864dbc1781d1464a736a174a1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T01:04:00.340573Z","signature_b64":"HyFVWuGStdCFgyCO9vKXD7EThnkOi8U+CuyNinvBReJj0wyxImSsOeRaH7lfSjZOig2yFgm1JwDh4mAGDTSZBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ebba9b48d960cb339a9c17ff79f7fba0bf9fc372988fbc36a2ab04c2c91dbd0","last_reissued_at":"2026-06-02T01:04:00.340068Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T01:04:00.340068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ca-bearing cyanopolyynes in IRC+10216","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"T. 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