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The J(Ka,Kc) = 3(0,3)-2(1,2), 3(1,3)-2(0,2), and 2(2,1)-1(1,0) transitions of this species have been observed at 3 mm in both sources. The expected 1:2 intensity ratio has been found in the 3(0,3)-2(1,2) and 3(1,3)-2(0,2) lines, belonging to the para and ortho species respectively. We also observed lines of the main species, c-C3H2, the singly deuterated c-C3HD, and the species with one 13C off of "},"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":"1305.1954","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-08T20:37:33Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"8fd0b04f310d6f14a079532415a2cac2c7f6d90e1f482faadf12667466a84dae","abstract_canon_sha256":"0e564aec6643015f669646169ed2e58c6257d41fcea12c733b274c6e30b0f57c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:04.479824Z","signature_b64":"0xyO1dKqd77JSVkZFl3fDTUIdHDMJIWmvrR93moKNpWEVY6shOvqqxYOOo1E3oGlhKW7Y/KYPm4qIXKFRFB7Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"49a63fed9f401982991df83cb5ef50bd726754ef34054b67f9379d0b45e96d60","last_reissued_at":"2026-05-18T01:50:04.479308Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:04.479308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Interstellar detection of c-C3D2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"K. 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