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This object is a typical horseshoe SNR with a diameter of 373\" x 282\" +- 4\" (90 x 68 +- 1), making it one of the largest known SNRs in the Local Group. We estimate a relatively steep radio spectral index of alpha = -0.79 +- 0.27. However, its stronger than expected polarisation of 50% +- 10% is atypical for older and more evolved SNRs. We also note a strong correlation between [Oiii] and radio images, classifying this SNR as oxygen dominant."},"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":"1109.3945","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-09-19T05:50:54Z","cross_cats_sorted":[],"title_canon_sha256":"4182778f3ae18aaa5fd948113eaafd06acad9f2cdd64b03d33158fbad1c81e70","abstract_canon_sha256":"98c7c389b3499f1b71d5336ce991b32e9be751936dad8dcec2f80acce973501c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:45.515253Z","signature_b64":"KZwRtvSQWQQzR80eMAnuTj2opic9/uqJeyoorwTkvL4bZey9dM3NtDPZf+xxEIXp6NzaEMZ044251goi2ZwVCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5721c3ea25da37e71bd3dc213e99874c89c83a77964e478cb015df68bd5450c","last_reissued_at":"2026-05-18T04:12:45.514573Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:45.514573Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Radio continuum observations of LMC SNR J0550-6823","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. 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