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Significant blocking factors ($\\mathcal{B} \\gtrsim 0.8$, reducing the observed flux to $\\sim17\\%$ of the intrinsic emission) permit neutron star parameters consistent with the canonical values: $M = 1.59 \\pm 0.69 M_{\\o","authors_text":"Chang-Hwan Lee, Kwang Hyun Sung, Kyujin Kwak, Myungkuk Kim, Young-Min Kim","cross_cats":["astro-ph.SR"],"headline":"Significant X-ray flux blocking allows the neutron star in 4U 1746-37 to match standard mass and radius values.","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-14T02:08:14Z","title":"The compact neutron star in 4U 1746-37 revisited: Reassessing the mass and radius"},"references":{"count":114,"internal_anchors":32,"resolved_work":114,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"Antoniadis, J. et al. 2013, Science, 340, 6131","work_id":"5f4a3420-fd7d-4118-bd88-d6f093bf6485","year":2013},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"& Zwicky , F","work_id":"7a8e8670-53ee-448a-b683-be44ae2cad09","year":1934},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"2009, , 138, 50","work_id":"e8742929-3175-4e62-85a2-129e5462ec01","year":2009},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"J., & Smale , A","work_id":"7ed0061d-25d5-4467-b0b0-539c6d6a4889","year":2004},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"1971, , 170, 299","work_id":"dd3f77af-4cef-4a43-b0a4-d31364fae201","year":1971}],"snapshot_sha256":"c48880927c5110ecafebbd00fc178b3d0b71ebfe908ead91c75be974166e9562"},"source":{"id":"2605.14264","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-15T02:18:19.479243Z","id":"53ff4c22-1b6e-476c-8a86-9a2cc592e8b8","model_set":{"reader":"grok-4.3"},"one_line_summary":"Significant X-ray flux blocking in 4U 1746-37 allows the neutron star to have canonical mass and radius values of 1.59 solar masses and 13 km or 2.12 solar masses and 9.8 km.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Significant X-ray flux blocking allows the neutron star in 4U 1746-37 to match standard mass and radius values.","strongest_claim":"Significant blocking factors (B ≳ 0.8, reducing the observed flux to ∼17% of the intrinsic emission) permit neutron star parameters consistent with the canonical values: M = 1.59 ± 0.69 M⊙, R = 13.0 ± 5.45 km, or M = 2.12 ± 1.08 M⊙, R = 9.80 ± 4.13 km.","weakest_assumption":"The assumption that significant flux blocking (B ≳ 0.8) occurs and varies with photospheric radius, thereby explaining the anomalously large peak-to-touchdown flux ratio of ∼2.0."}},"verdict_id":"53ff4c22-1b6e-476c-8a86-9a2cc592e8b8"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ae28e625c8fc7ff2965dbb1c03bdf3662811d8765a1f37393e6e93fba0653294","target":"record","created_at":"2026-05-17T23:39:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"22ad526f2cadd70187bf71d4f8ad08f969fd2083350b7070b8ce725f19bcbc55","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-14T02:08:14Z","title_canon_sha256":"7bcb9d11c5184035b271d8d0574acd1fde12bbf90a538865868b955ae20f394a"},"schema_version":"1.0","source":{"id":"2605.14264","kind":"arxiv","version":1}},"canonical_sha256":"93a778d55cad8aa575560699bb45ac6212704d59a63239b6601853ca35059e5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93a778d55cad8aa575560699bb45ac6212704d59a63239b6601853ca35059e5c","first_computed_at":"2026-05-17T23:39:10.455548Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:10.455548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6ZaDVNLyt4j31ztJL80J+AXoVpUk0VqrNSTQqj2S13x3ddHOcZv89qhRd0oEG6IW8Eoyh5bAPmtufEvp0ZbpCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:10.456015Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.14264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae28e625c8fc7ff2965dbb1c03bdf3662811d8765a1f37393e6e93fba0653294","sha256:93946298dfc02b86650c4c011c9c7f27d253e639a807bd65368f6e0683456745"],"state_sha256":"da61060e5b9a08b89124e0f8f9d5354f05b5030e454919f7df1203c6fda5ce80"}