{"paper":{"title":"Highly reddened type Ia supernova SN 2004ab: another case of anomalous extinction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"D. K. Sahu, G. C. Anupama, N. K. Chakradhari, T.P. Prabhu","submitted_at":"2017-11-02T06:26:57Z","abstract_excerpt":"We present optical photometric and spectroscopic results of supernova SN 2004ab, a highly reddened normal type Ia supernova. The total reddening is estimated as $E(B-V)$ = 1.70 $\\pm$ 0.05 mag. The intrinsic decline rate parameter, $\\Delta m_{15}(B)_\\text{true}$ is 1.27 $\\pm$ 0.05, and $B$-band absolute magnitude at maximum $M_{B}^{\\text{max}}$ is $-$19.31 $\\pm$ 0.25 mag. The host galaxy NGC 5054 is found to exhibit anomalous extinction with very low value of $R_V$ = 1.41 $\\pm$ 0.06 in the direction of SN 2004ab. Peak bolometric luminosity is derived as $\\log L_\\text{bol}^\\text{max}$ = 43.10 $\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.00628","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}