We present optical and near-infrared photometry and spectroscopy of the Type Ia SN 2003cg, which exploded in the nearby galaxy NGC 3169. The observations cover a period between −8.5 and +414 d post-maximum. SN 2003cg is a normal but highly reddened Type Ia event. Its B magnitude at maximum Bmax= 15.94 ± 0.04 and Δm15(B)obs= 1.12 ± 0.04 [Δm15(B)intrinsic= 1.25 ± 0.05]. Allowing RV to become a free parameter within the Cardelli et al. extinction law, simultaneous matches to a range of colour curves of normal SNe Ia yielded E(B−V) = 1.33 ± 0.11, and RV= 1.80 ± 0.19. While the value obtained for RV is small, such values have been invoked in the past, and may imply a grain size which is small compared with the average value for the local interstellar medium.
No takes yet. Share an insight, caveat, or question.
Elias–Rosa et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: