2008MNRAS.389..706M

We present UBVRI CCD photometry and optical spectra of the type Ia supernova SN 2003hx which appeared in the galaxy NGC 2076, obtained till ∼ 146 d after the epoch of B-band maximum. The supernova reached at maximum brightness in B band on JD 2452893±1.0 with an apparent magnitude of 14.92±0.01 mag which was estimated by making template fits to the light curves. SN 2003hx is an example of a highly reddened supernova with E(B - V) = 0.56±0.23. We estimate R_v = 1.97±0.54 which indicates the small size of dust particles as compared to their galactic counterparts. The luminosity decline rate is Δm₁₅(B) = 1.17±0.12 mag and the absolute B-band magnitude obtained from the luminosity versus decline rate relation [Phillips et al. 1999] is M^B_max= -19.20±0.18 mag. The peak bolometric luminosity indicates that ∼0.66M_☉ mass of ⁵⁶Ni was ejected by the supernova. The spectral evolution indicates the supernova to be a normal type Ia event.