Multiband Optical Photometry and Bolometric Light Curve of the Type Ia Supernova 2004S

Abstract

We present $\mathrm{BV}{\mathrm{R}}_{\mathrm{c}}{\mathrm{I}}_{\mathrm{c}}$ broad band CCD photometry of the Type Ia supernova SN 2004S, which appeared in the galaxy MCG-05-16-021, obtained during 2004 February 12 to March 22. Multiband and bolometric light curves constructed using our data as well as other available data are presented. The time of B band maximum and the peak magnitudes in different bands are obtained using the fits of light curve and colour templates. We clearly see a strong shoulder in ${\mathrm{R}}_{\mathrm{c}}$ band and a second maximum in ${\mathrm{I}}_{\mathrm{c}}$ band. SN 2004S closely resembles SN 1992al after maximum. From the peak bolometric luminosity we estimate the ejected mass of ${}^{56}\mathrm{Ni}$ to be 0.41 ${\mathrm{M}}_{\odot }$.

8 pages, 5 figures, accepted for publication in MNRAS