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The supernovae of Type Ibc are rare and the detailed characteristics of theseexplosions have been studied only for a few events. Unlike Type II SNe, theprogenitors of Type Ibc have never been detected in pre-explosion images. So,to understand the nature of their progenitors and the characteristics of theexplosions, investigation of proximate events are necessary. Here we presentthe results of multi-wavelength observations of Type Ib SN 2007uy in the nearby($\sim$ 29.5 Mpc) galaxy NGC 2770. Analysis of the photometric observationsrevealed this explosion as an energetic event with peak absolute R bandmagnitude $-18.5\pm0.16$, which is about one mag brighter than the mean value($-17.6\pm0.6$) derived for well observed Type Ibc events. The SN is highlyextinguished, E(B-V) = 0.63$\pm$0.15 mag, mainly due to foreground materialpresent in the host galaxy. From optical light curve modeling we determine thatabout 0.3 M$_{\odot}$ radioactive $^{56}$Ni is produced and roughly 4.4M$_{\odot}$ material is ejected during this explosion with liberated energy$\sim 15\times10^{51}$ erg, indicating the event to be an energetic one.Through optical spectroscopy, we have noticed a clear aspheric evolution ofseveral line forming regions, but no dependency of asymmetry is seen on thedistribution of $^{56}$Ni inside the ejecta. The SN shock interaction with thecircumburst material is clearly noticeable in radio follow-up, presenting aSynchrotron Self Absorption (SSA) dominated light curve with a contribution ofFree Free Absorption (FFA) during the early phases. Assuming a WR star, withwind velocity $\ga 10^3 {\rm km s}^{-1}$, as a progenitor, we derive a lowerlimit to the mass loss rate inferred from the radio data as $\dot{M} \ga2.4\times10^{-5}$ M$_{\odot}$, yr$^{-1}$, which is consistent with the resultsobtained for other Type Ibc SNe bright at radio frequencies.

SN 2007uy - metamorphosis of an aspheric Type Ib explosion