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We present densely-sampled ultraviolet/optical photometric and low-resolutionoptical spectroscopic observations of the type IIP supernova 2013ab in thenearby ($\sim$24 Mpc) galaxy NGC 5669, from 2 to 190d after explosion.Continuous photometric observations, with the cadence of typically a day to oneweek, were acquired with the 1-2m class telescopes in the LCOGT network, ARIEStelescopes in India and various other telescopes around the globe. The lightcurve and spectra suggest that the SN is a normal type IIP event with a plateauduration of $ \sim80 $ days with mid plateau absolute visual magnitude of-16.7, although with a steeper decline during the plateau (0.92 mag 100 d$^{-1} $ in $ V $ band) relative to other archetypal SNe of similar brightness.The velocity profile of SN 2013ab shows striking resemblance with those of SNe1999em and 2012aw. Following the Rabinak & Waxman (2011) prescription, theinitial temperature evolution of the SN emission allows us to estimate theprogenitor radius to be $ \sim $ 800 R$_{\odot}$, indicating that the SNoriginated from a red supergiant star. The distance to the SN host galaxy isestimated to be 24.3 Mpc from expanding photosphere method (EPM). From ourobservations, we estimate that 0.064 M$_{\odot}$ of $^{56}$Ni was synthesizedin the explosion. General relativistic, radiation hydrodynamical modeling ofthe SN infers an explosion energy of $ 0.35\times10^{51} $ erg, a progenitormass (at the time of explosion) of $ \sim9 $ M$_{\odot}$ and an initial radiusof $ \sim600 $ R$_{\odot}$.

SN 2013ab : A normal type IIP supernova in NGC 5669