  We present optical photometry and spectroscopy of the broad-lined Type Ic
supernova (SNIc-BL) PTF10qts, which was discovered as part of the Palomar
Transient Factory. The supernova was located in a dwarf galaxy of magnitude
$r=21.1$ at a redshift $z=0.0907$. We find that the $R$-band light curve is a
poor proxy for bolometric data and use photometric and spectroscopic data to
construct and constrain the bolometric light curve. The derived bolometric
magnitude at maximum light is $M_{\rm bol} = -18.51\pm0.2$ mag, comparable to
that of SN 1998bw ($M_{\rm bol} = -18.7$ mag) which was associated with a
gamma-ray burst (GRB). PTF10qts is one of the most luminous SNIc-BL observed
without an accompanying GRB. We estimate the physical parameters of the
explosion using data from our programme of follow-up observations, finding that
it produced a larger mass of radioactive nickel compared to other SNeIc-BL with
similar inferred ejecta masses and kinetic energies. The progenitor of the
event was likely a $\sim20$M$_{\odot}$ star.
