  Weak interaction rates and the associated energy losses for massive nuclei in
the fp-shell are calculated in stellar matter using a modified form of
proton-neutron quasiparticle RPA model with separable Gamow-Teller forces. A
total of 209 nuclei with mass numbers ranging from A = 61 to 80 are considered
here for the calculation of weak rates. These also include many neutron-rich
nuclei which play a key role in the dynamics of the core collapse calculations.
The stellar weak rates are calculated over a wide range of densities (10 < \rho
Y_{e} (gcm^{-3}) < 10^{11}) and temperatures (10^{7} < T(K) 30 x 10^{9}). This
is our third paper in a series starting with the calculation of stellar weak
rates for nuclei in the sd-shell. The calculated rates take into consideration
the latest experimental energy levels and ft value compilations. The effect of
particle emission processes is taken into account and the energies and
probabilities of these particle emission processes are also calculated in
stellar environment. Our results are presented here on an abbreviated scale of
temperature and density.
