  Nuclear weak interaction rates for fp-shell nuclei in stellar matter and the
associated energy losses are calculated using a modified form of proton-neutron
quasiparticle RPA model with separable Gamow-Teller forces. 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 the first
ever extensive compilation of weak interaction rates in stellar matter
calculated over a wide temperature-density grid and over a larger mass range.
The calculated capture and decay rates take into consideration the latest
experimental energy levels and ft value compilations. We have calculated
stellar weak interaction rates for a total of 619 nuclei in the mass range A =
40 to 100. These also include many important neutron-rich nuclei which play an
important role in the evolution process of stellar collapse. This is our second
paper in a series where we will be presenting our results on an abbreviated
scale of temperature and density for the mass range A = 18 to 100. This paper
contains the stellar weak rates in the mass range 40 to 60.
