  We have used archival GMRT data to image and study 39 galaxy clusters. These
observations were made as part of the GMRT Key Project on galaxy clusters
between 2001 and 2004. The observations presented in this sample include 14
observations at 610 MHz, 29 at 325 MHz and 3 at 244 MHz covering a redshift
range of 0.02 to 0.62. Multi-frequency observations were made for 8 clusters.
We analysed the clusters using the SPAM processing software and detected the
presence of radio halo emission for the first time in the clusters RXC
J0510-0801 and RXC J2211.7-0349. We also confirmed the presence of extended
emission in 11 clusters which were known from the literature. In clusters where
halos were not detected upper limits were placed using our own semi-automated
program. We plot our detections and non-detections on the empirical
$L_X-P_{1.4}$ and $M_{500}-P_{1.4}$ relation in radio halo clusters and discuss
the results. The best fits follow a power law of the form $L_{500} \propto
P_{1.4}^{1.82}$ and $M_{500} \propto P_{1.4}^{3.001}$ which is in accordance
with the best estimates in the literature.
