BV photometry of RR Lyrae variables in the globular cluster NGC 5466

We present new BV CCD photometry, light curves, and ephemerides for 20 RR Lyrae variables and the anomalous Cepheid, V19, in the globular cluster NGC 5466. Estimates of fundamental photometric parameters are presented, including intensity- and magnitude-averaged V magnitudes and colors, pulsation periods, and pulsation amplitudes. In several cases we find periods substantially different from those previously reported. A color-magnitude diagram is given in which the regions occupied by RRab and RRc variables have little or no overlap with each other or with the nonvariable horizontal branch. The boundaries of the instability strip for NGC 5466 are determined.