Several proposed source models for Ultra-High Energy Cosmic Rays (UHECRs) consist of dipole distributions oriented towards major astrophysical landmarks such as the galactic center, M87, or Centaurus A. We use a comparison between real data and simulated data to show that the HiRes-I monocular data for energies above 10 eV is, in fact, consistent with an isotropic source model. We then explore methods to quantify our sensitivity to dipole source models oriented towards the Galactic Center, M87, and Centaurus A.

An engineering run with a partial detector is scheduled for Fall of 1987. The run will test the response of Phillips TDCs and nonsparse latches, the performance of SEs and SIs, and the data path from Fastbus through the ACP system to the MicroVAX II. Debugging of the GPM and FBBC is currently in progress. Software development for the GPM, ACP nodes, and MicroVAX II host is in progress and will be ready for use by the Fall run. Production data taking will start in late 1988.