During the second quarter of 1996, some 10 gigabyte of data were collected
with the NPOI on several stars of the astrometry list and on the spectroscopic
binary Zeta Ursae Majoris. The data were reduced with CONSTRICTOR and 
CHAMELEON. Work on the latter software continued, with the improvement of
data editing, display, and analysis. In collaboration with Tom Pauls (NRL),
a function to write the calibrated data in FITS format was created and used
to analyze data of the binary with AIPS. I produced maps of Zeta UMa for
seven epochs; these are only the second set of maps ever produced with data
from an optical long baseline interferometer. Separations and position angles
were determined from the maps with AIPS tasks and compared to the prediction
of the orbit derived from Mark III data. The agreement is good, but the orbital
elements need some adjustments. In collaboration with Jim Benson (USNO), Tom
Armstrong (NRL), and Dave Mozurkewich (NRL) a poster paper was prepared for the
AAS meeting in June of 1996 in Madison, Wisconsin, as well as a press release.

I incorporated minor comments of the USNO Editorial Board on my paper on the
quasar 0153+744, and submitted the paper for publication in Astronomy and
Astrophysics.

The gamma-ray source EG0431, a collaboration with Scott Lundgren (NRL), was
scheduled and observed with the VLBA.

I agreed to join Phil Bennett of the University of Colorado on a proposal to 
the NSF to fund a project to determine precise stellar masses for Zeta-Aurigae
stars by obtaining and combining spectroscopic and interferometric data.
There are about twenty candidates to be observed, most of them bright enough
for NPOI.