Yearly accomplishments for the period of 1 April 1999 through 31 March 2000

by
Christian A. Hummel

The accomplishments include:

	1:	Gave a talk at the conference "Working on the Fringe"
		on "Imaging and Modeling of Binaries with NPOI".
		Published a 6 page contribution to the proceedings.
	2:	Reduced 25 nights of NPOI data on the spectroscopic binary
		Omicron Leonis, determined the orbital elements, obtained
		new radial velocity data from Roger Griffin (UK), obtained
		infrared data from Andy Boden (PTI), and derived
		the physical parameters of the Omicron Leonis components.
	3:	A proposal, submitted in collaboration with A. Hajian and 
		T. Forveille,to obtain radial velocities of spectroscopic 
		binaries was accepted by the Observatoire de Haute Provence. 
		Observations are scheduled for August 2000.
	4:	Reduced joint NPOI/VLBA observations of HR 5110, a radio binary.
		Showed that for a bright star (HR 5110 is too faint) the 
		dispersion corrected scan-averaged delays scatter significantly
		less than the uncorrected delays.
	5:	Provided significant help with the new APD fiber and dewar 
		installation.
		

Here I list separately what I have done to maintain and improve the NPOI
data reduction software, comprising CONSTRICTOR and OYSTER (I have listed
only larger projects):

	1:	For CONSTRICTOR, I performed a major update of the code to
		prepare it for the reduction of the 6-way beam combiner data.
	2:	For OYSTER, I wrote a version of the entire code in IDL, which
		was installed at USNO DC and FS.
	3:	I developed a new line of NPOI raw data analysis IDL scripts
		as part of OYSTER to investigate raw data interactively.
		The raw data format conversion was implemented in CONSTRICTOR.