Yearly accomplishments for the period of 1 April 2000 through 31 March 2001

by
Christian A. Hummel

The accomplishments include:

	1:	Attended IAU symposium No. 200 in Potsdam, "The Formation
		of Binary Stars", where he was invited to participate in a 
		panel discussion on new observational techniques.
	2:	Was invited to give a talk on "Fundamental Properties of Stars"
		at the 2000 Michelson Summer School held in Berkeley.
	3:	Published a paper in the Astrophysical Journal Letters,
		"Zeta Orionis A is a Double Star"
	4: 	Published a paper in the Astronomical Journal,
		"Orbital and stellar parameters of Omicron Leonis
		 from spectroscopy and interferometry" in a multinational
		collaboration with spectroscopists Roger Griffin (UK) and
		Jean-Michel Carquillat (France), and interferometrists
		Andy Boden (Palomar Testbed Interferometer, USA), and other 
		NPOI team members. 
	5:	Was a mentor for Markus Wittkowski, a post-doc in the NPOI team
		during 2000. Submitted a paper on limb-darkening observations
		with NPOI in collaboration with M. Wittkowski.
	6:	Was invited to become member of the scientific organizing
		committee of the IAU working group on optical and IR
		interferometry.

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:	I installed in OYSTER new software for the coherent averaging
		of visibilities which improved the dispersion correction of the
		fringe delays based on the visibility phases. I showed this
		algorithm to work down to V=5.8. This work was done in
		collaboration with D. Mozurkewich and J. Benson.
	2:	I installed software in OYSTER for the solution of global
		astrometric NPOI data sets.
	3:	I installed in OYSTER basic software for the imaging of
		NPOI data.
	4:	Implemented M. Wittkowski's bias correction techniques as
		part of the standard NPOI data reduction software. Also
		implemented his code for the computation of visibilities
		from Kurucz's stellar atmospheric models in OYSTER.