Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

Performance and Preliminary Calibration of the Hopkins Ultraviolet Telescope on the Astro2 Mission

Summary: Performance and Preliminary Calibration of the Hopkins
Ultraviolet Telescope on the Astro­2 Mission
Jeffrey W. Kruk, Samuel T. Durrance, Gerard A. Kriss, Arthur F. Davidsen,
William P. Blair, Brian R. Espey
Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218
David S. Finley
Eureka Scientific, Berkeley, CA 94602
An improved version of the Hopkins Ultraviolet Telescope (HUT) made its
second flight on the Astro­2 mission aboard the space shuttle Endeavour from
1995 March 2--18. The longer mission duration and greatly improved pointing
stability relative to Astro­1 made possible 385 observations of 265 celestial
targets at far­ultraviolet wavelengths. Observing efficiency exceeding 60% over
14 days of science operations yielded 205 hours of on­source integration time, a
factor of 5.1 increase over Astro­1.
We describe changes to the instrument following Astro­1 and the in­flight
photometric calibration, which is based on a comparison of our observations
of the hot DA white dwarf HZ 43 with a model atmosphere whose parameters
were derived from optical observations. The peak effective area is 24:1 cm 2 at


Source: Henry, Richard C.- Department of Physics and Astronomy, Johns Hopkins University


Collections: Physics