Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  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
and
David S. Finley
Eureka Scientific, Berkeley, CA 94602
ABSTRACT
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