A Production System for Radial Velocity Measurements
Douglas J. Mink and William F. Wyatt
Harvard-Smithsonian Center for Astrophysics
Abstract
A system has been developed at the Center for Astrophysics to mass-produce
and archive radial velocity measurements. One-dimensional spectra arriving
as FITS files are reduced and stored in an extensible archive format which
contains complete information about the reduction process. In order to keep
over 150,000 reduced spectra on-line for analysis, the format combines
information compactly in variable-length ASCII and binary records. Each
spectrum in the archive occupies one file which, for each instrument, has
a unique identifying number. A collection of stand-alone Fortran programs
allow examination of the archived spectra, translation to a portable format,
and co-addition of spectra, and several other functions. A library of
Fortran-callable access subroutines allows scientists to use the archive
with their own programs. IRAF tasks to import and analyze archived
spectra have been integrated with the Fortran and C programs to take
advantage of IRAF's data analysis and display capabilities.
Presented at the First Annual Conference on Astronomical Data Analysis
Software and Systems (ADASS 91) in Tucson, Arizona in November 1991
Published in Astronomical Data Analysis Software and Systems I,
ASP Conf. Ser., Vol. 25, eds. D.M. Worrall, C. Biemesderfer,
and J. Barnes, p. 439-441 (1992).
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