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| Paper: |
Automating OSIRIS Data Reduction for the Keck Observatory Archive |
| Volume: |
485, Astronomical Data Analysis Software and Systems XXIII |
| Page: |
127 |
| Authors: |
Holt, J.; Tran, H. D.; Goodrich, R.; Berriman, G. B.; Gelino, C. R.; KOA Team |
| Abstract: |
By the end of 2013, the Keck
Observatory Archive (KOA) will serve data
from all active instruments on the Keck Telescopes. OSIRIS
(OH-Suppressing Infra-Red Imaging Spectrograph), the last active
instrument to be archived in KOA, has been in use behind the
(AO) system at Keck since February 2005. It uses an array of tiny
lenslets to simultaneously produce spectra at up to 4096 locations. Due
to the complicated nature of the OSIRIS raw data, the OSIRIS team
developed a comprehensive data reduction program. This data reduction
system has an online mode for quick real-time reductions, which are used
primarily for basic data visualization and quality assessment done at
the telescope while observing. The offline version of the data reduction
system includes an expanded reduction method list, does more iterations
for a better construction of the data cubes, and is used to produce
publication-quality products. It can also use reconstruction matrices
that are developed after the observations were taken, and are more
refined. The KOA team is currently utilizing the standard offline
reduction mode to produce quick-look browse products for the raw
data. Users of the offline data reduction system generally use a
graphical user interface to manually setup the reduction
parameters. However, in order to reduce and serve the 200,000 science
files on disk, all of the reduction parameters and steps need to be
fully automated. This pipeline will also be used to automatically
produce quick-look browse products for future OSIRIS data after each
night's observations. Here we discuss the complexities of OSIRIS data,
the reduction system in place, methods for automating the system,
performance using virtualization, and progress made to date in
generating the KOA products. |
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