AAS 201st Meeting, January, 2003
Session 55. Instrumental Calibration and Data Analysis Techniques
Poster, Tuesday, January 7, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[55.07] A New Design for the FUSE Science Data Calibration Pipeline

D. J. Sahnow, W. V. Dixon, A. W. Fullerton, M. E. Kaiser, J. Dupuis (Johns Hopkins University), R. D. Robinson (CSC), P. E. Barrett, J. C. Hsu (STScI), D. Massa (SGT, Inc.)

The science data calibration pipeline for the Far Ultraviolet Spectroscopic Explorer (FUSE) was designed years before the satellite was launched in June of 1999. After launch, a number of unexpected instrumental features were discovered; as the FUSE team dealt with each of them, the pipeline was modified appropriately. Eventually, these changes made the design so cumbersome that the pipeline has become difficult to maintain.

In 2002, we began to develop a new pipeline concept that takes into account the actual instrument characteristics, and more closely corresponds to the path of the photons through the instrument. This design maintains time-tagged data as photon lists throughout the calibration process, which facilitates time-dependent corrections and allows the user to sort, filter, and combine data files interactively after running the pipeline. Histogram data will be converted to a pseudo time-tagged format and processed in an identical manner.

We expect that this new pipeline design will be implemented by the time that FUSE Cycle 4 observations begin in April 2003. We will discuss the new design and describe the progress toward this goal.

This work is supported by NASA Contract NAS5-32985 to the Johns Hopkins University.

The author(s) of this abstract have provided an email address for comments about the abstract: sahnow@pha.jhu.edu

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