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| Paper: |
Implementation of the Advanced Camera for Surveys Calibration Pipeline |
| Volume: |
216, Astronomical Data Analysis Software and Systems IX |
| Page: |
433 |
| Authors: |
Hack, W. J.; Greenfield, P. |
| Abstract: |
The calibration pipeline for the Hubble Space Telescope's (HST's) Advanced Camera for Surveys (ACS), CALACS, was developed to efficiently process the large datasets generated by ACS. This pipeline evolved from the code for CALSTIS, the calibration pipeline for HST's Space Telescopes Imaging Spectrograph (STIS), since both instruments generate imaging data from similar detectors (CCDs and MAMAs). However, ACS can create images with up to 4096 X 4096 pixels, and like NICMOS (HST's Near-Infrared Camera), these images can be associated with other ACS images within the pipeline for cosmic-ray rejection and other processing. CALACS therefore used line-by-line I/O and new library routines to process the images with reduced memory usage, and expanded the concept of how associations are processed. The similar structure between ACS data, and STIS data, and even NICMOS data, therefore, allowed for the significant re-use of code from established pipelines to greatly reduce the effort in development and maintenance of the new software package. |
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