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Title:
Enhanced HST Pointing and Calibration Accuracy: Generating HST Jitter Files at ST-ECF
Authors:
Dolensky, M.; Micol, A.; Pirenne, B.; Rosa, M.
Publication:
Astronomical Data Analysis Software and Systems VII, A.S.P. Conference Series, Vol. 145, 1998, R. Albrecht, R.N. Hook and H.A. Bushouse, eds.,p.304
Publication Date:
00/1998
Origin:
AUTHOR
Bibliographic Code:
1998ASPC..145..304D

Abstract

After providing on--the--fly re-calibration of HST data to archive users, ST--ECF has embarked on a new project aimed at grouping, cosmic ray cleaning and drizzling images taken by most HST instruments. To perform this task in an unattended way, very precise pointing information is required. In addition, several other spacecraft parameters contained in the engineering data stream are required as inputs to new, enhanced calibration algorithms. An example is the estimation of the particle induced background count rate in the FOS digicons using actual HST magnetometer readings to scale geomagnetical shielding models. The production of the missing jitter files combined with the extraction of additional engineering parameters will greatly enhance the homogeneity and the scientific value of the entire archive. We therefore started the generation of the missing jitter files. In this article we explain the various aspects of the task and we give an example of a project which will take advantage of the results.

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