Instrument Science Report 00-01:

WFPC2 Cycle 9 Calibration Plan

S. Baggett, S. Gonzaga, J. Biretta, S. Casertano, I. Heyer, A. Koekemoer, M. McMaster, C. O'Dea, A. Riess, A. Schultz, B. Whitmore, M. S. Wiggs

May 22, 2000

Abstract:

This report presents the details of the WFPC2 Cycle 9 calibration plans. The proposal suite is aimed at maintaining the calibration accuracy of WFPC2 via monitoring programs, as well as continuing some previous proposals into Cycle 9 and performing several new tests. The standard monitoring programs will be continued (e.g., decontaminations, photometric and astrometric monitors, darks, biases, internal flats, and earthflats). In addition, the CTE monitor, PSF and photometric checks will be performed. Three new programs are planned as well: a red leak check, a verification of the wavelength stability of the narrowband and linear ramp filters, and a CTE calibration. The CTE calibration, in conjunction with WIYN groundbased observations (if approved), will permit a direct verification of the absolute photometric calibration of WFPC2 in observations that may be affected by CTE, providing a more robust determination of the zero point for many WFPC2 observations.

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