WFPC2 Technical Instrument Report 00-03:

SM3a SMOV WFPC2 Photometry Check

-Schultz, Gonzaga, and Casertano

A check of the photometric throughput of the WFPC2 was performed on January 18, 2000 (program ID: 8496). The standard star GRW+70d5824 was observed with a selection of filters and the standard star was centered in each of the four CCDs. The observations were obtained ~0.6 day after the WFPC2 DECON on January 17, 2000 (program ID: 8491, visit 55). The data indicate that any changes in the photometric throughputs due to SM3a are less than 1% in most of the visible wavelength filters, and less than a few percent in the UV filters. The measured UV throughputs are consistent with the long term trends of the UV sensitivity. The response of the WFPC2 has essentially not changed.

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