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Wide Field and Planetary Camera 2 Instrument Handbook Update for Cycle 15

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1.4 Cycle 14 WFPC2 Calibration Plan

The overall goals of the Cycle 14 WFPC2 Calibration Programs are to monitor health and safety of the instrument and to maintain required calibration accuracies for the science modes used in Cycle 14. As noted above, starting in Cycle 14 the decontamination procedures (and attendant observations) are performed every 55-60 days due to the more limited target visibility resulting from 2-gyro mode.


Table 1.1: WFPC2 Cycle 14 Calibration Plan.
ID Proposal Title Frequency Estimated Time (orbits) Scheduling Required Products Accuracy Required
Notes
"External" "Internal"
10744 WFPC2 Decons & Associated Observations Decons every 50-60d 6 94 every 50-60d CDBS, IHB, Synphot, WWW reports 1-2% Decons, phot.monitor, internals, UV throughput, VISFLATS and UVFLATS, darks.
10748 Standard Darks weekly, exc. decon wk
264 every 7 days, exc.decon wk CDBS 1 e-/hr CDBS updates and weekly WWW hot pixel lists.
10745 Internal Monitor weekly, exc. decon wk
44 every 7 days, exc.decon wk CDBS 0.8e-/pix BIAS, INTFLATS in F555W for gain and throughput stability measurements
10749 Visible Earth Flats continuous
50 mid-to-late CDBS 0.3% F502N only (time dependence only)
10750 UV Earth Flats continuous
20 mid-to-late CDBS 0.3% F300W only
10751 Intflat & Visflat Sweeps, Filter Anomaly Check 1/cycle
80 mid-cycle TIR 0.3% Flats in all the filters used in Cycle 14, both gain settings/shutters.
10746 CTE Monitor 1/cycle 4
mid-to-late ISR 0.03 mag Continue CTE monitor. Test for chip dependence.
10747 Photometric Monitor 1/cycle 7
mid-cycle ISR, Synphot 1% GRW+70D5824 in filter/chip combos used for science in Cycle 14.

~10% reserve
2



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