ACS/HRC AOA Test: X-Astigmatism v. Time 0.012 0.011 0.010 0.009 0.008 0.007 0.006 0.005 X-Astigmatism 0.004 0.003 0.002 0.001 0.000 -0.001 -0.002 -0.003 -0.004 -0.005 -0.006 17.00 17.25 17.50 17.75 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 20.25 20.50 AOA Test (Orbit 1) AOA Test (Orbit 2) Hours (Day 2005.142)

ST-ECF Instrument Science Report WFC3-2009-17 WFC3 SMOV proposal 11552: Calibration of the G141 grism H. Kuntschner, H. Bushouse, M. KЭmmel, J. R. Walsh October 16, 2009 A BSTR A C T Based on the SMOV observations, the performance of the WFC3 near-IR grism G141 has been assessed. ... Figure 2: Image of the G141 grism exposure (iab908s4q_flt.fits). ... 12 2 ST-ECF Technical Instrument Report WFC3-2009-17 Figure 5: Linear fit for the wavelength solution of the G141 grism. ...