16583

This program will observe GD-153 comma GD-71 and GRW+70 to verify the flux calibration near the center of the field (-20 comma 0) and a few other positions using the WFC3 IR G102 and G141 grisms. These calibrations will be compared with those derived from previous programsdoublePoint 16408 (GD-153 comma GD-71 comma GRW+70) comma 15728 (GD-153) comma 15587 (GD-153) comma 14994 (GD-153) comma 14544 (GD-153) comma 14386 (GD-153) comma 14024 (GD-71) comma 13579 (GD-153) comma 13092 (GD-153) comma 12702 (GD-71) comma 12357 (GD-71) comma 11937 (GD-71) to check for any time evolution. The data will also be used to calculate wavelength solutions for the grisms and to check for time dependent sensitivity evolution of the G102 and G141 observing modes.