Because ACS/HRC is no longer available, WFC3/UVIS is the preferred camera for the 2000 Å to 3700 Å wavelength range. The Space Telescope Imaging Spectrograph (STIS) NUV-MAMA has imaging capabilities over some of this bandpass but it has a much smaller field of view and lower sensitivity. Table 2.2
, Figure 2.1
and Figure 2.2
compare the imaging characteristics of ACS/HRC and WFC3/UVIS. WFC3/UVIS has twice the U-band throughput of ACS/HRC (Figure 2.2
), a field of view that is 35 times larger than that of ACS/HRC, and a pixel scale that is 60% coarser than that of ACS/HRC. WFC3/UVIS is insensitive below 2000 Å. Far-UV imaging on HST
is provided by the ACS/SBC and the STIS/FUV-MAMA.