6.4 Image Characteristics
Figure 6.2 shows an image of a point source obtained in ground testing as seen on the NUV MAMA (i.e., fully corrected for HST's aberrations). A 2-dimensional Gaussian fit to this PSF has the following characteristics:
FWHM: 1.93 pixels = 45.5 mas
Fraction of light in brightest pixel: 14.3%.
Figure 6.2: Two-dimensional PSF for COS in imaging mode.
Figure 6.3 shows the profile through the PSF of Figure 6.2 in the x direction.
Figure 6.3: Profile through COS imaging PSF in the x direction.
This is a slice through the center of the profile.
