|Space Telescope Science Institute|
|Cycle 23 STIS Instrument Handbook|
The 50CCD mode is very sensitive for broad-band optical imaging. For a fixed exposure time, it can detect point sources roughly 0.8 mag fainter than with WFPC2 with the F606W filter. However, the ACS WFC with the F606W or F814W will be a better choice for most users.Recommended for deep imaging where detailed color information is not needed. In most cases the ACS WFC will be a better choice.
Pivot λ (Å) Speak Bλ R80 (arcsec) Figure 14.1: Throughput for 50CCDTable 14.2: 50CCD Sensitivity & Throughput
Figure 14.2: Point Source S/N vs. V+ABν for the 50CCD filter. Top curves are for low sky; bottom curves are for average sky. Curves are labeled by required exposure time (seconds).Figure 14.3: Extended Source S/N vs. V+ABν for the 50CCD filter for gain=1. Top curves are for a source area of 0.2 arcsec2; bottom curves are for 1 arcsec2. Average sky assumed. Curves are labeled by required exposure time (seconds).Table 14.3: Radial Profile for 50CCD
Figure 14.5: Point Source Encircled Energy for 50CCDFigure 14.6: Point Source Intensity vs. Radius for 50CCD