Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14
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| Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14 | |||||
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CCD Clear Imaging-50CCD
Description
The
50CCDmode 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 theF606Wfilter. However, the ACS WFC with theF606Wor F814W will be a better choice for most users.Recommended Uses.
Recommended for deep imaging where detailed color information is not needed. In most cases the ACS WFC will be a better choice.
Special Considerations
Very red sources may show significant wings from detector halo (see Section 7.1.7)
Figure 14.1: Throughput for 50CCD
Table 14.2: Throughputs and Sensitivities for 50CCD
Figure 14.2: Point Source S/N vs. V+ABfor the 50CCD filter. Top curves are for low sky; bottom curves are for average sky. Curves are labeled by required exposure time (sec).
Figure 14.3: Extended Source S/N vs. V+AB
Table 14.3: Radial Profile for 50CCD
Figure 14.4: Point Source PSF for 50CCD, 7."5 square (at pixel 518,517, log scaled, B-V=-0.25).
Figure 14.5: Point Source Encircled Energy for 50CCD
Figure 14.6: Point Source Intensity vs. Radius for 50CCD
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Space Telescope Science Institute http://www.stsci.edu Voice: (410) 338-1082 help@stsci.edu |
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