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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 14: ImagingReference Material > CCD Clear Imaging—50CCD

CCD Clear Imaging—50CCD
Description
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 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 7.2.8).
Pivot λ ()
Speak
Bλ
R80 (arcsec)
Figure 14.1: Throughput for 50CCD
Table 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 14.4: 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

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 14: ImagingReference Material > CCD Clear Imaging—50CCD

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