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Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 13: Spectroscopic Reference Material > 52X2 Aperture

52X2 Aperture
Description
The last in the series of supported long slits used with the first-order gratings and prism and is a good slit for spectrophotometric observations of point sources. The small dip seen at 2000 is likely due to uncertainties in the numerical calculation, and will not affect the absolute flux calibration.
Special Consideration
Observations using this slit do not need to be preceded by a PEAKUP. Be aware of effects of OTA scatter on the line profiles when observing point sources in the wide slits (see Section 13.7). Targets not centered on the slit along the spatial direction can experience significant shifts in wavelength.
Table 13.22: 52X2 Throughputs.    
Figure 13.69: 52X2 Aperture Throughput as a Function of Wavelength

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Chapter 13: Spectroscopic Reference Material > 52X2 Aperture

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