|STIS Instrument Handbook for Cycle 24|
The same physical aperture as the 52X0.2 but used at the position of the smaller of the two fiducials. The fiducial bar can be used for spectroscopic coronagraphic observations. The throughput for the unocculted 52X0.2 aperture is given below.
Table 13.23: 52X0.2 Throughputs
Figure 13.70: 52X0.2 Aperture Throughput as a Function of Wavelength