14.5

FUV-MAMA

Below, for each filter used with the FUV-MAMA detector, we provide the basic properties of the mode, sensitivities, throughputs and radial profiles for imaging mode. Note the FUV imaging sensitivity has been decreasing with time, with a time dependence very similar to that seen for the G140L mode (see Figure 7.14). The throughputs presented in this section represent the original 1997 values.

Users may also want to consider whether the ACS SBC detector might be better for their observing program. The SBC has a slightly larger field-of-view, a wider selection of filters, and better throughput at most wavelengths, while the STIS FUV-MAMA detector may have a lower dark current.

• “25MAMA—FUV-MAMA Clear”

• “25MAMAD1—FUV-MAMA Pseudo-Aperture”

• “F25ND3—FUV-MAMA”

• “F25ND5—FUV-MAMA”

• “F25NDQ - FUV-MAMA”

• “F25QTZ—FUV-MAMA, Longpass”

• “F25QTZD1—FUV-MAMA, Longpass Pseudo-Aperture”

• “F25SRF2—FUV-MAMA, Longpass”

• “F25SRF2D1—FUV-MAMA, Longpass Pseudo-Aperture”

• “F25LYA—FUV-MAMA, Lyman-α”