|Space Telescope Science Institute|
|Cycle 23 STIS Instrument Handbook|
The F25ND3 mode with the FUV-MAMA detector provides broad band imaging with an attenuation of 10-3. The field of view is 25x25 arcsec. The R80 and central pixel flux are unmeasured but assumed to be approximately the same as produced by the F25QTZ filterRecommended for broad-band imaging of bright objects requiring 10-3 attenuation to meet FUV-MAMA bright object protection limits.
Pivot λ (Å) Speak Bλ R80 (arcsec) Figure 14.71: F25ND3 FUV-MAMA Integrated System Throughput and RedleakTable 14.28: Throughputs and Sensitivities for F25ND3 FUV-MAMA
Figure 14.72: Point Source S/N vs. V+ABν for the F25ND3 FUV-MAMA mode. Curves are labeled by required exposure time (seconds).Figure 14.73: Extended Source S/N vs. V+ABν for the F25ND3 FUV-MAMA mode. Top curves are for an area of 0.2 arcsec2; bottom curves are for 1 arcsec2. Average sky assumed. Curves are labeled by required exposure time (seconds).