|Space Telescope Science Institute|
|Cycle 23 STIS Instrument Handbook|
The F25CN270 filter with the NUV-MAMA provides medium bandwidth imaging near the 2798 Å MgII feature.There is a substantial redleak in this filter. Sources with a red underlying continuum may be difficult to observe. Users should be careful to take into account the underlying continuum in estimating whether the observation will fall within the bright object protection limits.
Pivot λ (Å) Speak Bλ R80 (arcsec) Table 14.20: F25CN270 NUV-MAMA Sensitivity & Throughput
Figure 14.51: Point Source S/N vs. V+ABν for the F25CN270 NUV-MAMA mode. Curves are labeled by required exposure time (seconds).Figure 14.52: Extended Source S/N vs. V+ABν for the F25CN270 NUV-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).Table 14.21: Radial Profile for F25CN270*
Figure 14.53: Point Source Encircled Energy for F25CN270 NUV-MAMAFigure 14.54: Point Source Intensity vs. Radius for F25CN270 NUV-MAMA