|Space Telescope Science Institute|
|Cycle 23 STIS Instrument Handbook|
The F25ND3 mode with the NUV-MAMA provides broad band imaging with an attenuation of 10-3. The field of view is 25 × 25 arcsec. The value of R80 and the central pixel flux are unmeasured but assumed to be approximately the same as produced by the F25QTZ filter.Recommended for broad-band NUV imaging of objects too bright by 103 for clear mode.
Pivot λ (Å) Speak Bλ R80 (arcsec) Figure 14.28: F25ND3 NUV-MAMA Integrated System Throughput and RedleakTable 14.12: Throughput and Sensitivity for F25ND3 NUV-MAMA
Figure 14.29: Point Source S/N vs. V+ABν for the F25ND3 NUV-MAMA mode. Top curves are for DARKTIME. Bottom curves are for average sky. Curves are labeled by required exposure time (sec.).Figure 14.30: Extended Source S/N vs. V+ABν for the F25ND3 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).