|STIS Instrument Handbook for Cycle 25|
The F28X50OIII mode is useful for narrow-band imaging of O III 5007 Å.This filter has a significant red leak longward of 1 micron. Depending on the source spectrum, the contribution from redleak may swamp the contribution from line emission.
Pivot λ (Å) Speak Bλ R80 (arcsec) Figure 14.12: Throughput for F28x50OIII.Table 14.6: F28X50OIII Sensitivity & Throughput
Figure 14.13: Point Source S/N vs. V+ABν for the F28X50OIII filter.Top curves are for low sky; bottom curves are for average sky. Curves are labeled by required exposure time (seconds).Figure 14.14: Extended Source S/N vs. V+ABν for the F28X50OIII for gain=1. Top curves are for a source area of 0.2 arcsec2; bottom curves are for 1 arcsec2. Average sky assumed. Curves are labeled by required exposure time (seconds).Table 14.7: Radial Profile for F28X50OIII
Figure 14.16: Point Source Encircled Energy for F28X50OIIIFigure 14.17: Point Source Intensity vs. Radius for F28X50OIII