F25MGII-NUV-MAMA
Description
The F25MGII filter with the NUV-MAMA provides narrow-band imaging centered on the 2798 Å MgII feature.
Recommended Uses
Narrowband imaging.
Special Considerations
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  (Å) |
FWHM (Å) |
AB mag zeropoint |
Speak |
B |
R80 (arcsec) |
Flux in central pixel |
| 2801.7 |
48.0 |
19.510 |
8.22+13 |
55.9 |
0.18 |
14% |
Figure 14.44: F25MGII NUV-MAMA Integrated System Throughput and Redleak
Table 14.18: Throughput and Sensitivity for F25MGII NUV-MAMA
| l |
Sensitivity |
Throughput % |
| 2765. |
9.94E12 |
0.16 |
| 2770. |
3.09E13 |
0.49 |
| 2775. |
6.41E13 |
1.01 |
| 2780. |
6.88E13 |
1.09 |
| 2785. |
6.61E13 |
1.04 |
| 2790. |
6.59E13 |
1.04 |
| 2795. |
6.67E13 |
1.05 |
| 2800. |
7.32E13 |
1.15 |
| 2805. |
8.10E13 |
1.27 |
| 2810. |
7.98E13 |
1.25 |
| 2815. |
7.13E13 |
1.11 |
| 2820. |
6.65E13 |
1.04 |
| 2825. |
7.02E13 |
1.09 |
| 2830. |
5.44E13 |
0.84 |
| 2835. |
2.22E13 |
0.34 |
| 2840. |
7.68E12 |
0.12 |
| 2845. |
3.32E12 |
0.05 |
| 2850. |
1.74E12 |
0.03 |
Figure 14.45: Point Source S/N vs. V+AB
for the F25MGII NUV-MAMA mode.
Figure 14.46: Extended Source S/N vs. V+AB for the F25MGII NUV-MAMA mode. Top curves are for an area of 0.2 arcsec2; bottom curves are for 1 arcsec2. Average sky assumed.
Table 14.19: Radial Profile for F25MGII
| Radius |
|
Fraction of Energy Encircled |
| Pixels |
Arcsec |
Intensity |
| 1 |
0.024 |
5.302e-02 |
0.257 |
| 2 |
0.037 |
2.834e-02 |
0.391 |
| 2 |
0.049 |
1.466e-02 |
0.510 |
| 3 |
0.073 |
4.989e-03 |
0.641 |
| 4 |
0.098 |
1.739e-03 |
0.697 |
| 5 |
0.122 |
1.302e-03 |
0.738 |
| 10 |
0.245 |
2.035e-04 |
0.843 |
| 15 |
0.367 |
1.119e-04 |
0.899 |
| 20 |
0.490 |
3.763e-05 |
0.932 |
| 25 |
0.613 |
2.057e-05 |
0.949 |
| 30 |
0.735 |
1.692e-05 |
0.965 |
| 40 |
0.980 |
6.931e-06 |
0.988 |
Figure 14.47: Point Source PSF for F25MGII NUV-MAMA7."5 square (at pixel 316,658, log scaled, B-V=-0.04). Note psf ghost ~45 pixels left of peak pixel and a few 10-3 of the peak
Figure 14.48: Point Source Encircled Energy for F25MGII NUV-MAMA
Figure 14.49: Point Source Intensity vs. Radius for F25MGII NUV-MAMA
