Space Telescope Science Institute  F25MGII-NUV-MAMA F25CIII-NUV-MAMA

F25CN270-NUV-MAMA

Description

The F25CN270 filter with the NUV-MAMA provides medium bandwidth imaging near the 2798 Å MgII feature.

Recommended Uses

Continuum filter for MgII 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
2710.6
161.9
21.428
1.24e+14
202.3
0.17
14%

Figure 14.50: F25CN270 NUV-MAMA Integrated System Throughput and Redleak

 

Table 14.20: Throughput and Sensitivity for F25CN270 NUV-MAMA
l
Sensitivity
Throughput %
2575.
7.44E12
0.13
2600.
6.80E13
1.15
2625.
8.77E13
1.47
2650.
1.07E14
1.78
2675.
1.21E14
1.98
2700.
1.20E14
1.94
2725.
1.17E14
1.88
2750.
9.25E13
1.48
2775.
9.76E13
1.54
2800.
1.04E14
1.62
2825.
6.63E13
1.03
2850.
1.50E13
0.23
Figure 14.51: Point Source S/N vs. V+AB for the F25CN270 NUV-MAMA mode.

 
Figure 14.52: Extended Source S/N vs. V+AB 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.

 

Table 14.21: Radial Profile for F25CN270
Radius

Fraction of Energy Encircled
Pixels
Arcsec
intensity
1
0.024
5.158e-02
0.240
2
0.037
2.953e-02
0.378
2
0.049
1.608e-02
0.504
3
0.073
5.260e-03
0.643
4
0.098
2.022e-03
0.708
5
0.122
1.215e-03
0.750
10
0.245
2.048e-04
0.854
15
0.367
9.848e-05
0.908
20
0.490
4.138e-05
0.942
25
0.613
1.817e-05
0.960
30
0.735
1.440e-05
0.974
40
0.980
4.656e-06
0.994
Figure 14.53: Point Source Encircled Energy for F25CN270 NUV-MAMA

 
Figure 14.54: Point Source Intensity vs. Radius for F25CN270 NUV-MAMA

 
F25MGII-NUV-MAMA F25CIII-NUV-MAMA
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