F25ND3 - NUV-MAMA

Description

The F25ND3 mode with the NUV-MAMA provides broad-band imaging with an attenuation of 10-3 with respect to similar filters (e.g., 25MAMA, F25QTZ). 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 Uses

This filter is recommended for broad-band NUV imaging of objects that are too bright by a factor of 103 for the 25MAMA "clear" filter.


Pivot λ (Å)

FWHM (Å)

AB mag zero point

Speak

Bλ

R80 (arcsec)

Flux in central pixel

2360.7

1344.5

16.62

2.38e+11

942.0

0.32

8%



Figure 14.28: F25ND3 NUV-MAMA Integrated System Throughput and Redleak




Table 14.12: Throughput and Sensitivity for F25ND3 NUV-MAMA

λ

Sensitivity

% Throughput

1200.

7.12E9

2.6e-4

1300.

1.95E10

6.6e-4

1400.

3.03E10

9.5e-4

1500.

3.70E10

1.1e-3

1600.

3.70E10

1.0e-3

1700.

3.62E10

9.4e-4

1800.

4.03E10

9.8e-4

1900.

4.73E10

1.1e-3

2000.

5.95E10

1.3e-3

2100.

7.84E10

1.6e-3

2200.

1.03E11

2.1e-3

2300.

1.29E11

2.5e-3

2400.

1.53E11

2.8e-3

2500.

1.79E11

3.1e-3

2600.

2.04E11

3.4e-3

2700.

2.16E11

3.5e-3

2800.

2.20E11

3.4e-3

2900.

1.92E11

2.9e-3

3000.

1.52E11

2.2e-3

3100.

7.44E10

1.1e-3



Figure 14.29: Point Source S/N vs. AB magnitude in the V-band 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. AB magnitude in the V-band 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).