F28X50OIII - CCD

Description

The F28X502OIII mode is useful for narrow-band imaging of O III 5007 Å. The field of view is 28" × 50".

Recommended Uses

Recommended for deep high-resolution O III imaging.

Special Considerations

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)

FWHM (Å)

AB mag zero point

Speak

Bλ

R80 (arcsec)

Flux in central pixel

5005.8

6.2

18.755

1.16e+15

6.3

0.13

17%

Figure 14.12: Throughput for F28x50OIII.



Table 14.6: F28X50OIII Sensitivity & Throughput

λ

Sensitivity

% Throughput

4999.

4.81E13

0.42

5000.

1.12E14

0.99

5001.

1.92E14

1.69

5002.

3.69E14

3.24

5003.

5.93E14

5.21

5004.

8.50E14

7.46

5005.

1.12E15

9.85

5006.

1.16E15

10.13

5007.

1.03E15

9.01

5008.

8.03E14

7.04

5009.

4.98E14

4.36

5010.

2.73E14

2.39

5011.

1.29E14

1.13

5012.

4.82E13

0.42

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

Radius


 

Fraction of Energy Encircled

Pixels

Arcsec

Intensity

1

0.050

1.750e-02

0.358

1.5

0.075

9.783e-03

0.574

2

0.100

4.193e-03

0.711

3

0.150

8.194e-04

0.844

4

0.200

3.245e-04

0.884

5

0.250

2.403e-04

0.916

10

0.500

2.049e-05

0.979

15

0.750

4.391e-06

0.995

20

1.000

8.462e-07

1.000

Figure 14.15: Point Source PSF for F28X50OIII, 7."5 square (pixel 493,542, log scaled, B-V=-0.34)


Figure 14.16: Point Source Encircled Energy for F28X50OIII


Figure 14.17: Point Source Intensity vs. Radius for F28X50OIII