12.         Appendix 6.  Flat-Field Exposure Recommendations

We are building up a list of flat-field exposures for each filter. This table is a beginning.

Dome Flat-Field Exposure Time Table

Filter

 

Dome Lamp Intensity

 

Exposure Time, sec

 

Plate Scale = 0.17"/pixel

 

 

 

I

 

1000

 

8

 

J

 

500

 

6

 

H

 

500

 

2

 

K'

 

500

 

1

 

Plate Scale = 0.34"/pixel

 

 

 

I

 

700

 

9

 

J

 

400

 

4

 

H

 

400

 

1

 

K'

 

200

 

11

 

Plate Scale = 0.69"/pixel

 

 

 

I

 

600

 

3

 

J

 

300

 

5

 

H

 

200

 

13

 

K'

 

100

 

7