Previous: Instrument calibration
Up: Instrument calibration
Next: Dark frames
Previous Page: Instrument calibration
Next Page: Dark frames

Bias frames

Take a series of exposures with zero integration time. These can then be averaged to obtain adequate signal to noise.

Note that the bias level in each exposure can be estimated from the overscan region of the data frame. The location of the overscan region for various chips in use on La Palma is summarised in La Palma Technical Note 79.


Thu Apr 7 00:29:52 BST 1994