PNS MANUAL: Biases

How to take bias sequences

It is always a good idea to take a series of bias exposures, to check for readnoise. To avoid crosstalk left and right arms should be read out separately.
  1. Ensure dome is dark, shutter closed.
  2. Make sure CCDs are set up as for science exposures: check window and readout speed
  3. Issue DAS command multbias pnsl 11; multbias pnsr 11; multbias pnsHa 11 which will first take 11 PNSL biases, then 11 PNSR biases and then finally 11 PNS Ha biases.
About this Document

We need your input to keep these notes up-to-date. Please add to this document, or create new ones which can be linked from it. Send your input by email. Last updated 9-12-2007 by L.C.


Documents of this background colour are part of a set linked from the manual