A note on the recent amplifier failure on the Mosaic II camera

Here is a schematic layout of Mosaic 2:


The CCD4, amplifier A died in 2009. Hence, nothing is read out from this part of CCD4. You have two options:
  • (1) observe in 16 channel mode, and 1/16 of your image will not be usable.
    An example image is shown here (click to enlarge):

    • In 16 channel mode the read-out time is 100 s


  • (2) observe in 8 channel mode and read out through the b amplfiers.
    The whole image will be usable as seen here:
    • In 8 channel mode the read-out time is 150 s

    Back To Mosaic II

    Page created: April 2010 by Andrea Kunder

    Staff Contacts:
    Alistair Walker: awalker@noao.edu
    Chris Smith: csmith@noao.edu
    Andrea Kunder: akunder@ctio.noao.edu
    Tim Abbott: tabbott@noao.edu