Hartmann test for INGRID

Please, perform this tests in case a sudden change in image quality is seen on the INGRID array:
  1. If observing a field with few stars, point the telescope to a closeby star cluster (it is important to have stars distributed all over the array). Some options could be:

    name      RA (2000)      DEC(2000)    Equinox  
==============================================
M29off     20 23 30.0    +38 31 29.5  J2000 
M52        23 24 25.84   +61 37 39.9  J2000
M36        05 36 12      +34 08 48    J2000 
AS40       23 58 50.2    +61 10 02    J2000 
==============================================
  2. Get the instrument and telescope in focus again (use the temporary procedure described in the other sheet).

  3. Select the position ker of the pupil stop wheel (knife-edge right):
    SYS>pstop ingrid ker

  4. Tell the TO to start guiding.

  5. Take an image with a total integration time of 30-60s. Avoid saturation using a proper number of coaverages (e.g. 2.5s*15 coav).

  6. Select the position kel of the pupil stop wheel (knife-edge left):
    SYS>pstop ingrid kel

  7. Take another image of the same integration time.

  8. Change the INGRID internal focus to -540 microns and take another set of images with the ker and kel masks in the beam.

  9. Put the normal focus again (ifocus ingrid -340) and the filter configuration you need (e.g. filter ingrid ks)

  10. Send me (azurita@ing.iac.es) an e-mail with the run numbers.

  11. Many thanks!!


Last Updated: 15 Oct 2002
Almudena Zurita, azurita@ing.iac.es