[ESO Web]
European Southern Observatory
New Technology Telescope
[NTT Web]

General :
Observations :
Operations :

Procedure :
Calibration of the Focus Pyramid 
Author :
 SOFI team
Release :
 12/09/99 : update 
 06/01/99 : creation

The calibration of the focus pyramid should be done during a clear night with stable seeing, every three months. The calibration is done in the large field and with the Ks filter.

  • Find an isolated star with a magnitude between 12 and 13.
  • Run the template SOFI_img_tec_FocusWedgeCalibration.obd from the directory /data/SOFI/SYSTEM/COMMON/OBS/CALIB. This template produces a file called SOFI_img_cal_FocusWedgeCalibration.dat.
  • [Top of Page]

    Send comments to: NTT Webmasters <nttweb@eso.org>
    Last Update: MMM DD, YYYY (WHO)