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Imaging

GMOS can perform broad band imaging (using the SDSS filter system) or narrow-band imaging using select filters. The field of view is 5.5 arcmin x 5.5 arcmin (and does not cover the entire CCD package), with two ~ 2.8 arcsec (39 pixel) gaps between the detector chips (GMOS-S original EEV CCDs, GMOS-N original EEV CCDs and upgraded e2v DD devices), as shown below. To cover the gaps it is recommended to use dither steps of at least 5 arcsec in the X-direction. The gaps on the new Hamamatsu CCDs at GMOS-S are 4.88 arcsec (61 pixels in unbinned mode). It is recommended to use dither steps of 10 arcsec in the X-direction to cover the gaps. The size of the gaps in the upgraded GMOS-N Hamamatsu detector package is expected to be similar, and will be determined when the CCDs are commissioned. See the Status and Availability webpage for more details.

 

 

GMOS imaging data

 

  • Camera Properties
  • Filters
  • Detector Array
  • Fringing
  • Flatfield features (GMOS-N)
  • Observing Strategies