Changes between Version 1 and Version 2 of Background_Model_Stacks

Timestamp:

Dec 8, 2010, 3:14:46 PM (15 years ago)

Author:

eugene

Comment:

--

Background_Model_Stacks

@@ -13 +13 @@
  * Detrend : 
   * We adjust pixel values to compensate for a bias sag
-
   * We subtract a dark model of the form (C_0 + C_1 * exptime + C_2 *
     exptime * dettemp + C_3 * exptime * dettemp^2). this is a function
     of (x,y).
-
   * We multiply by a flat-field response F(x,y).  This is measured
     from a flat-field screen in the dome, then modified based on
     photometric observations of stars (only for spatial frequencies <
     1/1200 pixels or so).
-
   * for y-band, we subtract a fringe frame fitted to the fringe
     pattern.
@@ -57 +54 @@
  * the dynamic portion of the terrestial signal has a wide range of
   spatial frequencies:
-
   * star glints can be roughly PSF in width
   * ghosts can range from ~10 pixels to a couple hundred pixels