WFC3 Pixel Area Maps

Details WFC3 Pixel Area Maps WFC3 Pixel Area Maps

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010wfc..rept....8k&link_type=abstract

Instrument Science Report WFC3 2010-08, 7 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wfc3

Scientific paper

We present the pixel area maps (PAMs) for the WFC3/UVIS and WFC3/IR detectors, and discuss the normalization of these images. HST processed flt images suffer from geometric distortion and therefore have pixel areas that vary on the sky. The counts (electrons) measured for a source on these images depends on the position of the source on the detector, an effect that is implicitly corrected when these images are multidrizzled into drz files. The flt images can be multiplied by the PAMs to yield correct and uniform counts for a given source irrespective of its location on the image. To ensure consistency between the count rate measured for sources in drz images and near the center of flt images, we set the normalization of the PAMs to unity at a reference pixel near the center of the UVIS mosaic and IR detector, and set the SCALE in the IDCTAB equal to the square root of the area of this reference pixel. The implications of this choice for photometric measurements are discussed.

Affiliated with

Also associated with

No associations

Rating

WFC3 Pixel Area Maps does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with WFC3 Pixel Area Maps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and WFC3 Pixel Area Maps will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1191503