Correcting Spatial Gradients

Details Correcting Spatial Gradients Correcting Spatial Gradients

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004msngr.115...37k&link_type=abstract

The Messenger (ISSN0722-6691), No.115, p. 37-39 (March 2004)

Computer Science

7

Scientific paper

We present a method to significantly reduce large-scale photometric variations seriously affecting imaging data from the Wide Field Imager (WFI). The primary source for these gradients is non-uniform illumination, which cannot be corrected by standard flatfielding techniques. Comparison of our observations with well-calibrated multi-colour photometry from the SDSS enabled us to characterize and quantify these variations and finally to model them using a second-order polynomial. Application of the model to our observations and an independent dataset consistently reduced the large-scale gradients and thus provides a generally valid and simple tool for improving WFI photometry.

Affiliated with

Also associated with

No associations

Rating

Correcting Spatial Gradients 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 Correcting Spatial Gradients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correcting Spatial Gradients will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1652902