Skip to main content

Web Publications


AAVSO: Electronic Journal of the AAVSO (eJAAVSO) AAVSO HOME > publications > ejaavso

 
             
eJAAVSO

Flat-Fielding for CCDs in AAVSO Observations, I

 

Gary P Emerson

E. E. Barnard Observatory

34226 Gap Road

Golden, CO 80403

 

Stephen J. Little

Center for Astrophysics and Space Astronomy (CASA)

CB 389, University of Colorado

Boulder, CO 80309

 

Presented at the 87th Spring Meeting of the AAVSO, June 20, 1998

 

Abstract

 

Flat-field correction for CCD chips is necessary to correct for the relative sensitivity to light of each pixel in the array as well as non-uniformities in the focal plane of the telescope + filter combination. This has been a serious issue for AAVSO CCD observers. Each observer tends to have a different method of performing flat-fielding, and even in the professional astronomical ranks there is no agreement as to how flat-fields should be obtained. We present a simple method that can be used at any time of day or night to make an accurate flat-field for CCD observing.

 

Link to ADS abstract, article and citation information

 

 
 
  search engine |  site map |  links |  contact us
 

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484