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Photometry with AIP4WIN: a Tutorial – Part 3 Flat-field preparation

26 Sep 2014, 19:26 UTC
Photometry with AIP4WIN: a Tutorial – Part 3 Flat-field preparation
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v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} By R.D. BoozerAs mentioned earlier, flat-field frames are created to remove the bad effects of any optical defects in the telescope/camera system. The two most common methods of shooting flat-field frames are 1) shooting a twilight sky and 2) using what is called a light box (a simple artificially lit box that can be constructed by the user). Both of these methods are described extensively in Berry and Burnell’s book along with instructions on how to implement them; therefore, there is no need for me to cover those details here. Instead, I will cover what the observer is to do with the flat-field frames after they are shot.Before discussion of the implementation of flat-field frames, it should be mentioned that there were several sets of supplied stellar images, with each set taken with a different optical filter. Those were V, R and I filters which are centered on 550 nm, 650 mn, and 800 nm ...

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