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Photometry with AIP4WIN: A Tutorial – Part 2 Bias and dark frames

23 Sep 2014, 16:29 UTC
Photometry with AIP4WIN:  A Tutorial – Part 2  Bias and dark frames
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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. BoozerIn this second part of the tutorial, I cover the first process that I had to perform on data supplied by the University of Tasmania; that is, the creation of a scalable master dark frame.Before the images were calibrated, an optimum bias frame, dark frame and flat-field frame needed to be generated. AIP4WIN has a utility for performing these operations called the Calibration Setup Tool. Under the Calibrate menu, the Setupoption is picked to yield the dialogue box shown below.Figure 1:The default appearance of the Calibration Setup Tool dialog box.The dialogue box’s default setting is to follow the Basiccalibration protocol in which the only calibration file produced is a master dark frame that is generated from multiple raw dark frames by either averaging the raw frames pixel by corresponding pixel or by taking the median of those pixels. This method will not bring the background noise level down sufficiently to the degree needed ...

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