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The Minor Planet Observer
and
Palmer Divide Observatory

2007 Shoemaker Grant Recipient

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External Links
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Buy MPO Software

MPO Support

CALL web site

Society for Astronomical Sciences

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Binzel Method - Reference Field

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By measuring several stars in a reference field with known magnitudes in a given filter, you can use this reduction method to find the average difference between the measured instrumental magnitude and the catalog value. In a perfect world, this value would be a constant since there should be a 1:1 magnitude correspondence, i.e., a star one magnitude fainter in the catalog should have an instrumental magnitude that is exactly one magnitude fainter. However, that requires that your system exactly match that of the standard. This is not likely and is a good reason that you should use reference and comparison stars that are similar in color to the target.

This reduction method computes the "Ref. Offset" shown in the Reductions Values for above.

 

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This page was last updated on 01/19/11 05:14 -0700.
All contents copyright (c) 2005-2011, Brian D. Warner
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