pdosmall.gif (6581 bytes)

The Minor Planet Observer
Palmer Divide Observatory

2007 Shoemaker Grant Recipient

Planetary.gif (18781 bytes)


External Links
(opens new window)

Buy MPO Software

MPO Support

CALL web site

Society for Astronomical Sciences



Binzel Method - Reference Field

PRSimpReferenceField.gif (55388 bytes)

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.


This site is best viewed at 1024x768 and higher

This page was last updated on 01/19/11 05:14 -0700.
All contents copyright (c) 2005-2011, Brian D. Warner
Trademarks are the property of their respective owners