DS Andromedae / DS And

Light curve of the EA type eclipsing binary DS Andromedae / DS And.  Photometry from 65 unfiltered images taken with the Bradford Robotic Telescope Cluster Camera between 2013 August 6 and 2016 January 12.  The results have not been transformed.

The best fit period to these results is 1.010512 days, and the corresponding phase diagram is shown below.  
This period compares with 1.0105188d given in the AAVSO VSX and 1.0105190d from Kreiner (accessed 2016 December 16).

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I observed a primary minimum of this star with a 2" lens (The '2" Titan') on 2013 November 4.

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Combining the above minimum with the BRT results generated the following phase diagram.  (My results were arbitrarily adjusted by -0.04 mag to better fit the BRT results.)  
​Here, the best fit period is 1.010527d.

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This is a series of visual observations I made of a (primary) minimum on 24 October 24 1997 with my 10" Newtonian from Leicester.

​When combined with the other sets of data the following light curve and phase diagram results.
                                                                                    BLUE-VISUAL     BLACK-BRT     RED-2" TITAN

Given that the visual estimates were +/- 0.2 mag the fit is quite good!

​[ Page updated 2017 January 12 ]