RZ Ophiuchi / RZ Oph
Light curves and phase diagram of the EA type eclipsing binary RZ Ophiuchi / RZ Oph.
The BRT light curve was constructed from 65 images taken with the Bradford Robotic Telescope Cluster Camera between 2014 June 28 and 2015 November 19, using the tri-colour green filter.
The COAST light curve was constructed from 67 images taken with the Open University 14 inch Schmidt-Cassegrain COAST telescope between 2017 July 5 and 2017 December 6 using the Johnson V filter.
Combining the above two sets of data generates the following light curve.
The above results were plotted as a phase diagram, with a period of 261.9277 days. (This period was the value given by the GCVS (www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=RZ+Oph), the AAVSO VSX and Kreiner as of 2018 January 25.) The top graph shows the BRT results in black and the COAST results in red, the bottom graph is the same plot but as grey-scale.
This star is under-observed, but there is little o-c activity evident to date (Kreiner).
The complex shape of the light curve might possibly be due to mass transfer via an accretion disc rather than Roche Lobe overflow, see Olson 1993.
More results from images taken with the Open University COAST telescope will be published here as and when they become available.
[Page updated 2018 January 25]