RZ Ophiuchi / RZ Oph
Light curves and phase diagram of the EA type eclipsing binary RZ Ophiuchi / RZ Oph.
Three sets of data have been obtained;
Photometry of 65 images obtained with the Bradford Robotic Telescope Cluster Camera between 2014 June 28 and 2015 November 19, using a tri-colour green filter.
Photometry of 67 images taken with the Open University COAST telescope between 2017 July 5 and 2017 December 6, using a V filter.
Photometry of 50 images taken with the COAST telescope between 2018 February 27 and 2019 December 7, using a V filter.
Combining the above three sets of data generates the following light curve. (Black-run1, red-run2, blue-run3.)
The catalogued period of this star was 261.9277d (GCVS, AAVSO VSX), and 261.927d (Kreiner) (accessed 2019 December 16). The following phase diagrams were plotted with the period 261.9277d. (The bottom diagram is a monochrome version of the top diagram.)
This star is not well 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.
[This page updated 2019 December 16.]