AZ Cassiopeiae / AZ Cas
Light curve of the EA type eclipsing binary AZ Cassiopeiae / AZ Cas, from photometry of 107 images taken with the Open University COAST telescope between 2017 July 6 and 2018 January 23. All images were taken with a V filter.
This star has a catalogued period of 3402 days (9.3 years) (AAVSO VSX, accessed 2018 April 22), and is expected to be at constant brightness during the above observations, apparent variations being due to random noise in the data and possibly meridian flip error with the telescope. At the time of writing (2018 April 22) the telescope is offline and its future accessibility to none Open University students is not clear, so this possible cause of the apparent variation might not be testable by me. The last minimum was in the winter of 2012/2013 and the next should be in 2022. Notwithstanding the above, more observations needed!
[This page updated 2018 April 22]