Bibcode
                                    
                            Hardy, L. K.; Butterley, T.; Dhillon, V. S.; Littlefair, S. P.; Wilson, R. W.
    Bibliographical reference
                                    Monthly Notices of the Royal Astronomical Society, Volume 454, Issue 4, p.4316-4325
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                        12
            
                        2015
            
  Citations
                                    27
                            Refereed citations
                                    21
                            Description
                                    pt5m is a 0.5 m robotic telescope located on the roof of the 4.2 m
William Herschel Telescope (WHT) building, at the Roque de los Muchachos
Observatory, La Palma. Using a five-position filter wheel and CCD
detector, and bespoke control software, pt5m provides a high-quality
robotic observing facility. The telescope first began robotic observing
in 2012, and is now contributing to transient follow-up and
time-resolved astronomical studies. In this paper, we present the
scientific motivation behind pt5m, as well as the specifications and
unique features of the facility. We also present an example of the
science we have performed with pt5m, where we measure the radius of the
transiting exoplanet WASP-33b. We find a planetary radius of 1.603
± 0.014RJ.