The planets around nn serpentis: still there

  title={The planets around nn serpentis: still there},
  author={Thomas R. Marsh and Steven G. Parsons and Madelon C. P. Bours and Stuart P. Littlefair and C. M. Copperwheat and Vik S. Dhillon and Elm{\'e} Breedt and Claudio Caceres and Matthias R. Schreiber},
  journal={Monthly Notices of the Royal Astronomical Society},
We present 25 new eclipse times of the white dwarf binary NN Ser taken with the high-speed camera ULTRACAM on the William Herschel Telescope and New Technology Telescope, the RISE camera on the Liverpool Telescope and HAWK-I on the Very Large Telescope to test the two-planet model proposed to explain variations in its eclipse times measured over the last 25 yr. The planetary model survives the test with flying colours, correctly predicting a progressive lag in eclipse times of 36 s that has set… 

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