# A census of variability in globular cluster M 68 (NGC 4590)

@article{Kains2015ACO,
title={A census of variability in globular cluster M 68 (NGC 4590)},
author={No{\'e} Kains and Armando Arellano Ferro and R. Figuera Jaimes and D. M. Bramich and Jesper F. Skottfelt and U. G. J{\o}rgensen and Yiannis Tsapras and Rachel A. Street and Patrick J. Browne and Martin Dominik and Keith D. Horne and M. Hundertmark and Sergei I. Ipatov and Colin Snodgrass and Iain A. Steele and Khalid Alsubai and Valerio Bozza and Sebastiano Calchi Novati and Simona Ciceri and Giuseppe D’ago and Pasquale Galianni and S-H. Gu and Kennet B. W. Harpsoe and Tobias C. Hinse and Diana Juncher and Heidi Korhonen and Luigi Mancini and Andrius Popovas and Markus Rabus and Sohrab Rahvar and John Southworth and Jean Surdej and C. Vilela and X-B. Wang and O. Wertz},
journal={Astronomy and Astrophysics},
year={2015},
volume={578},
pages={128}
}
• Published 25 February 2015
• Physics
• Astronomy and Astrophysics
Aims. We analyse 20 nights of CCD observations in the V and I bands of the globular cluster M 68 (NGC 4590) and use them to detect variable objects. We also obtained electron-multiplying CCD (EMCCD) observations for this cluster in order to explore its core with unprecedented spatial resolution from the ground. Methods. We reduced our data using difference image analysis to achieve the best possible photometry in the crowded field of the cluster. In doing so, we show that when dealing with…
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