A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry

@article{Ferro2013ADC,
  title={A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry},
  author={Armando Arellano Ferro and Daniel M. Bramich and R. Figuera Jaimes and Sunetra Giridhar and N. Kains and K. Kuppuswamy and U. G. J{\o}rgensen and Khalid A. Alsubai and Jan Marie Andersen and Valerio Bozza and Patrick J. Browne and Sebastiano Calchi Novati and Yassine Damerdji and Christoph Diehl and Martin Dominik and Stefan Dreizler and Andrii Elyiv and Emanuela Giannini and Kennet B. W. Harpsoe and Frederic V. Hessman and Tobias C. Hinse and M. Hundertmark and Diana Juncher and Eamonn J. Kerins and Heidi Korhonen and Christine Liebig and Luigi Mancini and M S Mathiasen and Matthew T. Penny and Markus Rabus and Sohrab Rahvar and Davide Ricci and G. Scarpetta and Jesper F. Skottfelt and Colin Snodgrass and John Southworth and Jean Surdej and Jeremy Tregloan-Reed and C. Vilela and O. Wertz},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={434},
  pages={1220-1238}
}
We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than V ∼ 19.0 mag, even in the crowded central regions of the cluster. The high photometric precision has resulted in the discovery of two new RRc stars, three eclipsing binaries, seven long-term variables and one field RRab star behind the cluster. A detailed identification chart… Expand
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