Browsing by Author "Layden, A."
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- ItemThe globular cluster M 69: color-magnitude diagram and variable stars(2010) Escobar, M. E.; Catelan, Marcio; Zoccali, M.; Smith, H. A.; Pritzl, B. J.; Layden, A.; Gregorsok, J.; Welch, D. L.; Webb, T.We present BV photometry and the results of a search for stellar variability in the Galactic globular cluster M 69. The resulting color-magnitude diagram shows significant contamination by field stars. In our variability search we found 62 variable stars, 54 of which were new discoveries....
- ItemThe rr lyrae variables and horizontal branch of NGC 6656 (m22)(2013) Kunder, A.; Stetson, P.; Cassisi, S.; Layden, A.; Bono, G.; Catelan, Márcio; Walker, A.; Paredes Alvarez, L.; Clem, J.; Matsunaga, N.; Salaris, M.; Lee, J.; Chaboyer, B.