<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hatzidimitriou, D.</style></author><author><style face="normal" font="default" size="100%">Antoniou, V.</style></author><author><style face="normal" font="default" size="100%">Papadakis, I.</style></author><author><style face="normal" font="default" size="100%">Kaltsa, M.</style></author><author><style face="normal" font="default" size="100%">Papadaki, C.</style></author><author><style face="normal" font="default" size="100%">Papamastorakis, I.</style></author><author><style face="normal" font="default" size="100%">Croke, B. F. W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">BVRI photometry of the galactic globular cluster NGC 6779</style></title><short-title><style face="normal" font="default" size="100%">Monthly Notices of the Royal Astronomical Society</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2004/03/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://ui.adsabs.harvard.edu/abs/2004MNRAS.348.1157H</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">348</style></volume><pages><style face="normal" font="default" size="100%">1157 - 1163</style></pages><isbn><style face="normal" font="default" size="100%">0035-8711</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We present B, V, R and I photometry for NGC 6779 (M56), a metal-poor globular cluster in the galactic halo. The observations were performed using the 1.3-m telescope at Skinakas Observatory, in Crete. The reddening of the cluster was found to be E(B-V) = 0.32 ± 0.02 [E(V-I) = 0.43 ± 0.02], significantly higher than previous estimates. The metal abundance of the cluster was derived from various parametrizations of red giant branch characteristics and it was found to be [Fe/H]&lt;SUB&gt;ZW&lt;/SUB&gt;=-2.20 ± 0.12 dex on the Zinn-West metallicity scale, or [Fe/H]&lt;SUB&gt;CG&lt;/SUB&gt;=-2.00 ± 0.21 dex on the Carretta-Gratton scale. The distance modulus of the cluster is estimated to be (m-M)&lt;SUB&gt;V&lt;/SUB&gt;= 15.62 ± 0.26 (or 14.62, if we correct for the reddening to the cluster). The horizontal branch of NGC 6779 shows a clear gap at (B-V)&lt;SUB&gt;o&lt;/SUB&gt;= 0.0. Finally, the revised value for the metallicity of NGC 6779 led to a revision of its age to 13 Gyr, using the age-index calibrations of Salaris &amp;amp; Weiss.</style></abstract></record></records></xml>