New CN and CH photometric indices applied to NGC 6723 show no radial gradient between its two stellar populations and reveal a possible abundance anomaly in one AGB group.
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Multiple Stellar Populations of Globular Clusters from Homogeneous Ca--CN--CH Photometry. V. $cn^\prime_{\rm JWL}$ as a Surrogate $cn_{\rm JWL}$ Index and NGC 6723
New CN and CH photometric indices applied to NGC 6723 show no radial gradient between its two stellar populations and reveal a possible abundance anomaly in one AGB group.