We present extra-tidal features of spatial configuration of stars around three metal-poor globular clusters (NGC 6266, NGC 6273, NGC 6681) located in the Galactic bulge. The wide-field photometric data were obtained in BVI bands with the MOSAIC II camera at CTIO 4 m Blanco telescope. The derived color-magnitude diagrams (CMDs) contain stars in a total 71´×71´area including a cluster and its surrounding field outside of the tidal radius of the cluster. Applying statistical filtering technique, we minimized the field star contaminations on the obtained cluster CMDs and extracted the cluster members. On the spatial stellar density maps around the target clusters, we found overdensity features beyond the tidal radii of the clusters. We also found that the radial density profiles of the clusters show departures from the best-fit King model for their outer regions which support the overdensity patterns.

• Mihwa Han(Department of Astronomy, Yonsei University, Seoul 03722, Korea)
• Sang-Hyun Chun(Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea)
• Samyaday Choudhury(Department of Astronomy, Yonsei University, Seoul 03722, Korea)
• Howoo Chiang(Department of Astronomy, Yonsei University, Seoul 03722, Korea)
• Sowon Lee(Department of Astronomy, Yonsei University, Seoul 03722, Korea)
• Young-Jong Sohn(Department of Astronomy, Yonsei University, Seoul 03722, Korea) Corresponding author