VizieR Online Data Catalog: Study of NGC 381, NGC 2360 and Berkeley 68 (Maurya+, 2020)

The observations in Johnson UBV and Cousins RI filters of three selected clusters were obtained using 1.3-m Devasthal Fast Optical Telescope (DFOT) at Devasthal, India. The telescope is equipped with a 2kx2k CCD camera having a field of view of ~18arcminx18arcmin. The gain of the CCD is 2e^-/ADU and read out noise is 6.5e^-. We made master bias by averaging numerous bias frames taken on each observing night. We took multiple twilight sky flat fields with small offset on the sky between successive flats in each filter to avoid any star in the master flat. We also observed Landolt's standard fields at different airmasses in each band to obtain a reliable estimate of the atmospheric extinction coefficients.

We used archived near-Infrared data in the J, H, and K_s magnitudes from the Two Micron All-Sky Survey (2MASS) archive (Skrutskie et al. 2006AJ....131.1163S, Cat. VII/233). We also used Gaia archive DR2 proper motions and parallaxes to identify the cluster member stars in order to determine various cluster parameters (Gaia Collaboration 2018A&A...616A...1G, Cat. I/345).

(3 data files).