Bhatt, B. C.; Pandey, A. K.; Mahra, H. S.; Paliwal, D. C.
(1994)
CCD photometry observations of young open cluster NGC 1931 in UBVRI passbands have been made down to 20.5 mag. The reddening across the cluster is found to be variable. The reddening varies from E(B – V)min = 0.55 mag to ...