Variable stars in the globular cluster NGC 4590 (M68)

• Time series photometric studies have been conducted to investigate variable stars.
• Periods and Blazhko effects for the known variables have been discussed.
• Nine new variable stars have been discovered, 5 of which are RRc type stars.

We present results of time series photometry to search for variable stars in the field of metal-poor globular cluster NGC 4590 (M68). Periods have been revised for 40 known variables and no significant changes were found. A considerable change in Blazhko effect for V25 has been detected. Among nine newly discovered variable candidates, 5 stars are of RRc Bailey type variables while 4 stars are unclassified. The variable stars V10, V21, V50 and V51 are found to be cluster members based on the radial velocity data taken from literature.