# Abstract

 LONG-TERM MULTI-BAND STUDIES OF ULTRA-FAST ROTATOR LO PEG

 S. Karmakar, Aryabhatta Research Institute of observational sciencES (ARIES), subhajeet@aries.res.in J. Pandey, Aryabhatta Research Institute of observational sciencES (ARIES), jeewan@aries.res.in

 With 25 years multi-band data, we found short-term and long-term variability in K2 type ultra-fast rotator LO Peg. The short-term variability is due to rotational modulation with a period of 0.422923$\pm$0.000005 days. During the observations $\sim$22 flares were detected in optical V-band. Energy of these flares are found to be of the order of $10^{33-34}$ erg. We generate the surface map using V band data and found that spots on the surface are changing their position continuously with a period of $\sim$6.8 years. The surface coverage of the spots varies in the range of 6 to 26 per cent, whereas the amplitude of the light curve varies in the range of 0.04 to 0.16.