Burst properties of the highly active FRB 20201124A using uGMRT

We report the observations and the detection of 48 bursts from FRB 20201124A with the upgraded Giant Metrewave Radio Telescope at 550-750 MHz. These observations simultaneously led to the localization of FRB 20201124A to a SDSS galaxy and led to the first detection of persistent radio emission associated with the galaxy. We report the position of the brightest burst to (J2000) RA: 05h08m03.459s, Dec: +26d03'39.14" and measure a flux of 0.7+/-0.1 mJy at 650 MHz. We use DM=411 pc/cm^3 for dedispersion and find that, for the brightest burst with a fluence of 108 Jy ms, the best DM that maximizes the frequency-averaged burst substructure energy of 410.78+/-0.54 pc/cm^3. We find that the cumulative burst rate function has a shallow power law index of gamma = -1.2 +/-0.2 with a rate of 10 bursts per hour up to 10 Jy ms. We detect all bursts above 10 Jy ms, below which the missed fraction is ~30% up to 3 Jy ms. We find that the burst waiting time is largely well approximated by a Poissonian distribution. A search for short as well as longer timescale periodicities yielded no candidates. The bulk drift rates range between -0.75 and -20 MHz/ms. We report an upper limit to the scattering time of 13.6~ms and measure both a scintillation bandwidth of 0.1-0.2 MHz and a scintillation timescale of 8+/-3 min. The simultaneous localization of FRB 20201124A adds strength to the proof-of-concept method adopted from our earlier work. This could serve as a potential model for all our future localization and follow up of unlocalized repeating FRBs with the GMRT.