Contributed Talk - Splinter TimeDomain

Wednesday, 15 September 2021, 16:28   (virtual TimeD)

Observing campaigns using uGMRT and Effelsberg of a repeating fast radio burst

S. Bethapudi, T. Gautam, G.H. Hilmarsson, D.Z. Li, H.H. Lin, R.A. Main, V.R. Marthi, U.L. Pen, L.G. Spitler, S.P. Tendulkar, R.S. Wharton
MPIfR; Caltech; CITA UoT; NCRA

Fast radio bursts (FRBs) are extremely bright, extra-galactic, milli-second transients observed in radio wavelengths. First discovered in 2007, FRBs have led to the new regime of transient science. FRB20180916B was discovered to be a repeating FRB with an activity period of 16.33 days and an active window lasting 1.6 days at 600 MHz. Further observations showed that the active window depends on frequency such that bursts at higher frequencies arrive earlier in phase; all of which have the same period. In this talk, we report preliminary results from our observing campaigns of this source using the upgraded Giant Metrewave Radio Telescope (uGMRT) and Effelsberg 100-m radio telescope. The uGMRT campaign was for 36 hours primarily in band-4 and few in band-5 yielding 83 bursts. The Effelsberg campaign is still ongoing in C-band (4-8GHz), but we do report detection of 2 bursts. Making use of such a diverse dataset, we plan to understand the morphology of the bursts, present statistics on the waiting times, burst energies and fluences, and also present polarimetry measurements of all the bursts to look for periodic patterns from this repeating FRB. Lastly, we will also discuss the frequency dependency of the burst windows on phase.