FRB 20121102A parameters of the NRT bursts

In 2019, we changed the strategy to instead conduct ToO observations on INTEGRAL and other available facilities upon positive detection triggers from the NRT. In the 2017 campaign, FRB 20121102A was not in its burst active phase periodic window. We obtain a 5{sigma} optical flux limit of 12mJy ms using the GASP and a 3{sigma} limit from OHP T120cm R-band image of R=22.2mag of any potential persistent emission not associated with radio bursts.

In the 2019 campaign, we have simultaneous INTEGRAL data with at least 11 radio bursts from the NRT and Arecibo. We obtain a 5{sigma} upper limit of 2.7x10^-7^erg/cm^2^ in the 25-400keV energy range for contemporary radio and high energy bursts, and a 5{sigma} upper limit of 3.8x10^-11^erg/cm^2^ for permanent emission in the 25-100keV energy range. In addition, we report on the regular observations from NRT between 2016-2020, which account for 120 additional radio bursts from FRB 20121102A.

We observe temporal dispersion measure (DM) variations at a level of {DELTA}DM~+2.04(4)pc/cm^3^/yr, in broad agreement with the literature. We also present an updated fit of the periodic active window, the emission bandwidth and the burst width distribution.