FRB 20121102A is active again with significantly smaller DM as revealed by FAST

FAST has been monitoring FRB 20121102A for 0.5 to 1 hour daily to weekly since February of 2022, with the central beam of the FAST 19-beams L-band Array pointing to RA = 05h31m58.70s, DEC = +33d08m52.5s (Chatterjee et al. 2017; Marcote et al. 2017), taking pulsar-searching data with a 49.152 microsecond sampling and 4096 frequency channels in between 1.0 GHz and 1.5 GHz. Following non-detections until August 1st, 2022 (between UTC 2022-08- 01 03:59:00 and UTC 2022-08-01 04:29:00), FAST detected at least 300 bursts from FRB 20121102A with a peak burst rate of 200/hr and estimated fluence between 0.03 and 0.3 Jy ms from the following dates: (UTC) 16th Aug., 21st Aug., 3rd Sep., 7th Sep. and 10-17th Sep., suggesting that this repeater is likely in another active episode.