FRB220912A

Detected by Tianlai Dish Pathfinder on 22/11/05

Fig. 1: Dedispered graph

Fig. 2: Raw waterfall graph

Title: Detection of FRB 20220912A at 750 MHz with the Tianlai Dish Pathfinder Array

Author: Zijie Yu(NAOC), Furen Deng(NAOC), Chenhui Niu(NAOC), Jixia Li(NAOC), Shijie Sun(NAOC), Weiyang Wang(PKU), Yougang Wang(NAOC), Fengquan Wu(NAOC), Xuelei Chen(NAOC)

We report the detection of a bright fast radio burst with the Tianlai Dish Pathfinder Array. We have been carrying out a follow-up observation targeting FRB 20220912A (CHIME/FRB collaboration ATel #15679) ~6h per day since Nov 01 with our 32 beam backend in the frequency range of 700-800 MHz. We pointed at the coordinates (RA 23h09m04.9s, DEC +48d42m25.4s) provided by DSA-110 (Atel #15716). The data stream is recorded with a sampling time of 196.608 micro second for 1024 frequency channels.

A bright burst was detected with a box-car S/N~34.7 for ~1.98(+-0.08) ms duration at UT 15:02:46.017, Nov 05 2022 (MJD 59888.960254824). A preliminary estimate of the burst's peak flux is 285(+-10) Jy and fluence is ~600(+-32) Jy ms which has been calibrated with Cas A on the same day. The burst has a best estimate of dispersion measure DM = 219.8(+-0.4) pc/cc.

The Tianlai Dish Pathfinder Array is a radio interferometer located in Xinjiang, China, and operated by the National Astronomical Observatory, Chinese Academy of Sciences (NAOC).(System overview paper: A Fast Transient Backend to Detect FRBs with the Tianlai Dish Pathfinder Array, Yu et al., arXiv:2210.03272)

Tianlai Collaboration

2022/11/11