GBT22B-320
Search the periodicity of the repeating FRB 20200120E in an M81 globular cluster
Abstract
Only two repeating fast radio bursts (FRBs) show an active-dormant cycle on the order of tens to hundreds of days, a mysterious aspect with potentially critical implications on the origin of active repeating FRBs.
FRB 20200120E is a repeating FRB discovered by the
Canadian Hydrogen Intensity Mapping Experiment FRB project (CHIME) and subsequently precisely localised using the European Very long baseline interferometry (VLBI) Network (EVN) to a globular cluster in the
M81 galactic system. Recently a ~12.5-day period of FRB 20200120E has been evidence with low significance. We have detected 14 bursts from FRB~20200120E in the last active episode using GBT. The significance of the 12.5-day period has improved significantly to 6.7 sigma. Here we propose another three observations for FRB~20200120E in the predicted active windows. We estimate that the 12.5-day period will be tentatively confirmed with 7-sigma if we could have one more detection.
Investigators
| Name | Institution |
|---|---|
| Ryan Lynch | Green Bank Observatory |
| Shen Wang | National Astronomical Observatories, CAS |
| Di Li | National Astronomical Observatories, CAS; Space Science Institute |
| Shi Dai | Commonwealth Scientific and Industrial Research Organisation |
| Chenhui Niu | National Astronomical Observatories, CAS |
| Pei Wang | National Astronomical Observatories, CAS |
| Mengyao Xue | National Astronomical Observatories, CAS |
| Yongkun Zhang * | National Astronomical Observatories, CAS |
| Yuan-Pei Yang | Yunnan University |
| Yi Feng | National Astronomical Observatories, CAS |
* indicates the PI