Cossas, K.-W. Wu(NTHU Dept. of Physics);Tetsuya Hashimoto(NTHU Institute of Astronomy);Tomotsugu Goto(NTHU Institute of Astronomy)
Fast radio bursts (FRBs) are generally unknown source that happened in both galactically and extragalatically. The typical time scale of the transient only take less than one second. Over 50 theoretical models have been proposed to try to explain the origins. However, their origins are still unclear. We attempt to constrain the FRB progenitors by searching their burst counterpart in different wavelength. In this work, we use ALMA data for FRB121102, due to its repeating characteristics and hosted by a star-forming dwarf galaxy at z=0.19273. We report the very first detection of FRB121102 at 90.5GHz and 102.5GHz during its active phase of ~160 days period. The detection may either a burst counterpart or host galaxy. These possibilities will be further discussed in our presentation.