Oral Presentation

SMA observations of GRB afterglows

Author(s): Yuji Urata (NCU), Kuiyun Huang (CYCU) et al.

Presenter: Yuji Urata (NCU)

We will present gamma-ray burst (GRB) afterglow observations with SMA. Our SMA observations successfully provided the earliest detections of submm afterglows and identified three very bright submm afterglows, which were a suitable event for the ALMA polarimetry. Based on the coordinated SMA and ALMA observations, we also successfully made the first radio polarimetry for GRB afterglow and consolidate the methodology to estimate fraction of non-energized cool electron, which require revision of total explosion energy estimation. These SMA observational approaches are also critical on short GRB as counterpart of gravitational wave transient, because estimation of explosion parameters through submm afterglow observations (as same as long GRB’ method) could provide crucial for understanding NS-NS merger. We summarized these results and future planned observations with new GRB satellite missions.