论文标题
GRB 210619b光学余辉极化
GRB 210619B optical afterglow polarization
论文作者
论文摘要
我们报告了具有光偏光法的极亮长伽马射线爆发GRB 〜210619b的随访。我们使用Skinakas天文台的Robolopol仪器在爆发后的时间窗口中对SDSS -R频段的Grb〜210619b的光学余辉进行了光极化观测。我们报告了$ 5 \，σ$偏振的检测$ p = 1.5 \ pm0.3 $在极化角度$ evpa = 8 \ pm6^\ circ $。我们发现在观察过程中，极化可能是恒定的。这些值是由银河系的星际介质诱导的极化校正的，宿主诱导的极化可能可以忽略不计。因此，我们引用的极化是Grb余辉的固有的。
We report on the follow-up of the extremely bright long gamma-ray burst GRB~210619B with optical polarimetry. We conducted optopolarimetric observations of the optical afterglow of GRB~210619B in the SDSS-r band in the time window ~ 5967 - 8245 seconds after the burst, using the RoboPol instrument at the Skinakas observatory. We report a $5\,σ$ detection of polarization $P=1.5\pm0.3$ at polarization angle $EVPA=8\pm6^\circ$. We find that during our observations the polarization is likely constant. These values are corrected for polarization induced by the interstellar medium of the Milky Way and host-induced polarization is likely negligible. Thus the polarization we quote is intrinsic to the GRB afterglow.
