论文标题
附近VHE检测的GRB 190829A/SN 2019OYW的104M GTC观察
10.4m GTC observations of the nearby VHE-detected GRB 190829A/SN 2019oyw
论文作者
论文摘要
目标。 H.E.S.S.也观察到了Fermi检测到的GRB 190829a（Z = 0.0785），被Fermi和Swift检测到了两个发射发作，被静态间隙分开了〜40 s。望远镜的高能（VHE）。我们介绍了GRB 190829a余辉和基础超新星的104m GTC观察结果，并将其与类似的GRB 180728a进行了比较，并讨论了对产生这两个GRB的潜在物理机制的影响。方法。我们提供了多波段光度数据以及使用1040万GTC望远镜进行的光谱随访观察结果。连同迅速发射的数据一起，使用了1040万GTC数据来了解发射机制和可能的祖细胞。结果。对余辉的多波段数据的详细分析要求冷却频率在早期时期的光学和X射线频段之间传递，并在后来的SN 2019oyw占主导地位。结论。 GRB 190829a和GRB 180728a的及时发射时间特性相似，但是两种脉冲在光谱域中似乎有所不同。我们发现，由Ni Decay供电的GRB 190829a相关的Supernova（SN）2019AYW为IC-BL型，并且该SN的光谱/光度法特性与SN 1998BW观察到的SN相一致，但相对早。
Aims. GRB 190829A (z = 0.0785), detected by Fermi and Swift with two emission episodes separated by a quiescent gap of ~40 s, was also observed by the H.E.S.S. telescopes at Very-High Energy (VHE). We present the 10.4m GTC observations of the afterglow of GRB 190829A and underlying supernova and compare it against a similar GRB 180728A and discuss the implications on underlying physical mechanisms producing these two GRBs. Methods. We present multi-band photometric data along with spectroscopic follow-up observations taken with the 10.4m GTC telescope. Together with the data from the prompt emission, the 10.4m GTC data are used to understand the emission mechanisms and possible progenitor. Results. A detailed analysis of multi-band data of the afterglow demands cooling frequency to pass between the optical and X-ray bands at early epochs and dominant with underlying SN 2019oyw later on. Conclusions. Prompt emission temporal properties of GRB 190829A and GRB 180728A are similar, however the two pulses seem different in the spectral domain. We found that the supernova (SN) 2019oyw associated with GRB 190829A, powered by Ni decay, is of Type Ic-BL and that the spectroscopic/photometric properties of this SN is consistent with those observed for SN 1998bw but evolved comparatively early.
