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arXiv · 1802.09271

A Low-latency Pipeline for GRB Light Curve and Spectrum using Fermi/GBM Near Real-time Data

Yi Zhao·Binbin Zhang·Shaolin Xiong·Xi Long·Qiang Zhang·Liming Song·Jianchao Sun·Yuanhao Wang·Hancheng Li·Qingcui Bu·Minzi Feng·Zhengheng Li·Xing Wen·Bobing Wu·Laiyu Zhang·Yongjie Zhang·Shuangnan Zhang·Jianxiong Shao
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Abstract

Rapid response and short time latency are very important for Time Domain Astronomy, such as the observations of Gamma-ray Bursts (GRBs) and electromagnetic (EM) counterparts of gravitational waves (GWs). Based on the near real-time Fermi/GBM data, we developed a low-latency pipeline to automatically calculate the temporal and spectral properties of GRBs. With this pipeline, some important parameters can be obtained, such as T90 and fluence, within ~20 minutes after the GRB trigger. For ~90% GRBs, T90 and fluence are consistent with the GBM catalog results within 2 sigma errors. This pipeline has been used by the Gamma-ray Bursts Polarimeter (POLAR) and the Insight Hard X-ray Modulation Telescope (Insight-HXMT) to follow up the bursts of interest. For GRB 170817A, the first EM counterpart of GW events detected by Fermi/GBM and INTEGRAL/SPI-ACS, the pipeline gave T90 and spectral information in 21 minutes after the GBM trigger, providing important information for POLAR and Insight-HXMT observations.

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Yi Zhao, Binbin Zhang, Shaolin Xiong, Xi Long, Qiang Zhang, Liming Song, Jianchao Sun, Yuanhao Wang, Hancheng Li, Qingcui Bu, Minzi Feng, Zhengheng Li, Xing Wen, Bobing Wu, Laiyu Zhang, Yongjie Zhang, Shuangnan Zhang, Jianxiong Shao. 2018-02-26. A Low-latency Pipeline for GRB Light Curve and Spectrum using Fermi/GBM Near Real-time Data. https://doi.org/10.1088/1674-4527/18/5/57

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