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Phase-resolved gamma-ray spectroscopy of the Crab pulsar observed by POLAR | | Han-Cheng Li
; Neal Gauvin
; Ming-Yu Ge
; Wojtek Hajdas
; Merlin Kole
; Zheng-Heng Li
; Nicolas Produit
; Li-Ming Song
; Jian-Chao Sun
; Jacek Szabelski
; Teresa Tymieniecka
; Yuan-HaoWang
; Bo-Bing Wu
; Xin Wu
; Shao-Lin Xiong
; Shuang-NanZhang
; Yong-Jie Zhang
; Shi-Jie Zheng
; | | Date: |
17 Oct 2019 | | Abstract: | The POLAR detector is a space based Gamma-Ray Burst (GRB) polarimeter
sensitive in the 15-500 keV energy range. Apart from its main scientific goal
as a Gamma-Ray Burst polarimeter it is also able to detect photons from pulsars
in orbit. By using the six-months in-orbit observation data, significant
pulsation from the PSR B0531+21 (Crab pulsar) was obtained. In this work, we
present the precise timing analysis of the Crab pulsar, together with a
phase-resolved spectroscopic study using a joint-fitting method adapted for
wide field of view instruments like POLAR. By using single power law fitting
over the pulsed phase, we obtained spectral indices ranging from 1.718 to
2.315, and confirmed the spectral evolution in a reverse S shape which is
homogenous with results from other missions over broadband. We will also show,
based on the POLAR in-orbit performance and Geant4 Monte-Carlo simulation, the
inferred capabilities of POLAR-2, the proposed follow-up mission of POLAR on
board the China Space Station (CSS), for pulsars studies. | | Source: | arXiv, 1910.7941 | | Services: | Forum | Review | PDF | Favorites | |
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