تقرير
Polarimetric Analysis of the Long Duration Gamma Ray Burst GRB 160530A With the Balloon Borne Compton Spectrometer and Imager
| العنوان: | Polarimetric Analysis of the Long Duration Gamma Ray Burst GRB 160530A With the Balloon Borne Compton Spectrometer and Imager |
|---|---|
| المؤلفون: | Lowell, Alexander W., Boggs, Steven E., Chiu, Jeng-Lun, Kierans, Carolyn A., Sleator, Clio C., Tomsick, John A., Zoglauer, Andreas C., Chang, Hsiang-Kuang, Tseng, Chao-Hsiung, Yang, Chien-Ying, Jean, Pierre, von Ballmoos, Peter, Lin, Chih-Hsun, Amman, Mark |
| سنة النشر: | 2017 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | A long duration gamma-ray burst, GRB 160530A, was detected by the Compton Spectrometer and Imager (COSI) during the 2016 COSI Super Pressure Balloon campaign. As a Compton telescope, COSI is inherently sensitive to the polarization of gamma-ray sources in the energy range 0.2-5.0 MeV. We measured the polarization of GRB 160530A using 1) a standard method (SM) based on fitting the distribution of azimuthal scattering angles with a modulation curve, and 2) an unbinned, maximum likelihood method (MLM). In both cases, the measured polarization level was below the $99\%$ confidence minimum detectable polarization levels of $72.3 \pm 0.8\%$ (SM) and $57.5 \pm 0.8\%$ (MLM). Therefore, COSI did not detect polarized gamma-ray emission from this burst. Our most constraining $90\%$ confidence upper limit on the polarization level was $46\%$ (MLM). Comment: For more information regarding our implementation of maximum likelihood Compton polarimetry, please see our accompanying paper "Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager" |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/aa8ccb |
| URL الوصول: | http://arxiv.org/abs/1709.05349 |
| رقم الأكسشن: | edsarx.1709.05349 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/aa8ccb |
|---|