skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager

Abstract

Astrophysical polarization measurements in the soft gamma-ray band are becoming more feasible as detectors with high position and energy resolution are deployed. Previous work has shown that the minimum detectable polarization (MDP) of an ideal Compton polarimeter can be improved by ∼21% when an unbinned, maximum likelihood method (MLM) is used instead of the standard approach of fitting a sinusoid to a histogram of azimuthal scattering angles. Here we outline a procedure for implementing this maximum likelihood approach for real, nonideal polarimeters. As an example, we use the recent observation of GRB 160530A with the Compton Spectrometer and Imager. We find that the MDP for this observation is reduced by 20% when the MLM is used instead of the standard method.

Authors:
; ; ; ; ; ;  [1]; ; ;  [2]; ;  [3];  [4];  [5]
  1. Space Sciences Laboratory, University of California, Berkeley (United States)
  2. Institute of Astronomy, National Tsing Hua University, Taiwan (China)
  3. IRAP Toulouse (France)
  4. Institute of Physics, Academia Sinica, Taiwan (China)
  5. Lawrence Berkeley National Laboratory (United States)
Publication Date:
OSTI Identifier:
22679731
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 848; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COMPTON SPECTROMETERS; DATA ANALYSIS; ENERGY RESOLUTION; GAMMA RADIATION; IMAGES; MAXIMUM-LIKELIHOOD FIT; POLARIMETERS; POLARIMETRY; POLARIZATION; SCATTERING; TELESCOPES

Citation Formats

Lowell, A. W., Boggs, S. E, Chiu, C. L., Kierans, C. A., Sleator, C., Tomsick, J. A., Zoglauer, A. C., Chang, H.-K., Tseng, C.-H., Yang, C.-Y., Jean, P., Ballmoos, P. von, Lin, C.-H., and Amman, M.. Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8CCD.
Lowell, A. W., Boggs, S. E, Chiu, C. L., Kierans, C. A., Sleator, C., Tomsick, J. A., Zoglauer, A. C., Chang, H.-K., Tseng, C.-H., Yang, C.-Y., Jean, P., Ballmoos, P. von, Lin, C.-H., & Amman, M.. Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager. United States. doi:10.3847/1538-4357/AA8CCD.
Lowell, A. W., Boggs, S. E, Chiu, C. L., Kierans, C. A., Sleator, C., Tomsick, J. A., Zoglauer, A. C., Chang, H.-K., Tseng, C.-H., Yang, C.-Y., Jean, P., Ballmoos, P. von, Lin, C.-H., and Amman, M.. Fri . "Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager". United States. doi:10.3847/1538-4357/AA8CCD.
@article{osti_22679731,
title = {Maximum Likelihood Compton Polarimetry with the Compton Spectrometer and Imager},
author = {Lowell, A. W. and Boggs, S. E and Chiu, C. L. and Kierans, C. A. and Sleator, C. and Tomsick, J. A. and Zoglauer, A. C. and Chang, H.-K. and Tseng, C.-H. and Yang, C.-Y. and Jean, P. and Ballmoos, P. von and Lin, C.-H. and Amman, M.},
abstractNote = {Astrophysical polarization measurements in the soft gamma-ray band are becoming more feasible as detectors with high position and energy resolution are deployed. Previous work has shown that the minimum detectable polarization (MDP) of an ideal Compton polarimeter can be improved by ∼21% when an unbinned, maximum likelihood method (MLM) is used instead of the standard approach of fitting a sinusoid to a histogram of azimuthal scattering angles. Here we outline a procedure for implementing this maximum likelihood approach for real, nonideal polarimeters. As an example, we use the recent observation of GRB 160530A with the Compton Spectrometer and Imager. We find that the MDP for this observation is reduced by 20% when the MLM is used instead of the standard method.},
doi = {10.3847/1538-4357/AA8CCD},
journal = {Astrophysical Journal},
number = 2,
volume = 848,
place = {United States},
year = {Fri Oct 20 00:00:00 EDT 2017},
month = {Fri Oct 20 00:00:00 EDT 2017}
}