A pair production telescope for medium-energy gamma-ray polarimetry

Hunter, Stanley D.
Bloser, Peter F.
Depaola, Gerardo Osvaldo
Dion, Michael P.
DeNolfo, Georgia A.
Hanu, Andrei
Iparraguirre, Lorenzo Marcos
Legere, Jason
Longo, Francesco
McConnell, Mark L.
Nowicki, Suzanne F.
Ryan, James M.
Son, Seunghee
Stecker, Floyd W.

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Publication date

January 2014

DOI

10.1016/j.astropartphys.2014.04.002

Publisher

Elsevier BV

Language

English

Abstract

We describe the science motivation and development of a pair production telescope for medium-energy (∼5–200 MeV) gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope (AdEPT), takes advantage of the Three-Dimensional Track Imager, a low-density gaseous time projection chamber, to achieve angular resolution within a factor of two of the pair production kinematics limit (∼0.6° at 70 MeV), continuum sensitivity comparable with the Fermi-LAT front detector (<3 × 10−6 MeV cm−2 s−1 at 70 MeV), and minimum detectable polarization less than 10% for a 10 mCrab source in 106 s.submittedVersionFil: Hunter, Stanley D. National Aeronautics and Space Administration. Goddard Space Flight Center; Estados Unidos de América.Fil...