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- W2962743102 abstract "The Galway Astronomical Stokes Polarimeter (GASP) is an ultra-high-speed, full Stokes, astronomical imaging polarimeter based upon a Division of Amplitude Polarimeter. It has been developed to resolve extremely rapid stochastic (∼ms) variations in objects such as optical pulsars, RRATs and magnetic cataclysmic variables. GASP has no moving parts or modulated components, so the complete Stokes vector can be measured from just one exposure - making it unique to astronomy. Furthermore the time required for the determination of the full Stokes vector is limited only by the time resolution of the detectors used and the incident photon fluxes. GASP utilizes a modified Fresnel rhomb, which acts as a highly achr omatic quarter wave plate and a beamsplitter (referred to as an RBS). Here we present a description of how the DOAP works, some of the optical designs for the polarimeter, and give some preliminary results. Calibration is an important, and difficult issue with all polarimeters, b ut particularly in astronomical polarimeters. We give a description of calibration technique s appropriate to this type of polarimeter, particularly the Eigenvalue Calibration Method of Compain & Drevillon" @default.
- W2962743102 created "2019-07-30" @default.
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- W2962743102 date "2009-05-28" @default.
- W2962743102 modified "2023-10-03" @default.
- W2962743102 title "GASP-Galway Astronomical Stokes Polarimeter" @default.
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- W2962743102 doi "https://doi.org/10.22323/1.078.0029" @default.
- W2962743102 hasPublicationYear "2009" @default.
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