The Globe Orbiting Soft X-ray (GOSoX) polarimeter concept study

Herman L. Marshall; Sarah N. T. Heine; Rosemary Davidson; Alan Garner; Eric M. Gullikson; H. Moritz Günther; Christopher Leitz; Rebecca Masterson; Eric D. Miller; June S. Stenzel; William W. Zhang; Rozenn Boissay-Malaquin; Ilaria Caiazzo; Deepto Chakrabarty; Luigi G. Gallo; Ralf K. Heilmann; Jeremy Heyl; Erin Kara; Norbert S. Schulz

doi:10.1117/12.2596186

23 August 2021 The Globe Orbiting Soft X-ray (GOSoX) polarimeter concept study

Herman L. Marshall, Sarah N. T. Heine, Rosemary Davidson, Alan Garner, Eric M. Gullikson, H. Moritz Günther, Christopher Leitz, Rebecca Masterson, Eric D. Miller, June S. Stenzel, William W. Zhang, Rozenn Boissay-Malaquin, Ilaria Caiazzo, Deepto Chakrabarty, Luigi G. Gallo, Ralf K. Heilmann, Jeremy Heyl, Erin Kara, Norbert S. Schulz

Author Affiliations +

Proceedings Volume 11822, Optics for EUV, X-Ray, and Gamma-Ray Astronomy X; 118220O (2021) https://doi.org/10.1117/12.2596186
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We describe an implementation of a broad-band soft X-ray polarimeter, substantially based on previous designs. The Globe-Orbiting Soft X-ray Polarimeter (GOSoX) is a SmallSat. As in a related mission concept the PiSoX Polarimeter, the grating arrangement is designed optimally for the purpose of polarimetry matching the dispersion of a spectrometer to a laterally graded multilayer (LGML). For GOSoX, the optics are lightweight Si mirrors in a one-bounce parabolic configuration. The instrument covers the wavelength range from 31 A to 75 A (165 - 400 eV). Upon satellite rotation, the intensities of the dispersed spectra, after reflection and polarizing by the LGMLs, give the three Stokes parameters needed to determine a source's linear polarization fraction and orientation. The design can be extended to higher energies as LGMLs are developed further. We describe the potential scientific return and the proposed mission concept following the results of a JPL Team X concept study.

Conference Presentation

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Herman L. Marshall, Sarah N. T. Heine, Rosemary Davidson, Alan Garner, Eric M. Gullikson, H. Moritz Günther, Christopher Leitz, Rebecca Masterson, Eric D. Miller, June S. Stenzel, William W. Zhang, Rozenn Boissay-Malaquin, Ilaria Caiazzo, Deepto Chakrabarty, Luigi G. Gallo, Ralf K. Heilmann, Jeremy Heyl, Erin Kara, and Norbert S. Schulz "The Globe Orbiting Soft X-ray (GOSoX) polarimeter concept study", Proc. SPIE 11822, Optics for EUV, X-Ray, and Gamma-Ray Astronomy X, 118220O (23 August 2021); https://doi.org/10.1117/12.2596186

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