The encircled energy function of the IXPE determined from data of the crab pulsar

M. Kamikobayashi; S. Gunji; L. Baldini; B. D. Ramsey; E. Watanabe; M. Terashima; Y. Kan; A. Mori

doi:10.1117/12.2676614

5 October 2023 The encircled energy function of the IXPE determined from data of the crab pulsar

M. Kamikobayashi, S. Gunji, L. Baldini, B. D. Ramsey, E. Watanabe, M. Terashima, Y. Kan, A. Mori

Proceedings Volume 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI; 126791C (2023) https://doi.org/10.1117/12.2676614
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

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Abstract

The Imaging X-ray Polarimetry Explorer (IXPE) is the unprecedented satellite capable of obtaining the x-ray polarization map. To obtain the accurate polarization map for extended sources, the measurements of the Encircled Energy Function (EEF) in flight is necessary. Though it has been often carried out using point-like source, the background may affect the accurate measurements. So, we have investigated the EEF using the data of the Crab pulsar with the nebula, because the background can be accurately removed by subtracting the off-pulse component from the on-pulse component. With the method, we succeeded in obtaining the energy dependence of the EEF.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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M. Kamikobayashi, S. Gunji, L. Baldini, B. D. Ramsey, E. Watanabe, M. Terashima, Y. Kan, and A. Mori "The encircled energy function of the IXPE determined from data of the crab pulsar", Proc. SPIE 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI, 126791C (5 October 2023); https://doi.org/10.1117/12.2676614

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