Research led by Associate Professor Shunsuke Adachi and his team as part of the Simons Observatory (SO) international collaboration has been accepted in the prestigious astronomical journal, The Astrophysical Journal Supplement Series (ApJS).
This paper presents the initial results of the detector antenna angle calibration for the Small Aperture Telescope (SAT) located in the Atacama Desert, Chile. The study utilized a “Sparse Wire Grid” calibrator, a device that is being developed in our laboratory.
To capture the faint polarization signals of the Cosmic Microwave Background (CMB), it is essential to determine the detector angles with extreme precision. This successful demonstration of our calibration technology significantly enhances the accuracy of future observational data. This achievement marks a major step forward in the search for primordial gravitational waves, which hold the key to uncovering the mysteries of the universe’s birth.
Publication Information
- Title: The Simons Observatory: Detector Polarization Angle Calibration using Sparse Wire Grid with Initial Data Sets of the Small Aperture Telescope
- Authors: H. Nakata, S. Adachi, K. Yamada, M. Randall, et al.
- Journal: The Astrophysical Journal Supplement Series
- Links: https://arxiv.org/abs/2512.19102