[P-AE16] Exoplanets

[PAE16-P03] Development of optical diffusers and the on-sky examination

*Taku Nishiumi^1,2, Norio Narita^3,2,7,8, Akihiko Fukui³, Noriharu Watanabe³, Kiyoe Kawauchi³, Hideyuki Izumiura⁴, Hiroyuki Maehara⁴, Nobuhiko Kusakabe^2,4, Keisuke Isogai⁵, Yuka Terada^6,9, John H Livingston³, Mayuko Mori³ (1.SOUKENDAI, 2.Astrobiology Center, 3.The University of Tokyo, 4.National Astronomical Observatory of Japan, 5.Kyoto University, 6.Academia Sinica, 7.Instituto de Astrof\'{i}sica de Canarias (IAC), 8.Japan Science and Technology Agency, 9.National Taiwan University)

Keywords:exoplanets, photometry, diffuser, observation

Over four thousands of exoplanets have been found to date. It is important to reveal the detailed physical properties of these exoplanets by various methods, including high-precision transit photometry from the ground. Some groups adopted diffusers and succeeded to observe transiting exoplanets for high-precise observation from the ground. Diffusers can enlarge light from stars and keep the shape of stars.We developed optical diffusers to observe transiting exoplanets for high precise photometry and equipped them to MuSCAT.
We examined the diffusers' capability compared with defocus and in-focus observing methods in the on-sky examination. We confirmed that the stability of diffusers are more stable than other observing methods.
We will report the details in this poster.