- Wang, Yong-Hao;
- Wang, Songhu;
- Hinse, Tobias C;
- Wu, Zhen-Yu;
- Davis, Allen B;
- Hori, Yasunori;
- Yoon, Joh-Na;
- Han, Wonyong;
- Nie, Jun-Dan;
- Liu, Hui-Gen;
- Zhang, Hui;
- Zhou, Ji-Lin;
- Wittenmyer, RA;
- Peng, Xi-Yan;
- Laughlin, Gregory
© 2019. The American Astronomical Society. All rights reserved. During the past five years, 6, 7, and 26 transit observations were carried out for the HAT-P-9b, HAT-P-32b, and HAT-P-36b systems, respectively, through the Transiting Exoplanet Monitoring Project network. Combined with the published photometric data and radial-velocity measurements, our new photometry allows us to revisit the system parameters and search for additional close-in planetary companions in these hot Jupiter systems. We measure an updated R P /R ∗ = 0.1260 ±0.0011 for HAT-P-36 system in the R band, which is 4.5σ larger than the published i-band radius ratio of 0.1186 ±0.0012. We also perform a transit timing variation (TTV) analysis for each system. Because no significant TTVs were found, we place an upper mass limit on an additional planet for each system.