Photometric and Spectroscopic Observations of Exoplanet Transit Events - Planetary Exploration and Science: Recent Results and Advances - page 276

(Montes et al. 2004 ; Zhang 2011 ). Our telescope is a 2.16-m telescope at Xinglong
Station of the National Astronomical Observatories of China. A spectral resolution
of the Coude Echelle Spectrograph is about 37,000 with a spectral region of 380-
910 nm (Zhao and Li 2001 ). Our objects are bright stars (brighter than 8 mag) that
have known short-period (period <4 days) giant planet (open exoplanet catalogue).

11.3 Observations

Here we present new photometric observations of several transiting planets of HAT-
P-10b/WASP-11b (West et al. 2009 ; Bakos et al. 2009 ), HAT-P-19b (Hartman et al.
2011 ), WASP-43b (Hellier et al. 2011 ; Gillon et al. 2012 ), WASP-36b, HAT-P-
25b, and HAT-P-20b. They were carried out in 2012 with the 85-cm telescope at
the Xinglong Station of the National Astronomical Observatories of China. Our
observations were made in R band. The exposure times are about 60 s. All observed
CCD images were reduced using the Apphot sub-package of IRAF in the standard
fashion (bias subtraction, cosmic ray remove, flat-field correction using twilight sky
exposure, and aperture photometry). The light curves of several transiting planets
(HAT-P-10b/ WASP-11b, HAT-P-19b, WASP-43b, WASP-36b, HAT-P-25b, and
HAT-P-20b) are displayed in Fig. 11.3 , where Del Mag represents the differential
magnitude between the objects and comparison star. The errors of our observations
are better than 0.01 mag in R band. The published parameters of HAT-P-10b/WASP-
11b, HAT-P-19b, and WASP-43b are listed in Table 11.1 .