Photometric observation of HAT-P-16b in the near-UV

Дата и время публикации : 2013-10-21T02:01:38Z

Авторы публикации и институты :
Kyle A. Pearson
Jake D. Turner
Thomas A. G. Sagan

Ссылка на журнал-издание: New Astronomy (2014) pp. 102-110
Коментарии к cтатье: 9 pages, 3 figures, New Data Reduction Program and Modeling Package. arXiv admin note: text overlap with arXiv:1211.4895
Первичная категория: astro-ph.EP

Все категории : astro-ph.EP

Краткий обзор статьи: We present the first primary transit light curve of the hot Jupiter HAT-P-16b in the near-UV photometric band. We observed this object on December 29,2012 in order to update the transit ephemeris, constrain its planetary parameters and search for magnetic field interference. Vidotto et al. (2011a) postulate that the magnetic field of HAT-P-16b can be constrained if its near-UV light curve shows an early ingress compared to its optical light curve, while its egress remains unchanged. However, we did not detect an early ingress in our night of observing when using a cadence of 60 seconds and an average photometric precision of 2.26mmag. We find a near-UV planetary radius of Rp=1.274+-0.057RJup which is consistent with its near-IR radius of Rp=1.289+-0.066RJup (Buchhave et al., 2010). We developed an automated reduction pipeline and modeling package to process our data. The data reduction package synthesizes a set of IRAF scripts to calibrate images and perform aperture photometry. The modeling package utilizes the Levenberg-Marquardt minimization algorithm to find a least-squares best fit and a differential evolution Markov Chain Monte Carlo algorithm to find the best fit to the light curve. To constrain the red noise in both fitting models we use the residual permutation (rosary bead) method and time-averaging method.

Category: Physics