학술논문
Simultaneous TESS and NGTS Transit Observations of WASP-166b
Document Type
Working Paper
Author
Bryant, Edward M.; Bayliss, Daniel; McCormac, James; Wheatley, Peter J.; Acton, Jack S.; Anderson, David R.; Armstrong, David J.; Bouchy, François; Belardi, Claudia; Burleigh, Matthew R.; Tilbrook, Rosie H.; Casewell, Sarah L.; Cooke, Benjamin F.; Gill, Samuel; Goad, Michael R.; Jenkins, James S.; Lendl, Monika; Pollacco, Don; Queloz, Didier; Raynard, Liam; Smith, Alexis M. S.; Vines, Jose I.; West, Richard G.; Udry, Stephane
Source
Subject
Language
Abstract
We observed a transit of WASP-166 b using nine NGTS telescopes simultaneously with TESS observations of the same transit. We achieved a photometric precision of 152 ppm per 30 minutes with the nine NGTS telescopes combined, matching the precision reached by TESS for the transit event around this bright (T=8.87) star. The individual NGTS light curve noise is found to be dominated by scintillation noise and appears free from any time-correlated noise or any correlation between telescope systems. We fit the NGTS data for $T_C$ and $R_p/R_*$. We find $T_C$ to be consistent to within 0.25$\sigma$ of the result from the TESS data, and the difference between the TESS and NGTS measured $R_p/R_*$ values is 0.9$\sigma$. This experiment shows that multi-telescope NGTS photometry can match the precision of TESS for bright stars, and will be a valuable tool in refining the radii and ephemerides for bright TESS candidates and planets. The transit timing achieved will also enable NGTS to measure significant transit timing variations in multi-planet systems.
Comment: 10 pages, 8 figures. Accepted for publication in MNRAS
Comment: 10 pages, 8 figures. Accepted for publication in MNRAS