HAT-P-19 b
AIMS
The K1 dwarf HAT-P-19 was found to show transits by Hartman et al. (2011). Together with RV analysis they could show that it is surrounded by a 0.292 jupiter mass planet with a radius of 1.132 jupiter radii. The RV residuals from a Keplerian fit were found to show a linear trend which indicates the existence of a third body in the system. Even though the eccentricity is quite small (e=0.067+/-0.042) compared to other TTV-targets, analysing transit timing variations can be used to prove or neglect the third-body-hypothesis from the RV signal. The predicted period of this body is 244 days, making it necessary to have long term observations.
Figure caption: The original data published by Hartman et al. (2011) showing the residuals from the fit that indicate a third body in the system (their fig. 4).
RESULTS
Data points may only lead to a redetermination of period, but no TTV measurement possible yet.
STATUS
The campaign, starting in 2011, is continuing in 2012. If you can contribute a light curve, please let me know.
LIGHT CURVES
Reliable
| No. | Date | Epoch | Instrument | Comment |
| 1 | 2011 Nov 23 | 199 | Jena 0.6m | |
| 2 | 2011 Dec 09 | 203 | Jena 0.6m | |
| 3 | 2011 Dec 17 | 205 | Calar Alto 1.2m |
Others
| No. | Date | Epoch | Instrument | Comment |
| 1 | 2011 Nov 23 | 199 | Trebur 1.2m | jumps in data points, no good fits possible |
| 2 | 2011 Dec 05 | 202 | Jena 0.6m | only first half of transit observed |
| 3 | 2011 Dec 09 | 203 | Trebur 1.2m | only first half of transit observed |
CONTACT
PI: Martin Seeliger martin.seeliger@uni-jena.de
