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wasp14 [2015/09/01 12:18]
Gracjan Maciejewski
wasp14 [2017/02/21 10:23]
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-===== WASP-14 b ===== 
  
-=== AIMS === 
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-The star WASP-14 was found to have a transiting planetary-mass companion by Joshi et al. (2009). The planet orbits the host star with a period of 2.244 day causing transits with the depth of 11 mmag and a duration of 2.8 hours. A very interesting features of WASP-14b reported by Joshi et al. (2009) is its high orbital eccentricity (e = 0.091 +/- 0.003) for its small orbital distance of 0.036 AU. The high eccentricity of WASP-14b may indicate either a system age comparable to the tidal circularization time-scale or the presence of an additional perturbing body in the system which may significantly delay this process of circularization (Mardling 2007). We observed WASP-14b three times in April and May 2009 at the University Observatory Jena. The O-C diagram is plotted below. The data-points derivate significantly from the ephemeris given by Joshi et al. (2009). But also after updating the ephemeris some periodicity may be noticed. More high-quality observations are required to confirm and characterize the putative TTV signal. \\ 
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-{{ :​o_c_120105.gif |}}  
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-**Figure caption:** Upper panel: The O-C diagram for WASP-14b. The open symbols denote literature data from Joshi et al. (2009) while the filled ones denote results from our own observations that are given in the table below. The dashed line shows the ephemeris given by Joshi et al (2009). The best-fitting linear trend with sinusoid is shown as the continuous grey line. Bottom:The O-C diagram with removed linear trend and folded in one phase. 
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-=== RESULTS === 
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-**WASP-14 b: transit timing analysis of 19 light curves** \\ Raetz, St.; Maciejewski,​ G.; Seeliger, M.; Marka, C.; Fernández, M.; Güver, T.; Göğüş, E.; Nowak, G.; Vaňko, M.; Berndt, A.; Eisenbeiss, T.; Mugrauer, M.; Trepl, L.; Gelszinnis, J.\\ 2015, MNRAS, 451, 4139 \\ [[http://​adsabs.harvard.edu/​abs/​2015MNRAS.451.4139R]] 
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-=== STATUS === 
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-The campaign started in February 2011. If you can contribute a light curve, please let me know. 
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-=== LIGHT CURVES === 
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-**Reliable** 
-| **No.** | **Date** | **Epoch** | **Instrument** | **Comment** | 
-| 1 | 2009 Apr 01 | 205 | Jena 0.25m |  |  
-| 2 | 2009 Apr 19 | 213 | Jena 0.25m |  |  
-| 3 | 2009 May 05 | 221 | Jena 0.25m |  |  
-| 4 | 2011 Feb 12 | 509 | Observatorio Sierra Nevada 1.5m | outlier |  
-| 5 | 2011 Mar 02 | 517 | Jena 0.25m | part of egress is missing | 
-| 6 | 2011 Mar 02 | 517 | Jena 0.6m | part of egress is missing | 
-| 7 | 2011 Mar 02 | 517 | Calar Alto 2.2m | only ingress | 
-| 8 | 2011 Mar 11 | 521 | Jena 0.6m |  | 
-| 9 | 2011 Mar 20 | 525 | Jena 0.25m |  | 
-| 10 | 2011 Mar 20 | 525 | Jena 0.6m |  | 
-| 11 | 2011 Mar 20 | 525 | Calar Alto 2.2m | bad quality | 
-| 12 | 2011 Mar 29 | 529 | Jena 0.6m |  | 
-| 13 | 2011 Mar 29 | 529 | Stara Lesna 0.5m | red noise | 
-| 14 | 2011 Apr 07 | 533 | Observatorio Sierra Nevada 1.5m |  | 
-| 15 | 2011 Apr 16 | 537 | Calar Alto 2.2m | bad quality | 
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-=== CONTACT === 
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-PI: Stefanie Raetz <​straetz@astro.uni-jena.de>​ 
 
wasp14.txt · Last modified: 2017/02/21 10:23 (external edit)
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