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qatar1 [2014/12/18 12:32] Gracjan Maciejewski |
qatar1 [2017/02/21 10:23] |
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| - | ===== Qatar-1 b ===== | ||
| - | === AIMS === | ||
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| - | Qatar-1 b is a typical hot Jupiter with a mass of 1.09 M_Jup and a radius of 1.16 R_Jup (Alsubai et al. 2011). The planet orbits its host star within 1.4 d on a circular orbit. The radial velocity observations throughout a transit show a signature of the Rositter-McLaughlin effect, consistent with a sky-projected obliquity close to zero (Covino et al. 2013). | ||
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| - | More recently, von Essen et al. (2013) have found indications for a possible long-term TTV signal. The periodicity of this signal is postulated to be close to 190 or 390 days with the peak-to-peak amplitude of about 2 min. New timing observations will allow us to confirm or refute the postulated TTVs, and to put tighter constraints on the mass of the possible perturber as a function of its orbital distance. | ||
| - | |||
| - | === RESULTS === | ||
| - | We have collected 18 new transit light curves: | ||
| - | {{ :fig-lcs.png |Light curves for Qatqr-1 b transits}} | ||
| - | |||
| - | The analysis of transit times shows that there is no periodic TTV signal and transit times are consistent with a linear ephemeris: | ||
| - | {{ :fig-ttres.png |Residuals from a linear ephemeris}} | ||
| - | |||
| - | === STATUS === | ||
| - | The campaign is ended. The results are being prepared for publication. | ||
| - | |||
| - | === LIGHT CURVES === | ||
| - | |||
| - | **Reliable** | ||
| - | | **No.** | **Date** | **Instrument** | **Comment** | | ||
| - | | 1 | 2011 Aug 01 | Volkssternwarte Kirchheimlast 0.6 m | | | ||
| - | | 2 | 2012 Dec 13 | Torun 0.6 m | | | ||
| - | | 3 | 2013 Sep 03 | Torun 0.6 m | | | ||
| - | | 4 | 2013 Sep 30 | Torun 0.6 m | | | ||
| - | | 5 | 2013 Nov 26 | Trebur 1.2 m | | | ||
| - | | 6 | 2013 Dec 20 | Jena 0.9 m | | | ||
| - | | 7 | 2013 Dec 20 | Trebur 1.2 m | | | ||
| - | | 8 | 2014 Mar 25 | Trebur 1.2 m | | | ||
| - | | 9 | 2014 Apr 01 | Torun 0.6 m | | | ||
| - | | 10| 2014 May 16 | OSN 1.5 m | | | ||
| - | | 11| 2014 May 25 | OSN 1.5 m | | | ||
| - | | 12| 2014 Jun 21 | OSN 1.5 m | | | ||
| - | | 13| 2014 Jul 01 | Trebur 1.2 m | | | ||
| - | | 14| 2014 Aug 21 | Torun 0.6 m | | | ||
| - | | 15| 2014 Sep 03 | Torun 0.6 m | | | ||
| - | | 16| 2014 Sep 10 | OSN 1.5 m | | | ||
| - | | 17| 2014 Sep 17 | Jena 0.9 m | | | ||
| - | | 18| 2014 Sep 17 | Torun 0.6 m | | | ||
| - | | 19| 2014 Sep 27 | Jena 0.9 m | | | ||
| - | | 20| 2014 Sep 27 | Torun 0.6 m | | | ||
| - | | 21| 2014 Oct 27 | Torun 0.6 m | | | ||
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| - | | ||
| - | === CONTACT === | ||
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| - | PI: Gracjan Maciejewski <gmac@umk.pl> | ||