2455495

Target RA (J2000): 313.691254 and deg Target Dec (J2000): -72.80463 and deg Gaia GMag: 11.806 Programme ID: CH_PR240009 PI of observing programme: Garai Title of programme: Refining parameters of grazing transiting exoplanets with CHEOPS and TESS Abstract: Grazing transiting exoplanets still constitute only a tiny fraction of the known exoplanet population. However confirming/investigating grazing transiting exoplanets is also important. In a grazing transit the second and third contact points are missing the transit profile is V-shaped similar to that of an eclipsing binary. Consequently the light-curve solution is degenerate. Fortunately there is a solution: we need very high-quality multicolour photometric observations. Following this possibility we propose to utilise the colour difference between TESS and CHEOPS in order to refine the parameters and to confirm the grazing nature of selected transiting exoplanets namely TOI-3540 b and TOI-2193 b. [truncated! Please see actual data for full text]