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Incomplete light curves

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Incomplete light curves


I am new to this science. I have done the exoplanet course in April this year. I first had to complete an asteroid observing course to received my observatory code from the MPC. This the reason for starting only now with this science. 

If I use the data given in the course  WASP 12 b I get the perfect light curve when using ASTROIMAGEJ so I do understand the software program but it is when I use my own data from say WASP 15 b or HATS 28 b that I have problems. The light curve is just half or part of what it should be. That goes for all my exoplanet data. Is there something missing with in my data ?. I am doing every thing I was told during the course so it must be the data.

I use a 9.25 celestron with SBIG 8300 ccd and guiding. Exposure time  30sec and I have about 500 slices. I live in the Southern Hemi. 

I know this is not a easy answer and you probably need much more info.

At this stage any help will help me to go forward.



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