On the website Itelescope, there are public access telescopes in New Mexico, California, Spain, and Australia. For this study the telescope t24 in the Sierra Nevada Mountains of California was used to capture pictures on July 9 from 1:30 to 4:30 am Pacific Time. Pictures were taken on TrES-3 before and during transit. Each picture had an exposure of three minutes, and a totally of 21 pictures were taken. The first six however were taken to test the telescope and the exposure times. The first three were taken with a two minute exposure, three minute exposure, and five minute exposure. Following that three three minute exposures were taken to capture the magnitude before transit. As transit began 15 photos were taken until 15 minutes after mid-transit.
These photos were then inverted and added to VPhot (an online photometry tool) for analysis. The photos were inverted, meaning: the original photos had a black sky and white stars, the inverted photos have a white sky with black stars. This makes it easier to analyze, and to save ink. From here, each photo's magnitude and error was recorded. The comparison star 130 and the check star 139 were used for comparison to assure the magnitude of TrES-3. The data was divide into three parts: before, during, and after mid-transit. The average was taken for each part of the data. A difference of .027 was determined; the estimated difference was .0298.
These photos were then inverted and added to VPhot (an online photometry tool) for analysis. The photos were inverted, meaning: the original photos had a black sky and white stars, the inverted photos have a white sky with black stars. This makes it easier to analyze, and to save ink. From here, each photo's magnitude and error was recorded. The comparison star 130 and the check star 139 were used for comparison to assure the magnitude of TrES-3. The data was divide into three parts: before, during, and after mid-transit. The average was taken for each part of the data. A difference of .027 was determined; the estimated difference was .0298.