Timing problem

Posted by SCO on Jan 14, 2023; 9:19am
URL: http://astroimagej.170.s1.nabble.com/Timing-problem-tp2087.html

I am not sure what happened here. There appears to be a timing problem of some kind. The exoplanet is K2-284 b. According to the NASA Exoplanet Archive: Ingress = 12/31/2022 8:11 UT. Egress = 12/31/2022 10:15 UT. Converting this to Arizona time (Arizona does not use DST): Ingress = 12/31/2022 1:11. Egress = 12/31/2022 3:15. There is a fairly long "tail" between the start of observation and the the beginning of the transit. The "Fit and Normalize Region Selection" section automatically put 0.57236 for "Left" and 0.69182 for "Right". I do not know where it got those numbers from. This is a first try at using AstroImageJ so I am not very familiar with it. Could you please tell me how I can fix the plot (both the V markers and the data)? Thanks! Note: the text that says "December 30" is not correct. It was December 31. Two screen prints are shown below.