There is only one dip in flux recorded. How can I interpret this particular light curve and find planetary radius
There is only one dip in flux recorded.
No, it seems to be a folded light curve that
may include of the order of a thousand cycles, must include at least a few cycles since the uncertainty given for the period on that page is roughly one part per thousand since a period is given:
Period [day]: 0.736539 ± 8.7e-4 Demory et al. 2016 Transit Duration [hour]: 1.5792 ± 0.0312 Winn et al. 2011
- The orbital period of the planet. Demory et al. 2016
- Duration of transit (1st to 4th contact). Winn et al. 2011
There is a sidebar on the left edge of the page that pops out with lots of bits of information and citations for each. If you hover over the description of each data field the citation appears.
How can I interpret this particular light curve and find planetary radius
Someone else will have to answer that, but in addition to the radius they also give the size of the orbit and the diameter of the star:
Rp [Rj] 0.17 ±0.01 Rs [R☉]: 0.94 a [AU]: 0.015
The radius of the planet is 0.17% of Jupiter's radius. Under the "Planet" info on the left, it says $R_P$ which is the radius of planet, and since the units are shown as $[R_J]$ this is the value is in comparison to Jupiter. It also gives the $M_P$ (mass of planet) in relation to $M_J$ (mass of Jupiter) as well.
The interesting thing here is the size of the star - it's smaller than our Sun.
To get the radius of the planet, find the radius of Jupiter and multiply it by 0.17.
A "year" on that planet is shorter than one of our days and it's orbiting extremely close to its host star, as well. The distance is given as 0.015 AU (astronomical unit which is the distance from the Earth to the Sun).