What is the method for finding peak time from a given diagram?

[princejan7]

Homework Statement

I am trying to find the peak time and %OS from the diagram

Homework Equations

The Attempt at a Solution

I know how to get the %OS but for the peak time, isn't it just the time of the first peak, so around 1.1s? But the answer I am supposed to be getting is 0.0922s

 

[gneill]

Your attached figure lacks information concerning the scales on the X and Y axes, and the observed peak is crowded towards the left side of the image and won't yield much in the way of accuracy for measurements made on it concerning that peak. The answer you claim that you're suppose to get for the time of the peak has three significant figures. Do you think you can measure to that kind of accuracy on the given image?

The peak time is likely to be the amount of time after the step transition that the peak occurs. Note that the step does not happen at t = 0 in the figure; the step occurs at t = 1 <something>. Where the <something> is meant to represent the units that aren't specified...