Implementing filtering of the events based on user-preferred time intervals

[yashbhargava1992]

The current version of the xpselect allows for a filtering of the events using just a single interval of time (by the use of tmin and tmax). It will be great if there is an option to include a good time interval file (basically 2 columns of start and stop times, either as a txt, npy or fits) or two arrays indicating start and stop times, which the code can parse to filter the required events.

[lucabaldini]

Thanks Yash, this seems like a perfectly sensible feature to have. I have a number of different things on my plate, at this time, and cannot guarantee that I can get around implementing this right now, but I'll drop you a message when I have something ready for testing.

And if you beat me at it, I'll happily accept a pull request :-)