Added iris.sg.SpectrographObservation.timedelta field which stores the exposure time for each frame of the observation.
#114
| Job | Run time |
|---|---|
| 1m 43s | |
| 1m 53s | |
| 3m 0s | |
| 3m 55s | |
| 1m 23s | |
| 1m 40s | |
| 13m 34s |