Added iris.sg.SpectrographObservation.timedelta field which stores the exposure time for each frame of the observation.
#119
| Job | Run time |
|---|---|
| 2m 10s | |
| 2m 20s | |
| 4m 23s | |
| 3m 55s | |
| 2m 31s | |
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| 16m 57s |