This page lists the three events involved in acquiring the Crystal ship and crew member.
Dense Asteroid Field Distress Call is first, then Zoltan Research Facility, then Ancient Device. The Crystal crew member is acquired in the second.
“This event is called in the data.dat file. This is a Random Event. Occurs in:Zoltan Research Facility
“This event is called "ASTEROID_DERELICT_SHIP" in the datafiles. You can encounter this event...Dense Asteroid Field Distress Call