Purpose of the flight and payload description

The flight became a historic one: the first slowly rotating X-ray pulsar designated GX 1 + 4 was discovered; its period was measured to be about 2.3 minutes.

Details of the balloon flight

Balloon launched on: 10/15/1970
Launch site: HIBAL - Balloon Launching Station, Mildura, Victoria, Australia  
Balloon launched by: ABLS Mildura
Balloon manufacturer/size/composition: Zero Pressure Balloon Winzen 33.850.000 cuft (0.45 Mil Cap. 0.5 Mil. x 2 Stratofilm)
Balloon serial number: Serial Nº 2
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 10 h
Payload weight: 1423 lbs

External references

Images of the mission

 

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