Sorry I meant Solar system widths, doing three things at once, you know how it goes.

>>Hi,
>>Gamma radiation is extremely pervasive, a 2 minute burst from a galaxy 50 galaxy width's away would still be lethal.
>>
>>For example, the bursts we are detecting are from deep space ( > 2500 light years away), and these still send the instruments off the dial.
>
>That may be so - I will have to do some research. But please note that 2500 light-years is much less than a galaxy-width. Our own galaxy is estimated to have a diameter of ca. 100,000 light-years.