SETI public: Relativistic communications

• Previous message: LARRY KLAES: "SETI public: Fw: Space-Weather-Outlook"

On a topic somewhat related to recent discussions, I realize that there is optical SETI, but I wonder if any studies have been conducted concerning the following:

Suppose a society wanted to send a message to a relativistic probe that it had
launched. I.e. the probe would be traveling away from its home star at a
velocity close to the speed-of-light. Also, assuming that they wanted to
communicate with the probe using radio frequencies. Then to account for doppler (red) shifting of the message as received by the relativistic spacecraft - the society would need to send the messages at x-ray or gamma ray frequencies.

Since the message would be s-t-r-e-t-c-h-e-d in duration (as received by the
spacecraft), the message would probably seem like a "burst" to a "stationary" line-of-sight observer. So, I'm wondering if any analysis of gamma ray bursts has been done to see if they contain any "structure" or modulation?

Thanks,
Dale Hooper.

• Previous message: LARRY KLAES: "SETI public: Fw: Space-Weather-Outlook"

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