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V818 Sco (Sco X-1) campaign

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V818 Sco (Sco X-1) campaign

AAVSO Alert Notice 662 announces an observing campaign on the X-ray binary V818 Sco (Sco X-1) underway now. Please see the Alert Notice for details and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484