- Conference date: 7–11 July 2008
- Location: Heidelberg (Germany)
VHE gamma‐ray emission was discovered from the high‐frequency‐peaked BL Lac object RGB in November 2007. The instantaneously triggered multiwavelength observations with the X‐ray satellites Swift and RXTE, the optical telescope ATOM and the radio telescope Nancay provided the first simultaneous SED for RGB While these and further observations with H.E.S.S. gives no indication for variability, the follow‐up observations until January 2008 with Swift (X‐ray and UV‐optical telescope) and ATOM (optical) show flux variations on time scales of ∼10 days with different variability patterns. This non‐monotonically flux variation of the simultaneous multiwavelength observations lead to the conclusion that the shape of the synchrotron spectrum changes.
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