Radio Difference Images (IMAGE) Max-Planck-Gesellschaft Caption This time series of radio difference images (with respect to the temporal average image) of the innermost part of M87 shows a substantial brightening of the innermost core region in spring 2008, which coincides with the period of increased very high energy gamma-ray emission. Credit Image: MAGIC/HESS/VERITAS/VLBA-Team Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.