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astro-ph2002★ 33 cited
Complex X-ray spectral variability in Mkn 421 observed with XMM-Newton
S. Sembay, R. Edelson, A. Markowitz +2
The bright blazar Mkn 421 has been observed four times for uninterrupted durations of ~ 9 - 13 hr during the performance verification and calibration phases of the XMM-Newton missi…
astro-ph2002★ 1 cited
Status of the EPIC/MOS calibration
P. Ferrando, A. F. Abbey, B. Altieri +16
The XMM-Newton observatory has the largest collecting area flown so far for an X-ray imaging system, resulting in a very high sensitivity over a broad spectral range. In order to e…