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20022008
most citedThe XMM-Newton Serendipitous Survey V. Optical identification of the XMM-Newton Medium sensitivity Survey (XMS)

89 citations · 163 across the 5 of their papers we have counts for

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astro-ph2008★ 6 cited

Structure function of the UV variability of Q0957+561

L. J. Goicoechea, V. N. Shalyapin, R. Gil-Merino +1

We present a detailed structure function analysis of the UV variability of Q0957+561. From new optical observations, we constructed normalized structure functions of the quasar lum…

astro-ph2008★ 35 cited

New two-colour light curves of Q0957+561: time delays and the origin of intrinsic variations

V. N. Shalyapin, L. J. Goicoechea, E. Koptelova +2

We extend the gr-band time coverage of the gravitationally lensed double quasar Q0957+561. New gr light curves permit us to detect significant intrinsic fluctuations, to determine…