X-ray dips and a complex UV/X-ray cross-correlation function in the black hole candidate MAXI J1820+070

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MAXI J1820+070, a black hole candidate first detected in early March 2018, was observed by XMM-Newton during the outburst rise.

• In this letter we report on the spectral and timing analysis of the XMM-Newton X-ray and UV data, as well as contemporaneous X-ray data from the Swift satellite.
• The X-ray spectrum is well described by a hard thermal Comptonization continuum.
• The XMM-Newton X-ray light curve shows a pronounced dipping interval, and spectral analysis indicates that it is caused by a moderately ionized partial covering absorber.