16905

From Swift monitoring of the X-ray hardness variability of a sample of Seyfert-1 active galactic nuclei (AGN) comma we have found a transient X-ray obscuration event in Mrk 841. This event was found on 2021-12-26 and confirmed again on 2022-01-02. We propose one non-disruptive HST-COS observation (1 orbit) to investigate the crucial association between the X-ray obscuration and the outflowing winds in AGN by high-resolution UV spectroscopy. Such obscuring outflows are remarkably different from the commonly-seen ionized outflows in AGN and can have important implications for the surrounding gas and the launching of AGN outflows. X-ray obscuration events have been captured with HST in only a few AGN so far comma yet the scientific yield has been immense. However comma there are still outstanding questions comma which require further investigation of these events in additional AGN. This rare opportunity would help us in addressing the existing questions on obscuring outflows and broaden our understanding of the transient obscuration events in AGN.