Image Details
Caption: Figure 8.
Hard X-ray (black) and UV (violet) LCs during the NGC 3783 flare observed by XRISM/Xtend and the XMM-Newton Optical Monitor (UVW1, UVW2, and UVM1 filters combined). The UV flare lags behind the hard X-ray one by ∼60 ks, although UV uncertainties impede an accurate estimate. Such a lag implies the UV-emitting region is ∼400 Rg from the reconnection event. The gradual rise of the UV flare can represent the size of the UV-emitting region of ∼180–360 Rg.
© 2026. The Author(s). Published by the American Astronomical Society.