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Fig. 1.

image

Mosaic of images from SST, IRIS and SDO for September 6, 2016. At this particular time both an EB and a UV burst co-existed temporally and spatially. Upper row (from left to right): SST Hα wing at −0.1 nm, SST Hα core, and IRIS SJI 279.6 nm. Second row: SST Ca II 854.2 nm wing at −0.0735 nm, SST Ca II 854.2 nm core and IRIS SJI 140 nm. Third row: SST Stokes V map in the wings of Ca II 854.2 nm, SDO/HMI magnetogram and SDO/AIA 170 nm. Fourth row: SDO/AIA 30.4 nm, SDO/AIA 17.1 nm and SDO/AIA 19.3 nm. Red and yellow contours in all the panels highlight the location of the EB and UV burst, respectively. The Stokes V map in the wings of Ca II 854.2 nm and the HMI photospheric magnetogram show that both reconnection events happen at a merger site of opposite magnetic polarities. The AIA/SDO images do not show any coronal counterpart of these reconnection events, but a diminished intensity due to absorption by the surge.

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