Magnetic fan-spine topology showing the UV brightening at the 3D null and QSEB at the footpoint of the inner spine. This resembles the sketch shown in Fig. 2c. The inner spine is situated on negative polarity, and the dome footpoints connect to the nearby positive polarities. The height of the 3D null is 2.3 Mm above the photosphere. The QSEB is shown in both Hβ +0.6 Å and in the Hβ core. The yellow arrow shows the direction to the nearest limb.