Order-sorting image_Mrk 421_obsid_16424 Dispersion coordinates field image_Mrk 421_obsid_16424 Sky field image_Mrk 421_obsid_16424 Source region detail images_Mrk 421_obsid_16424 Light curve_Mrk 421_obsid_16424 Flux spectrum (1)_Mrk 421_obsid_16424 Flux spectrum (2)_Mrk 421_obsid_16424 Counts spectrum_Mrk 421_obsid_16424 Flux Preview_Mrk 421_obsid_16424