Order-sorting image_Mrk 421_obsid_20724 Dispersion coordinates field image_Mrk 421_obsid_20724 Sky field image_Mrk 421_obsid_20724 Source region detail images_Mrk 421_obsid_20724 Light curve_Mrk 421_obsid_20724 Flux spectrum (1)_Mrk 421_obsid_20724 Flux spectrum (2)_Mrk 421_obsid_20724 Counts spectrum_Mrk 421_obsid_20724 Flux Preview_Mrk 421_obsid_20724