Order-sorting image_Mrk 421_obsid_20984 Dispersion coordinates field image_Mrk 421_obsid_20984 Sky field image_Mrk 421_obsid_20984 Source region detail images_Mrk 421_obsid_20984 Light curve_Mrk 421_obsid_20984 Flux spectrum (1)_Mrk 421_obsid_20984 Flux spectrum (2)_Mrk 421_obsid_20984 Counts spectrum_Mrk 421_obsid_20984 Flux Preview_Mrk 421_obsid_20984