Order-sorting image_Mrk 421_obsid_27017 Dispersion coordinates field image_Mrk 421_obsid_27017 Sky field image_Mrk 421_obsid_27017 Source region detail images_Mrk 421_obsid_27017 Light curve_Mrk 421_obsid_27017 Flux spectrum (1)_Mrk 421_obsid_27017 Flux spectrum (2)_Mrk 421_obsid_27017 Counts spectrum_Mrk 421_obsid_27017 Flux Preview_Mrk 421_obsid_27017