Order-sorting image_Mrk 421_obsid_16427 Dispersion coordinates field image_Mrk 421_obsid_16427 Sky field image_Mrk 421_obsid_16427 Source region detail images_Mrk 421_obsid_16427 Light curve_Mrk 421_obsid_16427 Flux spectrum (1)_Mrk 421_obsid_16427 Flux spectrum (2)_Mrk 421_obsid_16427 Counts spectrum_Mrk 421_obsid_16427 Flux Preview_Mrk 421_obsid_16427