Euclid: the potential of slitless infrared spectroscopy: a z = 5.4 quasar and new ultracool dwarfs

Stars: brown dwarfsStars: individual: EUCL J174429.80 + 672728.1,EUCL J002516.31-491618.5Quasars: individual: EUCL J181530.01 + 652054.0