Lensed image A2: upper panel shows the Hβ map integrated over (4855–4859 Å or from −400 to −140舁km舁s⁻¹); lower panel shows the Hβ detected at −400舁km舁s⁻¹. Intensities are in units of 10⁻¹⁷舁erg舁cm⁻²舁s⁻¹. From this figure, we see that Hβ is detected in −400舁km舁s⁻¹ in the outflowing part. Contours show 3σ and 5σ significance.