Fig. 3

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2D unrectifled spectrum of a point source taken with F170LP/G235H and the SUB2048 (32 × 2048) subarray. Top panel: blue part of the spectrum recorded on the NRS1 detector, while bottom panel: red part of the spectrum recorded simultaneously on the NRS2 detector. The slightly slanted (due to slit tilt, see Paper I for details) lines mark the wavelengths.
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