Flux-calibrated spectrum of comet 103P/Hartley 2 acquired on October 27, 2010 where the strongest cometary emissions in the optical range (CN, C2, C3, and NH2) are marked. The slit was positioned as indicated in Fig. 1. The spatial scale covers from the optocentre up to ~12 000 km in both directions. The spatial resolution is ~23 km/pix. The spectral wavelength range runs from 366.0 to 780.3 nm with resolution 0.33 nm/pix. The colour code stretches from 0 to 5 × 10-16 erg cm-2 s-1 Å-1.
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