Detection of Highly Ionized N and O in the Infrared Spectrum of Nova MUSCAE 1983

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This bright nova was discovered in January 1983 by Liller (1983, lAU Circular No. 3764), just before our scheduled infrared observing runs at the ESO 3.6 m and 1 m telescopes during which we were able to both monitor it photometrically between 1.2 um and 10 I-tm and obtain low resolution 1.4-4.2 um spectra. A detailed description and analysis of these data will be contained in an extensive paper combining ultraviolet, optical and infrared observations, which is now being prepared mostly by J. Krautter. As, to our knowledge, no previous infrared spectra of novae between 1 um and 2 um have been published, we would like to make use of this short article to report the discovery of a strong but broad emission feature at 1.56 um which we can best explain at the moment as an unresolved group of recombination lines to He 11, OV and NV - species normally associated with UV rather than IR spectroscopy

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