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IR Atlas of a Dark Sunspot Umbra from 1.16 to 5.1 um (1Jun92)
(from NSO, NOAO Newsletter No. 30, 1 June 1992)

This is an FTS spectral atlas of a sunspot umbra, with identifications
where possible. Like the previous photospheric atlas, consecutive
observations were used to extrapolate the observation to zero airmass,
thus removing the telluric component. For reference, the original
uncorrected spectrum is also displayed. Spectral type is estimated to
be between K5 and M1.  The field strength was 3360 Gauss. This atlas is
available free as NSO Technical Report #92-001. A version on magnetic
tape can be had by submitting your own 2400 foot reel, or, optionally
for $20, NOAO will supply the tape.

Bill Livingston, Lloyd Wallace

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