SIMBAD references

R. J. Rudy, R. W. Russell, and D. K. Lynch, The Aerospace Corporation; and C. E. Woodward, University of Minnesota, report on SpeX observations (wavelength range 0.8-2.5 microns) made with the Infrared Telescope Facility (IRTF) on Mar. 13 and Apr. 12 UT: "The object continues to display a very rich emission-line spectrum. Although features of C I, N I, O I, and Fe II still persist, the Ca II infrared triplet, which was very strong in March, is nearly undetectable in the April spectrum. The He I lines are now quite strong, and He II features are beginning to emerge. The O I lines indicate a reddening of E(B-V) = 0.77. There is no indication yet of dust formation."