SIMBAD references

Vishal Joshi, N. M. Ashok, and D. P. K. Banerjee, Physical Research Laboratory (PRL), Navrangpura, Ahmedabad, report near-infrared J-, H-, and K-band spectroscopy (range 1.08-2.35 microns) with the Mt. Abu 1.2-m telescope (+ PRL Near Infrared NICMOS3 Imaging Spectrometer) of the recent outburst of the symbiotic star V407 Cyg (cf. CBET 2199). The spectra, taken on Mar. 14.00 UT, show prominent H I emission lines of Paschen-beta and Paschen-gamma in the J band, Brackett gamma in the K band, and other Brackett lines in the H band. The O I line at 1.1288 microns is also seen, along with He I lines at 1.0830 and 2.0581 microns. The H I lines show the unusual structure of a sharp component superposed on a much broader emission – similar to the profiles of the optical Balmer emission lines reported by Munari et al. on CBET 2204. The addition of two Gaussian profiles, with 1820 km/s for the broad component and 300 km/s for the narrow component, gives a reasonably good fit to the observed Paschen-beta line profile. The relative peak intensities of the narrow and broad components are in the ratio 1.36. However, the intrinsic FWHM of the narrow component could be considerably lower after it is deconvolved with the instrument profile.