SIMBAD references

N. M. Ashok, D. P. K. Banerjee, V. Joshi, and S. Naik, Physical Research Laboratory, Ahmedabad, report near-infrared JHK spectroscopy with the Mt. Abu 1.2-m telescope (+ PRL Near-Infrared NICMOS3 Imaging Spectrometer) of the nova V2491 Cyg (cf. IAUC 8934, 8935, 8938; CBET 1334) that has been reported to be a pre-nova x-ray source (http://www.astronomerstelegram.org/?read=1473, and/?read=1478). Spectra taken on Apr. 18 and 20 are rather similar and show broad H I emission lines of Paschen_beta and Paschen_gamma (blended with He I 1.0830-microns) in the J band, Brackett_gamma in the K band, and other Brackett series lines in the H band. The O I lines at 1.1288 and 1.3166 microns and He I at 2.0585 microns are prominent; weak emission in the N I lines at 1.1762 and 1.2462 microns is also possibly seen. The FWHM of the strongest H I lines seen (Paschen_beta and Brackett_gamma) are in the range 3900-4300 km/s, and the profiles of the emission lines show a complex structure. CCD magnitudes for V2491 Cyg: Apr. 19.113 UT, B = 9.97 ± 0.06 (E. Forne, L'Ampolla de Mar, Tarragona, Spain); 19.099, V = 9.79 ± 0.09 (Forne); 19.090, R = 8.96 ± 0.08 (Forne); 19.130, I = 9.00 ± 0.16 (Forne); 20.014, V = 9.87 ± 0.02, B-V = +0.09 ± 0.03 (M. M. M. Santangelo, Capannori, Italy, 0.30-m telescope + SSP-5A photometer; comparison star HDE 331152).