Electronic Telegram No. 2210
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


V407 CYGNI
     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.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 March 18                    (CBET 2210)              Daniel W. E. Green