Electronic Telegram No. 2153
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
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U SCORPII
     N. M. Ashok, R. K. Das, 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 current outburst of
the recurrent nova U Sco (cf. IAUC 9111; CBET 2152).  The spectra, taken on
Jan. 28.993 UT with modest signal-to-noise ratio, show 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 a weaker line at 1.2465 microns that is possibly due
to N I.  He I lines at 1.0830 (blended with Paschen-gamma) and 2.0581 microns
are present.  The H I, He I, and O I lines show considerable structure at
the peaks and are all broad, with typical FWZI values of about 10000 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 January 29                  (CBET 2153)              Daniel W. E. Green