Electronic Telegram No. 2157
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)
URL http://www.cfa.harvard.edu/iau/cbat.html


U SCORPII
     Further to CBET 2153, R. K. Das, D. P. K. Banerjee, and N. M. Ashok,
Physical Research Laboratory, Ahmedabad, report additional near-infrared J-,
H-, and K-band spectroscopy and photometric observations of U Sco using the
Mt. Abu 1.2-m telescope (+ NICMOS3 Imaging Spectrometer).  Magnitudes for
U Sco on Jan. 28.9 UT:  J = 6.99, H = 6.72, K = 6.32 (with typical errors of
0.03 magnitude).  Subsequent to the spectroscopy reported on CBET 2153, JHK
spectra were also obtained on Jan. 29.98, showing that the H I and He I lines
have strengthened in terms of the peak-to-continuum ratio.  No significant
change is seen in the FWZI of the lines from their earlier reported value of
10000 km/s.  However, the peaks of the the H I lines (Paschen-beta and
Brackett-gamma) have become considerably flatter, and the triple-peaked
structure seen earlier (CBETs 2152, 2153) is not prominent now.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 January 30                  (CBET 2157)              Daniel W. E. Green