Electronic Telegram No. 3592
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


NOVA SCORPII 2013 = PNV J17335943-3606216
     R. Rudy and R. Russell, Aerospace Corporation; M. Sitko and K. Wagner,
Space Science Institute; and D. Griep, Infrared Telescope Facility (IRTF),
report on 0.8- to 5.3-micron and 0.8- to 2.4-micron spectroscopy of N Sco
2013 that was acquired on July 16 and July 17 UT, respectively, using the
Spex instrument on the IRTF.  The nova has formed dust, the thermal emission
from which dominates the spectrum beyond 1.5 microns.  The dust emission is
well-matched by a Planck function with a temperature of 930 +/- 30 K.  The
He I line at 1.083 microns is now the strongest line in the spectrum, but the
O I lines are still present and still indicate a reddening value of E(B-V) =
2.0 (the value reported by Rudy et al. on CBET 3567 as occuring before dust
formation, which is interstellar in origin).  This indicates that either we
have a preferred line-of-sight to the nova that is clear of the recently
formed dust, or that the covering factor factor of the dust region is not
large.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 July 23                     (CBET 3592)              Daniel W. E. Green