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IAUC 8382: V1187 Sco = N Sco 2004 No. 2; 2004do

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                                                  Circular No. 8382
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the designation V1187 Sco has been given to this nova (cf. IAUC
8380, 8381).
     D. K. Lynch, R. W. Russell, and D. Kim, Aerospace Corporation;
M. Sitko, University of Cincinnati, and R. B. Perry, Langley
Research Center, NASA, report 3- to 13-microns spectroscopy of
V1187 Sco using the Infrared Telescope Facility (+ BASS; 3".4-
diameter beam) on Aug. 5.35 and 6.25 UT.  At the spectral resolving
power (30-100), the spectrum showed a fairly smooth continuum
between 3 and 10 microns that is well-fitted by a 1500-K blackbody
on Aug. 5 and by a 1400-K blackbody on Aug. 6.  Atop the continuum,
between 3.5 and 5 microns, were a number of poorly resolved
emission lines that are believed to include Br_alpha and Humphreys
lines.  Beyond 8 microns, the spectrum showed structured excess
emission.  Hu_alpha at 12.3 microns was evident, and it doubled in
strength overnight.  Also present, but as yet unidentified, were
features at 8.6, 10.6 ([S IV] ?) and 11.2 microns, each of which
also increased in strength between the Aug. 5 and 6.  Infrared
magnitudes:  Aug. 5, L = 2.9, M = 2.4, N [10.5 microns] = 1.7;
Aug. 6, 3.2, 2.7, 1.7.  The spectrum is consistent with early
development of novae near maximum light where the F-type pseudo-
photospheric continuum gives way to an emission-line spectrum that
is dominated by H I recombination lines and other low-excitation
species.  The infrared excess longward of 10 microns may represent
thermal emission from pre-existing dust, because dust formation
near maximum light is never observed.
     Magnitude estimates (visual unless otherwise noted); Aug.
5.274 UT, 9.8 (J. Bedient, Honolulu, HI); 5.840, V = 9.63 (D.
Hanzl, Brno, Czech Republic, 0.09-m reflector + CCD; comparison
star HIP 85569); 5.843, 9.8 (K. Hornoch, Lelekovice, Czech
Republic); 6.465, 9.8 (L. Kiss, Sydney, Australia); 6.836, 9.9

SUPERNOVA 2004do IN NGC 6708
     L. A. G. Monard reports his discovery of an apparent supernova
on unfiltered CCD images taken on Aug. 4.841 (mag about 16.3 +/-
0.1) and 7.772 UT (mag about 15.4 +/- 0.1) with a 0.30-m reflector
near Pretoria, South Africa.  SN 2004do is located at R.A. =
18h55m33s.72, Decl. = -53o43'22".8, which is 16" west and 3" north
of the nucleus of NGC 6708.  The new object is not visible on a red
Digitized Sky Survey image (limiting mag 20.5) or on an image taken
on 2004 June 10.87 by Monard (limiting mag 18.5).

                      (C) Copyright 2004 CBAT
2004 August 7                  (8382)            Daniel W. E. Green

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