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IAUC 8392: 2004dw; 2004dx; V1187 Sco

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IAUC number

                                                  Circular No. 8392
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2004dw IN UGC 11394
     T. Puckett and J. Newton report the discovery of an apparent
supernova (mag 17.2) on an unfiltered CCD frame taken with the
Puckett Observatory 0.35-m automated supernova patrol telescope in
Ellijay, GA, on Aug. 19.19 UT (and confirmed by Puckett on frames
taken on Aug. 20.17 with a 0.60-m reflector).  The new object is
located at R.A. = 19h03m38s.25, Decl. = +27o36'54".5 (equinox
2000.0), which is 25".3 east and 31".3 north of the center of UGC
11394.  SN 2004dw was not present on images taken by Puckett on
2003 Apr. 23 and four other nights back to 2000 (limiting mag about

SUPERNOVA 2004dx IN MCG +07-37-36
     T. Boles, Coddenham, Suffolk, England, reports the discovery
of an apparent supernova (mag 18.1) on unfiltered CCD images taken
on Aug. 19.953 and 21.950 UT with a 0.35-m reflector.  The new
object is located at R.A. = 18h18m06s.15, Decl. = +39o49'24".9
(equinox 2000.0), which is approximately 2".4 east and 6".3 south
of the center of MCG +07-37-36.  SN 2004dx is not present on Boles'
images from June 27 and May 18 (limiting mag 19.5), and it is not
present on Digitized Sky Survey red (1992) or blue (1989) plates.

     D. K. Lynch, R. W. Russell, Aerospace Corporation; S. J. Bus
and W. Golisch, University of Hawaii; and T. Harrison, New Mexico
State University, report further infrared spectroscopy of this nova
(cf. IAUC 8386) using SpeX (range 0.8-2.5 microns) at the Infrared
Telescope Facility on Aug. 13.3 UT, when the nova's magnitude was K
about 6.8.  The spectrum was dominated by H I emission lines with a
Doppler width (FWHM) of about 3000 km/s; the profiles showed a
broad and a narrow (about 1000 km/s) component and were fairly
symmetric.  Also present were the Lyman-beta-fluoresced O I lines
and weak He I line emission at 1.0830 and 2.0581 microns.  There
was no evidence of thermal emission from dust at longer wavelengths
or of the CO first overtone at 2.3 microns.  With a decline rate of
2 visual magnitudes in seven days (based on the AAVSO light curve),
this rapidly fading nova should begin showing coronal lines in the
next few weeks.

                      (C) Copyright 2004 CBAT
2004 August 24                 (8392)            Daniel W. E. Green

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