Central Bureau for Astronomical Telegrams

IAUC 8132: V4745 Sgr; 2003cg, 2003du,, 2003ef

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                                                  Circular No. 8132
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


V4745 SAGITTARII
     N. M. Ashok and D. P. K. Banerjee, Physical Research
Laboratory (PRL), Ahmedabad, report near-infrared spectroscopy
(range 1.08-2.30 microns) of V4745 Sgr with the Mt. Abu 1.2-m
telescope (+ PRL Near Infrared Imager Spectrometer) on Apr. 28.9
UT.  The spectra show strong H I emission lines at Paschen_beta,
Brackett_gamma, and Brackett 11 to 17.  An additional weak emission
line is seen at 1.316 microns, attributable to O I.
     T. Kato, Kyoto University, reports that a spectrum of V4745
Sgr, taken by M. Fujii (Fujii Bisei Observatory) on May 8.79 UT,
shows it to be a nova of Fe II class, with strong Balmer lines
having P-Cyg profile.
     V4745 Sgr brightened to visual mag about 8.0 around May 8-12
before fading again.  Photoelectric photometry of V4745 Sgr by A.
C. Gilmore and P. M. Kilmartin at the University of Canterbury's
Mt. John Observatory (cf. IAUC 8127):  May 4.610 UT, V = 9.51, U-B
= -0.95, B-V = -0.03, V-R = +0.49, V-I = +0.23, air mass 1.10;
5.446, 9.50, -0.92, -0.03, +0.49, +0.22, 1.68; 11.600, 8.11, -0.75,
+0.14, +0.21, +0.39, 1.09; 14.694, 9.22, -0.95, +0.01, +0.43,
+0.31, 1.03; 15.588, 9.69, -0.97, +0.00, +0.61, +0.32, 1.09;
16.585, 10.34, -1.06, +0.03, +0.90, +0.44, 1.09.  Additional CCD
photometry:  May 10.152, B = 8.37 (W. Liller, Vina del Mar, Chile);
10.155, V = 8.09 (Liller); 12.423, V = 8.35 (J. D. West, Mulvane,
KS).
     L. Kiss and A. Jacob, University of Sydney, report:  "Optical
spectra (0.05 nm/pixel, ranges 350-450 and 610-700 nm) were
obtained during the rebrightening of this nova on May 12.66 and
13.67 UT with the Siding Spring 2.3-m telescope (+ DBS CCD
spectrograph).  The Balmer hydrogen series of emission lines shows
complex multiple P-Cyg profiles.  The H_alpha emission component
has a 1600 km/s FWHM, while four distinct absorption components can
be identified at -900, -1300, -1600, and -1800 km/s.  The H_gamma,
H_delta, and H_epsilon lines have similar profiles, with comparably
strong Fe II emission lines at 417.6 and 423.3 nm, also with P-Cyg
profiles."


SUPERNOVAE 2003cg, 2003du, AND 2003ef
     Further to IAUC 8117, W. M. Wood-Vasey reports the following
prediscovery magnitudes of SN 2003ef (cf. IAUC 8131) from NEAT
Haleakala images:  Feb. 16.47 UT, [19.6; Apr. 20.31, 19.5; 27.38,
17.5.
     CCD R magnitudes by K. Hornoch, Lelekovice, Czech Rep.:
SN 2003cg in NGC 3169, Mar. 23.994 UT, 14.5; 29.974, 13.9; Apr.
4.958, 14.3; 8.937, 14.3; 21.900, 14.8; 24.896, 14.9; May 3.883,
15.4.  SN 2003du in UGC 9391, Apr. 24.937, 14.8; 27.910, 14.1; May
3.899, 13.5; 6.858, 13.4; 7.875, 13.4.

                      (C) Copyright 2003 CBAT
2003 May 17                    (8132)            Daniel W. E. Green

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