Central Bureau for Astronomical Telegrams
IAUC 7709: V4740 Sgr; N IN M31; 2001ed
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Circular No. 7709
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)
V4740 SAGITTARII
F. Patat, European Southern Observatory; C. Contreras and J.
Prieto, Pontificia Universidad Catolica de Chile; and G. Altavilla,
S. Benetti, E. Cappellaro, A. Pastorello, and M. Turatto,
Osservatorio Astronomico di Padova, report: "A low-resolution
spectrum (range 320-900 nm, resolution 1.2 nm) of this object (cf.
IAUC 7706, 7708) was obtained on Sept. 9.238 UT using the Danish
1.5-m telescope (+ DFOSC) at La Silla. The spectrum is dominated
by strong emission lines of the Balmer series of H I and by lines
of Fe II of multiplets 42, 49, and 74. The FWHM measured from the
Fe emissions is about 1200 km/s. The Na I D line has a P-Cyg
profile with the minimum of the absorption corresponding to 1500
km/s. In general, the spectrum is very similar to that of the 1989
nova V443 Sct soon after maximum (Rosino et al. 1989, A.J. 101,
1807)."
Photometry by A. C. Gilmore, Mount John Observatory,
University of Canterbury (reference stars Cousins E745 and E746):
Sept. 8.416 UT, V = 6.71, U-B = +0.31, B-V = +0.82, V-R = +0.45,
V-I = +0.88, air mass 1.15; 9.333, 7.36, -0.01, +0.69, +0.47,
+1.07, 1.03. Broadband V magnitudes by W. Liller, Vina del Mar,
Chile: Sept. 7.996, 7.04; 8.987, 7.44. Visual magnitude
estimates: Sept. 8.781, 7.5 (S. Baroni, Milan, Italy); 8.812, 6.9
(M. Reszelski, Szamotuly, Poland); 9.042, 7.1 (J. G. de S. Aguiar,
Campinas, Brazil); 9.481, 7.5 (A. Pearce, Nedlands, W. Australia).
NOVA IN M31
M. Fiaschi, F. Di Mille, and R. Cariolato, Astronomical
Observatory G. Colombo, Padua, report their discovery of an
apparent nova at R.A. = 0h42m34s.55, Decl. = +41o18'13".8 (equinox
2000.0), which is about 146" west and 124" north of the center of
M31. The CCD images were obtained with an H-alpha filter (6.3-nm
FWHM) and a 0.41-m reflector, yielding the following magnitudes:
Sept. 2.93 UT, 15.9; 3.90, 15.8. Nothing was visible at this
position on an image taken on Aug. 27.9 (limiting mag 17.5).
SUPERNOVA 2001ed IN NGC 706
W. M. Wood-Vasey, University of California at Berkeley and
Lawrence Berkeley National Laboratory, reports pre-discovery
observations of SN 2001ed (cf. IAUC 7703, 7704) taken with the
1.2-m NEAT/MSSS telescope at Haleakala on Aug. 25.32 and 25.36 UT,
which clearly show the new object in a knot in the spiral arm of
NGC 706 at unfiltered mag 15.85.
(C) Copyright 2001 CBAT
2001 September 9 (7709) Daniel W. E. Green
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