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IAUC 7976: V4743 Sgr = ANOTHER N IN Sgr; 2002fk; V838 Mon

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                                                  Circular No. 7976
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


V4743 SAGITTARII = ANOTHER NOVA IN SAGITTARIUS
     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the designation V4743 Sgr has been given to this nova (cf. IAUC
7975).
     T. Kato, Kyoto University, reports that six prediscovery Tri-X
400 films taken by T. Hishikura (Yokohama, Kanagawa, Japan) around
Sept. 18.465 UT with a 200-mm f/2.8 camera lens shows the nova at
mag 5.5.  CCD photometry by J. D. West, Mulvane, KS:  Sept. 23.070,
V = 6.37.  Further visual magnitude estimates:  Sept. 21.448, 5.5
(A. Beresford, Adelaide, S. Australia); 21.993, 6.0 (J. Garcia,
Rama Caida, Argentina); 22.10, 6.1 (A. Hale, Cloudcroft, NM;
moonlight); 22.354, 6.2 (J. Bedient, Honolulu, HI); 22.523, 6.2 (A.
Pearce, Nedlands, W. Australia); 22.912, 6.3 (A. Amorim,
Florianopolis, Brazil; moonlight); 23.322, 6.3 (Bedient); 23.365,
5.8 (S. J. O'Meara, Volcano, HI); 23.496, 6.1 (Pearce); 23.867, 6.2
(L. Parmeggiani, Bray-et-Lu, France).


SUPERNOVA 2002fk IN NGC 1309
     K. Ayani, Bisei Astronomical Observatory (BAO); and H.
Yamaoka, Kyushu University, write:  "A low-resolution spectrum
(range 500-700 nm) of SN 2002fk (cf. IAUC 7973), obtained with BAO
1.01-m telescope on Sept. 20.7 UT, indicates that it is a type-Ia
supernova before maximum light.  Adopting the NASA/IPAC
Extragalactic Database recession velocity of 2135 km/s, the
expansion velocity deduced from Si II (rest 635.5 nm) is about
10900 km/s."
     CCD photometry, unfiltered unless otherwise noted:  Sept.
12.110 UT, [18.0 (L. A. G. Monard, Bronberg Ridge, near Pretoria,
S. Africa); 19.848, 14.5 (Monard); 20.095, 14.4 (Monard); 20.421, V
= 14.1 (J. D. West, Mulvane, KS); 21.003, 14.1 (Monard); 21.998,
13.9 (Monard); 23.099, 13.7 (Monard).


V838 MONOCEROTIS
     A. M. Watson and R. Costero, Instituto de Astronomia,
Universidad Nacional Autonoma de Mexico, report the following
magnitudes obtained at the Observatorio Astronomico Nacional 2.1-m
telescope (+ CID camera) on Sept. 19 UT:  [7.7 microns] = 2.1:,
[8.7 microns] = 1.5, [9.7 microns] = 1.3, [10.3 microns] = 1.3,
[11.7 microns] = 1.2, [12.5 microns] about 1.3; [18 microns] = [1.0
(not detected).  The star has brightened in the range 8.7-11.9
microns by about 3 mag since January (cf. IAUC 7831).

                      (C) Copyright 2002 CBAT
2002 September 23              (7976)            Daniel W. E. Green

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