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IAUC 8206: 2003if; C/2002 T7; V5113 Sgr = N Sgr 2003 No. 2

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                                                  Circular No. 8206
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
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SUPERNOVA 2003if IN NGC 1302
     Further to IAUC 8201, M. Ganeshalingam and W. Li report the
LOTOSS/KAIT discovery of a supernova on unfiltered KAIT images
obtained on Sept. 20.5 (at mag 17.6) and 21.5 UT (at mag 17.7).
The new object is located at R.A. = 3h19m52s.61, Decl. =
-26o03'50".5 (equinox 2000.0), which is 19".3 east and 11".9 south
of the center of NGC 1302.  A KAIT image taken on Jan. 20.2 showed
nothing at this position (limiting mag 19.0).
     T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2003if, obtained by P. Berlind on Sept. 22.46 UT with the F.
L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows
it to be a type-Ia supernova, about 3 weeks past maximum.

     H. Kawakita, Gunma Astrononomical Observatory; J. Watanabe,
National Astrononomical Observatory of Japan (NAOJ); S. Sasaki and
T. Sasaki, University of Tokyo; and N. Takato and T. Fuse, Subaru
Telescope, report near-infrared photometry (8".4 aperture) of comet
C/2002 T7, obtained on Sept. 14.57 UT with the NAOJ 8.2-m Subaru
telescope (+ CISCO) at Mauna Kea:  J = 12.7, H = 12.3, K = 12.2.
The dust coma has a J-band surface brightness of approximately 20
mag arcsec**-2 and shows an elongated shape of length 20" arcsec in
the north-south direction and width 14" in the east-west direction.
No tail structure was recognized.

     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the designation V5113 Sgr has been given to this nova (cf. IAUC
     Magnitude estimates for V5113 Sgr forwarded by T. Kato, Kyoto
University:  Aug. 23.51 UT, [10.6 (T. Hishikura, Yokoyama, Kanagawa,
Japan; Tri-X film); Sept. 14.461, [9.9 (Hishikura); 15.443, [10.1
(M. Yamamoto, Aichi, Japan; CCD); 17.424, 10.4 (H. Nishimura,
Kakegawa, Shizuoka, Japan; T-Max 400 film); 17.447, 9.7 (K. Haseda,
Aichi, Japan; T-Max 400 film; near detection limit); 18.433, 9.1
     Visual magnitude estimates: Sept. 19.934 UT, 9.1 (R. Y. Shida,
Sao Paulo, Brazil); 20.319, 9.2 (J. Bedient, Honolulu, HI); 20.815,
9.2 (P. Schmeer, Bischmisheim, Germany); 21.745, 9.6 (A. Baransky,
Pylypovychi, Ukraine); 21.779, 10.0 (K. Hornoch, Lelekovice, Czech

                      (C) Copyright 2003 CBAT
2003 September 22              (8206)            Daniel W. E. Green

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