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IAUC 7691: 2001dw; V2275 Cyg = N Cyg 2001 No. 2

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                                                  Circular No. 7691
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2001dw IN NGC 1168
     G. M. Hurst, Basingstoke, England, reports the discovery of an
apparent supernova (mag 16.6) by T. Boles, Coddenham, England, on
unfiltered CCD images obtained on Aug. 25.125 (limiting mag 19) and
25.989 UT (poor conditions) with a 0.36-m Schmidt-Cassegrain
telescope for the U.K. Nova/Supernova Patrol.  The new object is
located at R.A. = 3h00m47s.88, Decl. = +11o46'27".5 (equinox
2000.0), which is 13" west and 9".5 south of the center of NGC 1168.
A confirming image obtained by A. Oksanen, Nyrola Observatory,
Finland, on Aug. 26.025 with a 0.36-m Schmidt-Cassegrain telescope
yields the following position end figures for SN 2001dw:  47s.84,
26".7.  The new object was absent from a master image taken by
Boles on 1999 Nov. 2, and it does not appear on second Palomar Sky
Survey images from 1990 (blue) and 1991 (red).


V2275 CYGNI = NOVA CYGNI 2001 No. 2
     N. N. Samus, Institute of Astronomy, Moscow, informs us that
the designation V2275 Cyg has been given to the nova reported on
IAUC 7686, 7687, and 7688.
     T. Kato, Kyoto University, reports the following additional
magnitudes for V2275 Cyg:  Aug. 17.615 UT, [11.5 (H. Yoshida,
Sapporo, Hokkaido, Japan; 55-mm f/2.8 camera lens + Fujichrome
TREBI 400 film); 17.585, [8.6: (Yoshida; emulsion uncertain);
18.506, 8.8 (Yoshida; 35-mm f/2.8 camera lens + Kodak Gold-Max 800
film); 18.512, 9.0 (H. Nishimura, Kakegawa, Shizuoka, Japan; 105-mm
camera lens + T-Max 400 film); 18.544, 8.8 (Yoshida; Gold-Max 800
film).
     Additional CCD V magnitudes (S = G. Sostero and A. Lepardo,
Remanzacco, Italy; R = D. Rodriguez, Madrid, Spain; W = J. D. West,
Mulvane, KS):  Aug. 20.83 UT, 7.36 (S); 20.875, 6.7 (R); 21.090,
7.66 (W); 21.82, 8.05 (S); 22.106, 8.02 (W); 23.82, 8.55 (S);
25.01, 9.07 (S); 25.106, 9.01 (W; clouds); 26.01, 9.26 (S).
Cousins I magnitudes by West:  Aug. 21.088, 5.53; 22.107, 5.83;
25.094, 7.00 (clouds).  Color photometry by Sostero and Lepardo:
Aug. 20.83, B-V = +1.05, V-R_c = +0.7, R_c-I_c = +1.2; 21.82,
+1.04, +0.91, +1.24; 23.82, +1.0, +1.0, +1.1; 25.01, +1.0, +1.1,
+1.0; 26.01, +0.95, +1.1, +1.0.

                      (C) Copyright 2001 CBAT
2001 August 26                 (7691)            Daniel W. E. Green

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