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IAUC 7645: 2001cp; 2001ck; 2001cm; C/2001 A2

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                                                  Circular No. 7645
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)


SUPERNOVA 2001cp IN UGC 10738
     M. Modjaz and W. D. Li, University of California at Berkeley,
report the discovery by LOTOSS (cf. IAUC 7514) of an apparent
supernova in unfiltered images taken with the Katzman Automatic
Imaging Telescope (KAIT) on June 19.3 (mag about 16.5) and 20.3 UT
(mag about 16.3).  SN 2001cp is located at R.A. = 17h11m02s.58,
Decl. = +5 50'26".8 (equinox 2000.0), which is 49".1 west and 40".0
south of the nucleus of UGC 10738.  A KAIT image taken on June 12.3
showed nothing at this position (limiting mag about 19.0).


SUPERNOVA 2001ck IN UGC 9425
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
2001ck (cf. IAUC 7441), obtained by P. Berlind on June 17.28 UT
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-Ia supernova near maximum
light.  Adopting the NASA/IPAC Extragalactic Database (NED)
recession velocity of 10 408 km/s for the host galaxy, the
supernova expansion velocity is about 11 000 km/s for Si II (rest
635.5 nm).  The spectral-feature age of the supernova (Riess et al.
1997, A.J. 114, 722) is 3 +/- 2 days after maximum light.


SUPERNOVA 2001cm IN NGC 5965
     Matheson et al. add that a spectrum of SN 2001cm (cf. IAUC
7441), obtained as above on June 17.30 UT, shows it to be a type-II
supernova near maximum light.  The spectrum consists of a very blue
continuum with superposed P-Cyg lines of hydrogen.  Adopting the
NED recession velocity of 3412 km/s for the host galaxy, the
expansion velocity derived from the minimum of the H-beta line is
about 10 000 km/s.


COMET C/2001 A2 (LINEAR)
     Visual m_1 and coma-diameter estimates:  May 11.44 UT, 5.3, 7'
(A. Pearce, Nedlands, W. Australia, 20x80 binoculars); 21.40, 5.1,
7' (M. Mattiazzo, Wallaroo, S. Australia, 7x50 binoculars); June
5.37, 4.9, 12' (J. G. de S. Aguiar, Campinas, Brazil, 11x80
binoculars); 6.90, 4.6, 7' (Pearce); 11.91, 3.6, 14' (Pearce, 8x40
binoculars); 12.82, 3.3, 12' (Mattiazzo, naked eye; moonlight);
15.33, 3.5, 15' (W. Souza, Joaquim Egidio, Brazil, 8x30
binoculars); 17.32, 3.9, -- (Aguiar, naked eye); 18.79, 4.3, 15'
(Mattiazzo; with 25x100 binoculars, tail > 4.5 deg long in p.a.
219 deg); 19.90, 4.6, 14' (Pearce).

                      (C) Copyright 2001 CBAT
2001 June 20                   (7645)            Daniel W. E. Green

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