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IAUC 7441: 2000cp; AX J0057.4-7325, SMC X-2; 2000cn

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                                                  Circular No. 7441
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 2000cp IN PGC 57064
     M. Modjaz, S. Beckmann, C. Yu, and W. D. Li, University of
California at Berkeley, on behalf of the Lick Observatory Supernova
Search (cf. IAUC 6627, 7126), report the discovery with the 0.8-m
Katzman Automatic Imaging Telescope of an apparent supernova in the
Abell cluster 2151.  SN 2000cp (mag about 18.0) was discovered on
an unfiltered image taken on June 21.3 UT, and was confirmed on an
earlier image taken on June 15.3 (mag about 18.8).  SN 2000cp is
located at R.A. = 16h05m27s.62, Decl. = +17o49'48".8 (equinox
2000.0), which is between the two apparent nuclei of PGC 57064
and is 3".3 west and 1".7 north of the southern nucleus.  An
unfiltered image of the field taken on June 11.3 showed nothing at
the position of SN 2000cp (limiting mag about 19.0).


AX J0057.4-7325 AND SMC X-2
     K. Torii, National Space Development Agency of Japan; T.
Kohmura, Osaka University; and J. Yokogawa and K. Koyama, Kyoto
University, communicate:  "An ASCA observtion made on Apr. 25-26
detected coherent pulsations of period 101.42 +/- 0.06 s from a new
source in the Small Magellanic Cloud, designated AX J0057.4-7325
and located at R.A. = 0h57m27s.0, Decl. = -73o25'31" (equinox
2000.0; error radius 1').  The spectrum is characterized by a flat
power-law function with photon index 0.9 and x-ray flux 2.4 x
10**-12 erg cm**-2 s**-1 (0.7-10 keV).  Within the error region is
located a ROSAT source, RX J0057.3-7325 (Kahabka et al. 1999, A.Ap.
Suppl. 136, 81).  Coherent pulsations of period 2.37230 +/- 0.00004
s from SMC X-2, a 2.37-s pulsar (IAUC 7402), were also found in the
same observation.  The photon index and x-ray flux of SMC X-2 were
0.6 and 1.0 x 10**-11 erg cm**-2 s**-1 (0.7-10 keV), respectively."


SUPERNOVA 2000cn IN UGC 11064
     K. Krisciunas, University of Washington; and F. Deglman and
R. McMillan, Apache Point Observatory (APO), report preliminary
photometry (accurate to +/- 0.02 mag) of SN 2000cn (IAUC 7436),
using the APO 3.5-m telescope:  June 12.24 UT, V = 16.63, B-V =
+0.18, V-R = +0.15, V-I = +0.05; June 16.23, 16.68, +0.35, +0.13,
-0.07.

                      (C) Copyright 2000 CBAT
2000 June 21                   (7441)            Daniel W. E. Green

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