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IAUC 6861: SNe; 1SAX J0544.1-710

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                                                 Circular No. 6861
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
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVAE
     P. Garnavich, Center for Astrophysics, reports that the High-Z
Supernova Search Team (IAUC 6160, 6646) has discovered 11
supernovae on CCD images taken with the Cerro Tololo 4-m telescope
by N. Suntzeff, M. Phillips, R. C. Smith, A. Clocchiatti, A.
Diercks, P. Challis, and B. Schmidt.  The supernovae were
identified by subtracting images taken on Jan. 23-24 and Feb. 26-27
UT from those obtained Mar. 25-26, and confirmed with spectra and
images taken on Mar. 5, 26, and 27 with the Keck-2 telescope by A.
V. Filippenko, A. G. Riess, D. C. Leonard, and E. C. Moran.

SN        1998 UT       R.A.  (2000)  Decl.      I      z    type
1998ac    Feb. 27    9 31 20.00  - 5 16 24.3    23.7   0.46   Ia
1998ad    Mar. 25    9 29 55.71  - 5 21 59.3    23.4   0.44   II?
1998ae    Mar. 25    9 30 47.53  - 4 38 51.0    23.9   1.1     ?
1998af    Mar. 25    9 30 36.98  - 5 04 51.1    23.7   0.23   II
1998ag    Mar. 25   13 43 36.42  + 0 08 02.2    23.5   0.67   Ia
1998ah    Mar. 26    9 28 15.74  - 5 21 57.9    22.6   0.43   Ia
1998ai    Mar. 26   13 42 27.59  - 0 06 47.2    22.7   0.49   Ia
1998aj    Mar. 26    9 27 55.76  - 4 59 56.9    24.1   0.83   Ia
1998ak    Mar. 26   13 44 16.22  - 0 10 49.3    23.7   0.74   Ia?
1998al    Mar. 26   13 43 05.37  - 0 25 43.0    23.4   0.71   Ia
1998am    Mar. 26   13 41 21.38  - 0 32 33.8    23.8   0.24   II

The supernovae are within 2" of their host galaxies.  Finder charts
may be requested by sending electronic mail to
pgarnavich@cfa.harvard.edu.


1SAX J0544.1-710
     G. Cusumano, T. Mineo, and L. Nicastro, Istituto di Fisica
Cosmica ed Applicazioni all'Informatica, CNR, Palermo; and G. L.
Israel, Osservatorio Astronomico di Roma, report the discovery of a
new x-ray pulsar, designated as 1SAX J0544.1-710, during a BeppoSAX
observation of the Large Magellanic Cloud on 1996 Oct. 27-28:  "The
source position is R.A. = 5h44m06s, Decl. = -71o00'.7 (equinox
2000.0; estimated error radius 40").  The source shows pulsations
at a period of 96.079 +/- 0.007 s with a nearly sinusoidal pulse
profile.  The energy spectrum is well modelled by an absorbed power
law with photon index 0.52 +/- 0.08.  The unabsorbed flux is 2.9 x
10E-12 erg sE-1 cmE-2 in the energy band 2-10 keV.  A public ASCA
observation performed on 1996 Sept. 6 confirms the presence of the
96-s pulsations.  ROSAT and Einstein data suggest the transient
nature of the source."

                      (C) Copyright 1998 CBAT
1998 April 4                   (6861)            Daniel W. E. Green

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