Central Bureau for Astronomical Telegrams
IAUC 6275: 1995bc; NEW X-RAY TRANSIENT REPEATER; N Cas 1995
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Circular No. 6275
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
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)
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVA 1995bc IN ANONYMOUS GALAXY
J. Mueller reports her discovery of a supernova (mag about
18.5) at R.A. = 9h51m43s.50, Decl. = +40o18'50".6 (equinox 2000.0),
which is 5".0 east and 14".2 north of the galaxy's center
(positions measured by Mueller and reductions performed by B. Skiff
and L. Wasserman, Lowell Observatory). The IIIa-J discovery plate
was taken on Dec. 1 UT at the 1.2-m Oschin Schmidt Telescope by
J. D. Mendenhall and Mueller in the course of the second Palomar
Sky Survey. No object appears at the supernova position on original
Sky Survey prints or on IIIa-F second Survey transparencies.
A. V. Filippenko and D. C. Leonard, University of California
at Berkeley, report that CCD spectra (range 420--700 nm, resolution
0.7 nm) obtained on Dec. 17 UT with the 3-m Shane reflector at Lick
Observatory show that SN 1995bc is a type-II supernova. There are
prominent, broad hydrogen Balmer lines having P-Cyg profiles. The
redshift of the parent galaxy, measured from narrow H-alpha and
[N II] lines, is about 0.048.
NEW X-RAY TRANSIENT REPEATER
K. Hurley, on behalf of the Ulysses Gamma-Ray Burst Team; C.
Kouveliotou, A. Harmon, G. Fishman, and M. Briggs, on behalf of the
BATSE/GRO team; J. van Paradijs, University of Amsterdam; and J.
Kommers and W. Lewin, Massachusetts Institute of Technology, report:
"A preliminary network synthesis position (cf. Hurley 1994, Ap.J.
431, L31) for the new repeating x-ray transient source (IAUC 6272)
has been obtained using Ulysses and BATSE (specifically, 59 BATSE
events from Dec. 2). The position is an annulus whose half-width
is 0.21 deg centered at R.A. = 2h44m37s, Decl. = -55o31'.0 (equinox
2000.0), with central radius 87.500 deg. Using the BATSE
occultation technique, we excluded a large area of the sky for the
source origin. The intersection of the network synthesis annulus
with the remaining (allowed) area of detection may be approximated
by a box with the following coordinates: R.A. = 17h50m, Decl. =
-28o.1; 17h49m, -28o.5; 17h23m, -30o.3; 17h19m, -31o.0."
NOVA CASSIOPEIAE 1995
Visual magnitude estimates: Nov. 25.79 UT, 8.4 (A. Pereira,
Cabo da Roca, Portugal); Dec. 3.99, 8.6 (P. Schmeer, Bischmisheim,
Germany); 9.75, 8.0 (Schmeer); 14.75, 7.4 (B. H. Granslo,
Fjellhamar, Norway); 15.74, 7.4 (A. Diepvens, Balen, Belgium);
16.74, 7.2 (E. Broens, Mol, Belgium).
1995 December 17 (6275) Daniel W. E. Green
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