Central Bureau for Astronomical Telegrams
IAUC 4905: 1989T; PULSAR IN DIRECTION OF NGC 6440; QV Vul
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Circular No. 4905
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
SUPERNOVA 1989T IN ANONYMOUS GALAXY
Christian Pollas, Observatoire de la Cote d'Azur, reports his
discovery of an apparent supernova in an anonymous galaxy of mag 18
located at R.A. = 1h44m28s.47, Decl. = +1 44'26.6 (equinox 1950.0).
The supernova, at mag 20 on Oct. 26.97 and 30.96 UT (TP 15301 emulsion),
is at R.A. = 1h44m28s.08, Decl. = +1 44'31.2. There are two very
faint apparent H II regions near the new object, and there is a nearby
star at R.A. = 1h44m29s.17, Decl. = +1 42'23.5.
PULSAR IN DIRECTION OF NGC 6440
R. N. Manchester, Australia Telescope National Facility,
CSIRO; A. G. Lyne and S. Johnston, Jodrell Bank, University of
Manchester; N. D'Amico, University of Palermo: J. Lim,
MacQuarie University; D. A. Kniffen, Goddard Space Flight Center;
A. S. Fruchter, Carnegie Institution of Washington; and W. M.
Goss, Very Large Array, National Radio Astronomy Observatory,
telex: "We have discovered a pulsar in the direction of the globular
cluster NGC 6440. Following the detection at the VLA by
Fruchter and Goss of a steep-spectrum source located within
10" of the cluster center and having a 20-cm flux density
of 1.3 mJy, a pulsar was detected in 20-cm observations made with
the Parkes radiotelescope on Nov. 7 and confirmed in observations
made the next day with the same system. It was also detected in
analysis of 50-cm observations made in July. The heliocentric
pulse period is 288.60 ms and the dispersion measure is 210 +/- 20
pc/cmE3. There is no evidence for any binary motion. The 20-cm
mean flux density of the pulsar is equal to the VLA source flux
density within the uncertainties. The similarity of the flux
densities and the steep spectrum of the VLA source suggest
identification of the pulsar with this source and hence that the
pulsar is located within the globular cluster."
QV VULPECULAE
Visual magnitude estimates (cf. IAUC 4818): July 26.87 UT, 14.0
(A. Boattini, Florence, Italy); Aug. 20.87, 13.9 (R. Monella, Covo,
Italy); Sept. 3.93, 14.1 (S. Korth, Duesseldorf, W. Germany); 27.90,
14.2 (P. Schmeer, Bischmisheim, W. Germany); Oct. 4.90, 14.0 (A.
Mizser, Budapest, Hungary); 17.78, 13.8 (M. Verdenet, Bourbon-Lancy,
France); 26.74, 14.0 (E. Schweitzer, Strasbourg, France); Nov. 14.73,
[14.5 (Boattini).
1989 November 15 (4905) Daniel W. E. Green
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