Central Bureau for Astronomical Telegrams
IAUC 5135: 1990o; N IN M31; PSR 1737-30; Prob. DWARF N IN For
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Circular No. 5135
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
COMET SHOEMAKER-LEVY (1990o)
Carolyn and Eugene Shoemaker and David H. Levy report their
discovery with the Palomar 0.46-m Schmidt telescope of a comet
that has a strong central condensation. Positions measured by J.
Mueller and Levy:
1990 UT R.A. (1950) Decl. m1
Nov. 15.28975 1 48 50.34 - 0 25 36.7 13
16.27881 1 48 15.35 + 0 10 37.3
NOVA IN M31
J. Bryan, Georgetown, TX, reports his discovery of another nova
in M31, located at R.A. = 0h39m52s, Decl. = +40 55'.4 (equinox
1950.0), or 97" west and 261" south of the galaxy's center. Bryan
provides the following B magnitude estimates: Oct. 19.10 UT, [19.1;
24.12, 18.0; 25.27, 18.0; 28.16, 17.9; Nov. 10.30, 17.9; 12.07, 17.6.
A. V. Filippenko and J. C. Shields, University of California at
Berkeley, report: "A CCD spectrum (range 390-710 nm, resolution 1.2
nm), obtained on Nov. 11 UT with the Shane 3-m reflector at Lick
Observatory, reveals that Bryan's object is indeed a nova. Intense
hydrogen Balmer emission lines are present on a weak continuum, as
are fainter lines of Fe II (primarily multiplets 37, 38, 42, and 49).
He I lines are weak. The H-alpha and H-beta profiles are clearly
double-peaked, with a velocity splitting of about 900 km/s."
PSR 1737-30
D. Nice, Physics Department, Princeton University, writes: "A
glitch has occured in PSR 1737-30, with Delta(P)/P = -6.3 x 10E-7,
based on a pre-glitch period (P) of 0.606624631 s. The event took
place between Oct. 25 and Nov. 7, and was found as part of a pulsar-
monitoring program using a 26-m radio telescope at the National
Radio Astronomy Observatory, Green Bank. This pulsar has been
described by McKenna and Lyne (1990, Nature 343, 349) as glitching
more than once a year."
PROBABLE DWARF NOVA IN FORNAX
W. Liller, Vina del Mar, Chile, reports the following revised
V magnitudes of this object (cf. IAUC 5127): Oct. 27.28 UT, 12.2;
28.31, 12.2; 28.36, 12.9; 29.32, 12.9; 31.36, 12.9; Nov. 5.05, 13.0;
6.07, 13.1.
1990 November 16 (5135) Daniel W. E. Green
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