Central Bureau for Astronomical Telegrams
IAUC 4977: 1990E; NEW DISTANT EXTRAGALACTIC OH MEGAMASERS; 1989c1
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Read IAUC 4978
Circular No. 4977
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 1990E IN NGC 1035
S. Benetti, E. Cappellaro, and M. Turatto, Asiago Astrophysical
Observatory, communicate: "We observed SN 1990E with the 1.82-m
Cima Ekar telescope. A CCD spectrum, obtained on Mar. 1.75 UT,
is dominated by the P-Cyg profile of H-alpha, with broad emission
(FWHM 12 000 km/s) at 654.6 nm and weaker absorption at 634.3 nm.
Other broad emissions are centered at 483.0 and 504.0 nm. The
heliocentric recession velocity at the location of the supernova,
1150 km/s, was measured from the narrow emission lines of the
underlying H II region. CCD photometry provided the following
magnitudes: Feb. 23.76, R = 15.10; Feb. 23.77, V = 15.70. The
offset from the galaxy nucleus, measured on the two frames, is 3".0
west and 9".4 south."
NEW DISTANT EXTRAGALACTIC OH MEGAMASERS
L. Bottinelli, L. Gouguenheim, and A. M. Le Squeren,
Observatoire de Paris, Section de Meudon; M. Dennefeld, Institut
d'Astrophysique de Paris; J. M. Martin, European Southern
Observatory; and G. Paturel, Observatoire de Lyon, report:
"Six new distant extragalactic OH megamasers have been
discovered with the Nancay radiotelescope in the following
IRAS sources: 00335-2732, 00509+1225, 03056+2034, 10485-1447,
16145+4231, and 23365+3604. Their far-infrared luminosities are
respectively 84, 63, 15, 188, 84, and 118 x 10E10 in solar units,
and their OH 1667-MHz isotropic luminosities are 360, 58, 19,
770, 1080, and 275 in solar units for the derived distances
268, 235, 108, 500, 375, and 248 Mpc."
COMET AUSTIN (1989c1)
Z. Sekanina, Jet Propulsion Laboratory, California Institute of
Technology, writes: "The orientation and extent of the dust tail
on Feb. 25-26 and Mar. 2, as communicated respectively by West (IAUC
4970) and by Gilmore (IAUC 4975), are diagnostic of submillimeter-
size and larger particles released between about 900 and 500 days
before perihelion, when the comet was at heliocentric distances
between 10 and 7 AU. Early tail formation of this kind is
characteristic of new, Oort-cloud comets. Predicted position angles
for this tail: Mar. 10, 158 deg; 20, 157 deg; 30, 150 deg; Apr. 9,
124 deg; 19, 85 deg; 29, 60 deg; May 9, 42 deg; 19, 24 deg; 29,
358 deg; June 8, 333 deg; 18, 327 deg."
1990 March 8 (4977) Daniel W. E. Green
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