Central Bureau for Astronomical Telegrams
IAUC 4382: 1987E; 1987A; T Leo; 1987B
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Circular No. 4382
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
SUPERNOVA 1987E IN NGC 4725?
P. Wild, Astronomical Institute, University of Berne, reports
the existence of a foreground star, with a proper motion of 0".13/yr
in p.a. 285 deg, at the given position of this object (IAUC 4373); he
detects no unusual brightening in this object (mag about 16).
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
M. Karovska, P. Nisenson, R. Noyes, and C. Papaliolios, Center
for Astrophysics, write: "High-angular-resolution speckle observations
of SN 1987A on Mar. 25 and Apr. 2 using the Cerro Tololo
Interamerican Observatory 4-m telescope (with the CfA PAPA photon-
counting detector) show a bright feature with a separation of 0".057
+/- 0".014 at p.a. 194 deg +/- 5 deg relative to the SN. This feature appears
to be 2.7 +/- 0.2 mag fainter than the SN in a 10-nm bandpass centered
on 656.3 nm (H-alpha). A corresponding feature was detected in a
10-nm bandpass centered at 533 nm, though it appears to be somewhat
fainter than in H-alpha. Preliminary analysis of data recorded in a 10-
nm bandpass centered at 450 nm shows no evidence of an object
within a 4-mag difference from the SN. Data from nearby comparison
stars, recorded close in time using the same filters, produced
clean, point-like images with no structure above the noise at the
separation and position angle of the observed feature."
Corrigendum. On IAUC 4370, lines 7-15, for mm read microns
Visual magnitude estimates: Apr. 28.51 UT, 3.0 (R. McNaught,
Siding Spring Observatory); 29.38, 3.0 (D. A. J. Seargent, The
Entrance, N.S.W.); 30.43, 2.9 (McNaught).
T LEONIS
This star has had another outburst, as shown by the following
visual magnitude estimates (reported via G. M. Hurst, Basingstoke,
England, and J. Mattei, AAVSO): Apr. 28.89 UT, [13.7: (S. Lubbock,
Bridgend, Wales); May 1.12, 10.5 (G. Dyck, N. Dartmouth, MA); 1.90,
11.2 (Lubbock); 2.08, 11.8 (P. Dombrowski, Glastonbury, CT).
SUPERNOVA 1987B IN NGC 5850
Corrigendum: On IAUC 4370, the three observations by J. Griese
are to be deleted.
1987 May 4 (4382) Daniel W. E. Green
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