Central Bureau for Astronomical Telegrams
IAUC 5564: 1992ai, 1992aj; NOTICE RE Tlgms; N Sgr 1992 No. 2; N Sco 1992
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Circular No. 5564
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)
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MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
SUPERNOVAE 1992ai AND 1992aj IN ANONYMOUS GALAXIES
J. Maza, University of Chile; and M. Hamuy, Cerro Tololo
Interamerican Observatory, report the discoveries of two apparent
supernovae on 20-min unfiltered IIa-O plates taken by M.
Wischnjewsky (University of Chile) with the CTIO Curtis Schmidt
telescope. SN 1992ai, found by R. Antezana, was at mpg about 17.5
on a plate taken July 5.420 UT, and is located about 2".5 west and
7" south of the nucleus of a spiral galaxy at R.A. = 1h26m50s.4,
Decl. = -32 31'52" (equinox 1950.0). SN 1992aj, found by
Wischnjewsky, was at mpg about 17 on a plate taken July 5.3, and is
located about 9" east and 5" north of the nucleus of a spiral
galaxy at R.A. = 23h45m12s.5, Decl. = -35 28'39". Confirmation of
both supernovae was made by R. Aviles (CTIO) and F. Barrientos
(University of Chile) with V CCD images obtained on July 14 and 15
with the 1-m telescope at Las Campanas Observatory. Neither star
appears on European Southern Observatory Sky Survey photographs.
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NOVA SAGITTARII 1992 No. 2
Unfiltered CCD magnitudes (uncertainty about 0.05 mag) by W.
Liller, Vina del Mar, Chile: July 12.01 UT, 8.30; 13.02, 8.13;
13.99, 8.34.
Further visual magnitude estimates: July 11.55 UT, 7.7 (F.
Farrell, Adelaide, S. Australia); 14.58, 8.0 (Farrell); 16.46, 8.5
(P. Camilleri, Cobram, Victoria, Australia).
NOVA SCORPII 1992
Liller also reports further unfiltered CCD magnitudes of this
object (cf. IAUC 5550): July 8.12 UT, 8.34; 9.11, 8.48 (through
clouds); 12.00, 8.08; 13.01, 7.91; 13.98, 7.80.
1992 July 17 (5564) Daniel W. E. Green
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