Central Bureau for Astronomical Telegrams
IAUC 7185: 1999cl; V382 Vel; 1998S, 1999Z, 1999aa, 1999ac, 1999an, 1999be
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Circular No. 7185
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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SUPERNOVA 1999cl IN NGC 4501
M. Papenkova, A. V. Filippenko, and R. R. Treffers, University
of California at Berkeley, on behalf of the Lick Observatory
Supernova Search (cf. IAUC 6627, 7126), report their discovery of
an apparent supernova in an unfiltered image taken on May 29 UT
(mag 16.4) with the 0.8-m Katzman Automatic Imaging Telescope
(KAIT). The object was confirmed in images taken on May 30 and 31
(mag 16.2 and 15.3, respectively). Images from May 21 and 22 do
not show the object, to a limiting magnitude of 18.6. The
supernova candidate is at R.A. = 12h31m55s.9, Decl. = +14o25'33"
(equinox 2000.0), which is about 46" west and 23" north of the
nucleus of NGC 4501.
V382 VELORUM
J. E. Steiner and R. Campos, Laboratorio Nacional de
Astrofisica (LNA), CNPq; and D. Cieslinski, Instituto Nacional de
Pesquisas Espaciais, write: "We observed V382 Vel with the LNA
1.6-m telescope (+ Coude spectrograph) on May 24. Three exposures
were taken, centered at H-alpha, H-beta, and Ca II H and K. The
spectrum shows very strong Fe II emission lines at 492.4 and 501.9
nm (multiplet 42) with about half the intensity of H-beta. H-alpha
presents an equivalent width of -26.3 nm, FWHM of 2390 km/s, and
FWZI of 6800 km/s. The interstellar Ca II K line has an equivalent
width of 0.024 nm. The derived distance is 800 pc. Assuming a
reddening of A_v = 0.8 mag, the absolute magnitude at maximum light
is M_v = -7.7. We classify the nova as of 'Fe II' type in the
Williams classification system. With the observed ejection
velocity, it is likely to be a neon nova. If the pre-outburst
magnitude is 16.4 (IAUC 7177), the amplitude of the eruption is
13.8 and the pre-outburst absolute magnitude is M_v = +6.1."
J. Garcia, San Rafael, Mendoza, Argentina, reports that he
visually scanned the region surrounding this nova with a telescope
in the course of his observation of FW Vel on May 21.083 UT, and he
saw nothing unusual in the vicinity of the nova to an estimated
magnitude of 10.5.
SUPERNOVAE 1998S, 1999Z, 1999aa, 1999ac, 1999an, 1999be
R. Szabo reports CCD R magnitude estimates of various
supernovae using the 1-m telescope at Piszkesteto, Hungary (based
on USNO-A1.0 R magnitudes): SN 1998S, May 25.978 UT, 18.4; SN
1999Z, May 25.916, 16.8; SN 1999aa, May 24.820, 18.2; SN 1999ac,
May 20.977, 16.1; SN 1999an, May 25.987, 16.5; SN 1999be, May
21.819, 17.8.
(C) Copyright 1999 CBAT
1999 June 2 (7185) Daniel W. E. Green
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