Central Bureau for Astronomical Telegrams
IAUC 4630: SNe; S Per; 3C 279
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 4631
Circular No. 4630
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
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
SUPERNOVAE
A. V. Filippenko and J. Schachter, University of California at
Berkeley, report: "Spectra (range 595-915 nm, resolution 1-1.5 nm)
of several recent supernova candidates were obtained on July 16-18
UT with a CCD spectrograph attached to the Shane 3-m reflector at
Lick Observatory. SN 1988L (cf. IAUC 4590, 4597, 4614) exhibits broad
emission lines of [O I] 630.0 nm, [Ca II] 730.0 nm, and the Ca II
infrared triplet, but no hydrogen, confirming its classification as
a type-Ib supernova. SN 1988N (cf. IAUC 4601), whose spectral type is
unknown, was not detected; it must now be fainter than mag 20. SN
1988P (cf. IAUC 4614) also was not detected, although narrow emission
lines from an H II region at its reported position were visible.
Either SN 1988P does not exist, or it lacks strong H-alpha emission and
is a probable type-I object. SN 1988Q (cf. IAUC 4623, 4625, 4626) shows
prominent H-alpha emission, confirming that it is a type-II supernova
1-2 months past maximum. The profile does not have a P-Cyg shape,
and the peak of the emission is blueshifted by about 3000 km/s with
respect to the superposed H II region."
S PERSEI
B. A. Skiff, Lowell Observatory, provides further Stromgren y
magnitude differences relative to HD 14415 (cf. IAUC 4577): Apr.
3.13 UT, +0.634; June 7.44, +0.211; June 9.44, +0.199; July 6.45,
-0.022; July 13.41, -0.073; July 15.43, -0.074. From a simple
comparison with two standard stars HD 14415 has V about 8.29.
International Ultraviolet Explorer observations of S Per are
scheduled and supporting optical and infrared spectra are
encouraged during the approaching bright maximum.
3C 279
M. T. Carini and H. R. Miller, Georgia State University, write:
CCD observations obtained with the Kitt Peak 0.9-m telescope on
June 3 indicate that 3C 279 remains in a bright state with V = 14.6.
However, when these observations are compared with those reported
on IAUC 4598, it suggests that this source may now be declining
in brightness. Additional observations of this source are encouraged."
1988 July 19 (4630) Daniel W. E. Green
Read IAUC 4631
Our Web policy. Index to the CBAT/MPC/ICQ pages.
