Central Bureau for Astronomical Telegrams
IAUC 7782: 2001is; 2001it; 2000cl
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Circular No. 7782
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2001is IN NGC 1961
Y. L. Qiu and J. Y. Hu, Beijing Astronomical Observatory (BAO),
report the discovery by the BAO Supernova Survey of an apparent
supernova (mag about 17.6) in unfiltered images taken with the BAO
0.6-m telescope on Dec. 22.56 and 23.73 UT; the new object appeared
at mag 17.9 on Dec. 26.53. SN 2001is is located at R.A. =
5h42m09s.07, Decl. = +69o21'54".8 (equinox 2000.0), which is 23".2
east and 48".2 south of the nucleus of NGC 1961. An image taken
with the same telescope on Dec. 14 showed no star at the position
of the new object (limiting mag about 18.5). SN 2001is was
apparently detected independently by LOTOSS (cf. IAUC 7514), as
reported by M. Papenkova (University of California, Berkeley) and
M. Schwartz (Cottage Grove, OR), at the following unfiltered CCD
magnitudes: 1998 Sept. 17.5, [19.0: (KAIT); 2001 Dec. 24.3, about
18.0 (KAIT); 26.4, about 18.0 (Tenagra III 0.5-m telescope).
Schwartz provides position end figures 09s.16, 55".3, or 25".4
east and 49".8 south of the nucleus of NGC 1961.
SUPERNOVA 2001it IN MCG +09-25-15
G. M. Hurst, Basingstoke, England, reports the discovery by T.
Boles, Coddenham, England, of an apparent supernova (mag 17.6) on
an unfiltered CCD image (limiting mag 18.5) taken on Dec. 22.196
UT. The new object is located at R.A. = 15h06m09s.40, Decl. =
+53o24'41".6 (equinox 2000.0; average of two frames from Dec. 22
and 26), which is 7" west and 3" north of the nucleus of MCG
+09-25-15. A follow-up image taken on Dec. 26.130, obtained in
good conditions (limiting mag 19.0), clearly shows the object at
mag 17.4. A master image taken on Sept. 16 by Boles does not show
SN 2001it to a limit of mag about 18.
SUPERNOVA 2000cl IN NGC 3318
R. A. Stathakis, Anglo-Australian Observatory, reports that he
and J. Stevenson obtained a spectrum (range 300-900 nm) of SN
2000cl (IAUC 7432) on Dec. 18 (570 days after discovery) with the
Anglo-Australian Telescope. The spectrum clearly that of a type-
IIn supernova (rather than the original classification of type II)
and resembles that of SN 1988Z at a similar epoch (Turatto et al.
1993, MNRAS 262, 128). The night was cloudy, but the object
appeared to be of similar brightness to that at discovery (mag 14.8)
via the unfiltered CCD. Further observations are encouraged,
especially at other wavelengths.
(C) Copyright 2001 CBAT
2001 December 27 (7782) Daniel W. E. Green
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