Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7770: 2001ic; 2001id; 2001hg; 2001hh

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 7769 SEARCH Read IAUC 7771

View IAUC 7770 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7770
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 2001ic IN NGC 7503
     W. D. Li, University of California at Berkeley, reports the
discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova (mag
about 17.4) in an unfiltered image taken with the Katzman Automatic
Imaging Telescope (KAIT) on Dec. 7.2 UT.  The new object is
confirmed at about the same brightness on an image taken by M.
Schwartz with the Tenagra III 0.5-m telescope on Dec. 8.2 under
poor conditions.  SN 2001ic is located at R.A. = 23h10m43s.34,
Decl. = +7 34'10".4 (equinox 2000.0), which is 14".8 east and 6".4
north of the nucleus of NGC 7503.  A KAIT image taken on Nov. 15.2
showed nothing at this position (limiting mag about 19.0).


SUPERNOVA 2001id IN UGC 12424
     Li also reports the discovery by LOTOSS of another apparent
supernova (mag about 18.8) in unfiltered KAIT images taken on Dec.
7.2 and 9.2 UT.  The new object is located at R.A. = 23h13m10s.88,
Decl. = +10o46'25".2 (equinox 2000.0), which is 5".7 west and 5".6
south of the nucleus of UGC 12424.  A KAIT image taken on Nov. 6.2
showed nothing at this position (limiting magnitude about 19.5).


SUPERNOVA 2001hg IN NGC 4162
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum (range
370-750 nm) of SN 2001hg (cf. IAUC 7766), obtained by E. Falco on
Dec. 7.53 UT with the F. L. Whipple Observatory 1.5-m telescope (+
FAST spectrograph), shows it to be a type-II supernova before
maximum light.  The spectrum consists of a very blue continuum with
incipient P-Cyg lines of hydrogen and helium.


SUPERNOVA 2001hh IN MCG -02-57-22
     Matheson et al. also report that spectra of SN 2001hh (cf.
IAUC 7766), obtained by Falco as above on Dec. 7.04 UT and by
Kirshner and Jha on Dec. 7.04 with the Baade 6.5-m telescope at Las
Campanas (+ LDSS-2 spectrograph; range 370-1000 nm), show it to be
a type-II supernova soon after maximum light.  Adopting the
NASA/IPAC Extragalactic Database recession velocity of 7445 km/s
for the host galaxy, the expansion velocity derived from the
minimum of the H-beta line is 10 000 km/s.  Images obtained by
Kirshner and Jha on Dec. 6.05 with the Baade 6.5-m telescope yield
magnitudes R about 17.8 and I about 17.6.

                      (C) Copyright 2001 CBAT
2001 December 9                (7770)            Daniel W. E. Green

Read IAUC 7769 SEARCH Read IAUC 7771

View IAUC 7770 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!