Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7699: 2001do; 2001dk, 2001dq, 2001ds; V1178 Sco; 2001dz

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 7698 SEARCH Read IAUC 7700

View IAUC 7699 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7699
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 2001do IN UGC 11459
     R. Chornock, M. Modjaz, and A. V. Filippenko, University of
California at Berkeley (UCB), report that inspection of CCD spectra
(range 330-1000 nm), obtained on Aug. 23 UT with the Shane 3-m
reflector at Lick Observatory, reveals that SN 2001do (IAUC 7682)
is an unusual supernova of type II.  The spectrum exhibits low-
contrast absorption and emission features of H, Fe, and Na
superimposed on a smooth continuum with a color temperature of
about 5800 K.


SUPERNOVAE 2001dk, 2001dq, 2001ds
     Chornock et al. report that inspection of CCD spectra,
obtained as above, reveals that SN 2001dk (IAUC 7675, 7676) is a
normal type II-P supernova, a few weeks past maximum light.  Well-
developed P-Cyg lines of H, Fe, Sc, and Ca are present.  The
expansion velocity measured from the H-alpha absorption is 9000
km/s.  Additional spectra show that SN 2001ds (IAUC 7684) and SN
2001dq (IAUC 7683) are supernovae, probably of type Ia (about 3
weeks past maximum brightness) and type Ic, respectively.


V1178 SCORPII
     D. K. Lynch and R. J. Rudy, The Aerospace Corporation; and
J. C. Wilson, Cornell University, report 0.8-2.5-micron
spectrophotometry of V1178 Sco (= N Sco 2001) using the Palomar
1.5-m telescope (+ CorMASS near-infrared spectrograph) on July
30.16 UT, about 40 days after peak brightness (June 20):  "The
object has formed large amounts of dust in the 19 days between
observations (see IAUC 7679).  It has faded by over 4 magnitudes in
the J band (1.25 microns), and its spectrum shows evidence of both
heavy reddening and significant thermal emission beyond 2 microns.
Based on our spectra and the light curve, it appears as though dust
formation may have begun around July 10, about 3 weeks after peak
brightness.  Magnitudes derived from the spectrophotometry:  July
11, J = 9.2, H [1.65 microns] = 8.11, K(short) [2.16 microns] =
6.8; July 30, 13.3, 10.6, 8.4."


SUPERNOVA 2001dz IN UGC 471
     Corrigendum.  On IAUC 7696, lines 6-7, the offset should read
13" east and 7" south of the center of UGC 471.

                      (C) Copyright 2001 CBAT
2001 August 29                 (7699)            Daniel W. E. Green

Read IAUC 7698 SEARCH Read IAUC 7700

View IAUC 7699 in .dvi or .ps format.

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

Valid HTML 4.01!