Central Bureau for Astronomical Telegrams
IAUC 7696: 2001dz; 2001ea; V4739 Sgr
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Circular No. 7696
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 2001dz IN UGC 471
G. M. Hurst, Basingstoke, England, reports the discovery by T.
Boles (Coddenham, England) of an apparent supernova (mag 18.3) on
eight unfiltered CCD frames (limiting mag 19.0-19.5) secured
between Aug. 27.970 and 28.125 UT for the U.K. Nova/Supernova
Patrol with a 0.36-m Schmidt-Cassegrain telescope. The new object
is located at R.A. = 0h44m43s.15, Decl. = +45o25'10".4 (equinox
2000.0), which is 13" east and 6" west of the center of UGC 471.
In response to an appeal from the discoverer, M. Armstrong
(Rolvenden, England) also imaged SN 2001dz on Aug. 28.031, and
Boles found the star at mag 18.0 on another image taken on Aug.
28.940 (which produced position end figures 43s.11, 10".6). SN
2001dz was absent from a master image taken by Boles on July 25
(limiting mag 19.0), and it is not present on second Palomar Sky
Survey blue and red images from 1989.
SUPERNOVA 2001ea IN MCG +05-54-38
B. A. Beutler and W. D. Li, University of California at
Berkeley, report the discovery by LOTOSS (cf. IAUC 7514) of an
apparent supernova (mag about 18.2) in unfiltered images taken with
the Katzman Automatic Imaging Telescope (KAIT) on Aug. 28.4 and
29.4 UT. The new object is located at R.A. = 23h08m04s.68, Decl. =
+28o34'06".1 (equinox 2000.0), which is 10".3 east and 4".2 south
of the nucleus of MCG +05-54-38. A KAIT image taken on Aug. 19.4
showed nothing at this position (limiting mag about 19.0).
V4739 SAGITTARII
K. Vanlandingham, Columbia University; R. M. Wagner, LBT
Observatory; and S. G. Starrfield, Arizona State University, write:
"An optical spectrum (range 325-900 nm; resolution 0.8 nm) was
obtained of V4739 Sgr on Aug. 28.15 UT with the 2.4-m Hiltner
telescope (+ CCDS spectrograph) of the MDM Observatory on Kitt
Peak. The spectrum exhibits very broad emission lines of the
Balmer series of hydrogen, He I, N II 568-nm, the C III/N III
blend at 464-465 nm, and O I 777.4- and 844.6-nm superposed on a
reddened continuum. Interstellar absorptions, particularly Na D at
589.3 nm, are prominent, suggesting that the object is moderately
to heavily reddened. The FWZI and FWHM of H-alpha emission are
8044 and 5510 km/s, respectively, implying a mean expansion
velocity of about 2750 km/s. The equivalent widths of H-alpha and
H-beta emission are 24 and 16 nm, respectively. The spectrum is
typical of a He/N-class nova early in its evolution."
(C) Copyright 2001 CBAT
2001 August 29 (7696) Daniel W. E. Green
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