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IAUC 8006: 2002hi; 2002hj; V4744 Sgr

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                                                  Circular No. 8006
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     W. Li, University of California at Berkeley (UCB), reports the
discovery by LOTOSS (cf. IAUC 7906) of an apparent supernova (mag
about 17.9) on unfiltered KAIT images taken on Oct. 21.5 and 31.5
UT.  SN 2002hi is located at R.A. = 7h19m54s.08, Decl. =
+17o58'18".2 (equinox 2000.0), which is within 1".0 of the nucleus
of a diffuse faint galaxy.  A KAIT image taken on Mar. 30.2 UT
showed nothing at this position (limiting mag about 19.0).
     R. Chornock, S. Jha, and A. V. Filippenko, UCB; and B. Barris,
University of Hawaii, write that a spectrum (range 400-1000 nm),
obtained on Nov. 1.6 UT with the Keck II 10-m telescope (+ ESI),
shows that SN 2002hi is a type-IIn supernova, with strong H-alpha
emission having very broad (FWHM about 13000 km/s) and
intermediate-width (FWHM about 2000 km/s) components.  The very
broad component is also visible in the He I 587.6-nm emission line.
Intermediate-width emission similar to that of Wolf-Rayet stars is
present at a rest wavelength of about 465 nm, unusual even among
type-IIn supernovae.  Aside from the Wolf-Rayet lines, the spectrum
is similar to that of SN 1988Z at early times (Filippenko 1997,
ARAA 35, 309, and references therein).  Accordingly, the object
might become quite luminous at radio and x-ray wavelengths, because
of interaction of the ejecta with dense circumstellar gas.  The
host-galaxy redshift derived from narrow [N II] 658.3-nm emission
is 0.061.

     Further to IAUC 7999, W. M. Wood-Vasey, G. Aldering, P.
Nugent, and K. Li report the discovery of an apparent supernova
(mag 17.4) on unfiltered NEAT images taken with the Haleakala 1.2-m
telescope on Oct. 20.48, 20.49, and 20.50 UT.  Confirming images
were taken with the Palomar 1.2-m telescope on Oct. 29.40, 29.43,
and 29.46 (mag 17.4).  The new object is located at R.A. =
2h58m09s.34, Decl. = +4 41'03".8 (equinox 2000.0) which is 2".0
west and 6".5 south of the center of the apparent host galaxy.  No
point source is visible at this location in NEAT Palomar images
taken on Oct. 9 (limiting mag 19.5 at S/N = 10).

     Precise position measured by H. Yamaoka, Kyushu University,
from images taken by S. Kiyota and by P. Nelson:  R.A. =
17h47m21s.724 +/- 0s.003, Decl. = -23o28'22".79 +/- 0".06 (equinox
2000.0; 60-70 UCAC1 reference stars).

                      (C) Copyright 2002 CBAT
2002 November 2                (8006)            Daniel W. E. Green

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