Central Bureau for Astronomical Telegrams

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IAUC 7154: 1999bx; N Sgr 1999; 1999an

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                                                  Circular No. 7154
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 1999bx IN UGC 11391
     A. Friedman and W. Li, University of California at Berkeley,
on behalf of the Lick Observatory Supernova Search (cf. IAUC 6627,
7126), reports the discovery with the 0.8-m Katzman Automatic
Imaging Telescope (KAIT) of an apparent supernova in UGC 11391.  SN
1999bx was discovered on an unfiltered image taken on Apr. 26.5 UT
(mag about 16.5) and confirmed on Apr. 27.5 under poor seeing
conditions.  The new star is located at R.A. = 19h01m41s.44, Decl.
= +40o44'52".3 (equinox 2000.0).  The host galaxy, UGC 11391, has a
peculiar appearance (two nuclei) and may be an interacting galaxy
pair.  The supernova is sitting in the middle of the western ridge
that connects the two nuclei, and is about 2".2 west and 14".9
north of the southern nucleus.  KAIT images of the same field on
1998 Sept. 22.1 (limiting mag about 19.5) showed nothing at the
position of SN 1999bx.


NOVA SAGITTARII 1999
     P. Garnavich, Harvard-Smithsonian Center for Astrophysics,
reports that spectra of N Sgr 1999 obtained by E. Howell
(University of Puerto Rico) and A. Soderberg (Bates College) with
the McDonald Observatory 2.1-m telescope on Apr. 27.5 UT show
H-alpha with a clear P-Cyg profile.  The emission has a width of
800 km/s (FWHM) and the deep absorption feature has an equivalent
width (EW) of 0.7 nm, blueshifted by 1200 km/s.  H-beta is observed
in absorption with only a small emission peak.  Permitted Fe II
absorption lines of multiplet 42 are seen at 490.97, 500.39, and
515.41 nm, and strong Na I absorption is also visible with EW = 0.4
nm.  The spectrum is consistent with a nova near or before maximum
light.
     W. Liller, Vina del Mar, Chile, revises his magnitude given on
IAUC 7153 (line 16) to V = 7.95.  He adds that his previous
photograph of the same region, taken with a 85-mm camera lens (+
Tech Pan film + orange filter) on Apr. 21.24 UT, shows no star
brighter than V = 11.5 at the position of the new nova.   Magnitude
estimates via E. O. Waagen, AAVSO:  Apr. 27.333 UT, 7.8 (C. Scovil,
Stamford, CT, visual); 27.364, V about 7.18 (R. Zissel, South
Hadley, MA, CCD).


SUPERNOVA 1999an IN IC 755
     Precise CCD position by K. Sarneczky, L. Kiss, and B. Csak for
SN 1999an (cf. IAUC 7124), obtained at Konkoly Observatory's
Piszkesteto station on Mar. 19.962 UT:  R.A. = 12h01m10s.57, Decl.
= +14o06'12".3 (equinox 2000.0), which is 1".8 east and 3".1 south
of the center of IC 755.

                      (C) Copyright 1999 CBAT
1999 April 27                  (7154)            Daniel W. E. Green

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