Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8422: Poss. N LMC; 2004ex, 2004fc

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 8421 SEARCH Read IAUC 8423

View IAUC 8422 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 8422
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)


POSSIBLE NOVA IN THE LARGE MAGELLANIC CLOUD
     W. Liller, Vina del Mar, Chile, reports his discovery of a
possible nova (V approximately 10.8) near the position of the
presumed 1937 nova YY Dor (without providing a measured position
for the new object) on two unfiltered Technical Pan photographs
taken on Oct. 20.193 UT; nothing was present at this location on
his 0.2-m Schmidt camera photos taken on Oct. 17.181.  A visual
magnitude estimate by A. Pearce (Nedlands, W. Australia) on Oct.
21.576 gave 12.0.  L. A. G. Monard, Pretoria, South Africa, reports
that a CCD image taken on Oct. 21.88 shows a star of mag V about
12.0 located at R.A. = 5h56m41s.84, Decl. = -68o54'37".1 (equinox
2000.0), adding that a USNO-A2.0 star with blue mag 18.8 and red
mag 17.8 has position end figures 42s.38, 34".3.  This appears to
be some distance from YY Dor [cf. IBVS 1248, which cited
Hoffmeister 1949, Astron. Abhandl. 12(1), A24], for which an
accurate position is not available (the high precision given by
Subramaniam and Anupama 2001, A.Ap. 449, 451, seems unwarranted).
Henize et al. (1954, Proc. Nat. Acad. Sci. 40, 368) gave R.A. =
5h57m.0, Decl. = -68o55' (equinox 2000.0, precessed from the
original 1900.0 coordinates; earlier raw X,Y plate coordinates
provided by McKibben 1941, Harv. Bull. 915) from Harvard/Boyden
plates for the 1937 nova, and Hoffmeister gave R.A. = 5h57m30s,
Decl. = -68o55'.1 (equinox 2000.0; precessed from the original
1875.0 coordinates) from Windhoek plates.


SUPERNOVAE 2004ex AND 2004fc
     Further to IAUC 8412, K. Shimasaki and W. Li report the LOSS
discovery of an apparent supernova on unfiltered KAIT images taken
on Oct. 21.39 (mag about 15.5) and 22.40 UT (mag about 15.4).  SN
2004fc is located at R.A. = 1h51m03s.85, Decl. = -9o42'06".9
(equinox 2000.0), which is about 2" east and 2" north of the
diffuse nucleus of NGC 701.  A KAIT image taken on Oct. 14.39
(limiting mag about 19.0) showed nothing at this position.  H.
Yamaoka, Kyushu University, reports the following prediscovery
unfiltered CCD magnitudes of SN 2004fc by K. Itagaki (Teppo-cho,
Yamagata, Japan, 0.60-m reflector):  Oct. 16.624, 15.4; 17.577,
15.4; it was not detected on an image taken on Oct. 6.718 (limiting
magnitude difficult to estimate due to proximity to host-galaxy
nucleus).
     An independent discovery of SN 2004ex (cf. IAUC 8418, 8420)
was made by Shimasaki and Li, with the following approximate
unfiltered CCD magnitudes available:  Oct. 6.35, [20.0; 10.33,
[19.0; 14.33, 18.6.

                      (C) Copyright 2004 CBAT
2004 October 22                (8422)            Daniel W. E. Green

Read IAUC 8421 SEARCH Read IAUC 8423

View IAUC 8422 in .dvi or .ps format.

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

Valid HTML 4.01!