Central Bureau for Astronomical Telegrams
IAUC 8800: V1065 Cen = N Cen 2007
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Circular No. 8800
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)
V1065 CENTAURI = NOVA CENTAURI 2007
W. Liller, Vina del Mar, Chile, reports his discovery of a
possible nova (mag approximately 8.2) located at R.A. = 11h43m.2,
Decl. = -58o03' (equinox 2000.0), appearing on two Technical Pan
films taken near Jan. 23.354 UT with an 85-mm-focal-length camera
lens and an orange filter. Nothing brighter than magnitude 11.5
was seen at this position on exposures from Jan. 15.36. Nothing is
seen at this position on the "Real Sky Digitized Southern Sky
Survey", encompassing images made with the 1.2-m Schmidt telescope
at Siding Spring (limiting magnitude presumed to be 19 or fainter).
B. Heathcote (Australia) reports the following precise position for
the new star from CCD images obtained on Jan. 25.708: R.A. =
11h43m10s.33, Decl. = -58o04'04".3 (equinox 2000.0), with
magnitudes B = 9.08 and V = 8.59. A low-resolution spectrum by
Heathcote shows strong H_alpha emission. P. Schmeer (Germany)
reports that this position is very close to a star of red mag 18.4
in the USNO-B1.0 catalogue with position end figures 10s.24, 04".5
and of red mag 17.1 in the Guide-Star Catalogue with position end
figures 10s.231, 03".85; the 2MASS catalogue contains an object at
position end figures 10s.12, 04".1 (with magnitudes J = 16.6, K =
15.1). E. O. Waagen, AAVSO, forwards a report from P. Nelson
(Australia) that gives the same position as Heathcote (presumably
re-measured) from a V-band CCD image obtained on Jan. 25.656 (with
the new variable star at V = 8.5). Waagen also provides position
end figures 10s.34, 04".2 forwarded from C. Stockdale (Victoria,
Australia) from an image taken on Jan. 25.611 (the magnitude
measured as V = 8.7). Visual magnitude esimates: Jan. 25.031, 8.7
(A. Amorim, Florianopolis, Brazil); 25.529, 8.3 (A. Pearce,
Nedlands, W. Australia).
F. M. Walter, Department of Physics and Astronomy, Stony Brook
University, writes that red and blue spectra, obtained on Jan. 26.3
UT with the SMARTS 1.5-m telescope at Cerro Tololo, shows the new
variable to be a classical nova near maximum. The H_alpha line has
an equivalent with of about 93.0 nm and a FWHM of 6.0 nm. There is
a possible wind absorption feature at -2550 km/s (650.7 nm), and
there seems to be P-Cyg structure near the Na D lines. The blue
spectrum is highly structured; H_gamma and H_delta are in emission
with wind absorption at about -2000 km/s, but there is still an
optically-thick photosphere.
N. N. Samus, Institute of Astronomy, Russian Academy of
Sciences, reports that this nova has been given the designation
V1065 Cen.
(C) Copyright 2007 CBAT
2007 January 26 (8800) Daniel W. E. Green
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