Central Bureau for Astronomical Telegrams
IAUC 9265: V1369 Cen = N CEN 2013 = PNV J13544700-5909080; C/2013 R1
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Circular No. 9265
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
CBATIAU@EPS.HARVARD.EDU ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
V1369 CENTAURI = NOVA CEN 2013 = PNV J13544700-5909080
John Seach, Chatsworth Island, NSW, Australia, reports his
discovery of an apparent nova (mag 5.5) in six CCD images obtained
with a digital SLR camera (+ 50-mm-f.l. lens; limiting mag 11)
taken on Dec. 2.692 UT; he provided the position of the variable as
R.A. = 13h54m47s, Decl. = -59o09'08" (equinox 2000.0); nothing was
visible at this position on an image taken by Seach on Nov. 26.69
UT (limiting mag 11). The variable was designated PNV
J13544700-5909080 when it was posted at the Central Bureau's TOCP
webpage. Unfiltered CCD images of the variable obtained by E.
Guido, N. Howes, and M. Nicolini with a 0.50-m astrograph at Siding
Spring on Dec. 3.68 yield position end figures 45s.22, 04".5; they
note that a star with blue mag 15.5 and red mag 15.1 has position
end figures 45s.37, 03".5. K. Hornoch, Ondrejov, obtained R-band
images with the Danish 1.54-m telescope at La Silla on Dec. 3.361
UT that yield position end figures 45s.34, 04".2. Low-resolution
spectra obtained by M. Locke (Christchurch, New Zealand) and by R.
Kaufman (White Cliffs, NSW, Australia) show strong H_alpha and
H_beta emission indicative of a nova. Further magnitudes for the
variable (visual unless noted otherwise; some submitted by E. O.
Waagen, AAVSO): Dec. 1.338, [6.3 (Hornoch; all-sky camera with
R-band filter); 2.340, R = 5.9 (Hornoch); 3.340, R = 4.8 (Hornoch);
3.824, 4.6 (A. Pearce, Nedlands, W. Australia); 4.283, 4.2 (C.
Sigismondi, Rome, Italy); 4.742, 4.5 (Kaufman). Additional details
are given on CBET 3732.
COMET C/2013 R1 (LOVEJOY)
R. W. Russell and D. L. Kim, Aerospace Corporation; M. L.
Sitko, University of Cincinnati and Space Science Institute; P.
Yanamandra-Fisher, Space Science Institute; and D. Griep, Infrared
Telescope Facility (IRTF), report 3- to 13-micron spectroscopy of
comet C/2013 R1 obtained on the NASA IRTF (+ The Aerospace
Corporation's Broadband Array Spectrograph System) on Nov. 11 UT.
A circular aperture of about 4".5 was used, and the spectral
resolving power was about 30-120. The comet was at r = 1.1 AU, and
the spectrum exhibited a strong silicate feature of about 45
percent above the T about 294 K continuum (set in the 8- and
13-micron regions of the spectrum). The fitted temperature was
about 11 percent above the 264-K equilibrium temperature. The
10.5-micron magnitude was 0.95 (+0.1, -0.05), and the integrated
magnitude [N] about 1.1. The 11.3-micron crystalline-olivine grain
feature was prominent. The 3.4-micron data are consistent with the
possible presence of the organic emission feature noted by Russell
et al. on IAUC 9262.
(C) Copyright 2013 CBAT
2013 December 4 (9265) Daniel W. E. Green
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