Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits


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 8362  SEARCH Read IAUC 8364

View IAUC 8363 in .dvi or .ps format.
IAUC number

                                                  Circular No. 8363
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)

     On June 16, S. Nakano (Sumoto, Japan) reported the discovery
by Yuji Nakamura (Kameyama, Mie-ken, Japan) of a possible nova (mag
11.5) on Tri-X photographs taken on June 13.632 UT with a 200-mm
f/4 telephoto lens; the new object was reported by Nakamura to be
located at R.A. = 18h39m26s.4, Decl. = +26o04'09" (equinox 2000.0;
uncertainties +/- 30"), and he added that nothing was visible
around this position on approximately 50 patrol films taken during
1999-2004 (limiting mag 12).  K. Itagaki (Yamagata, Japan, 0.60-m
f/5.7 reflector) reports the following position end figures from a
CCD image obtained on June 20.488 (with the object at mag 12.8):
26s.16, 09".8.  J. Bedient (Honolulu, HI) reports that images taken
on June 22 with the University of Hawaii 2.2-m reflector suggest
that the star in outburst is the western star of a close pair; his
position end figures for the variable are 26s.16, 10".0, which he
notes is 1".3 north of 2MASS 18392619+2604087.  Following a request
by the Central Bureau, T. Matheson, P. Challis, and R. Kirshner
(Harvard-Smithsonian Center for Astrophysics) report that a
spectrogram (range 370-750 nm), obtained by E. Adams on June 23.32
with the Mt. Hopkins 1.5-m telescope (+ FAST), shows it to be a
cataclysmic variable.  The spectrum consists of a blue continuum
with double-peaked emission lines of hydrogen; the full-width-at-
half-maximum of the H_alpha line is 2000 km/s.  T. Harrison and H.
Osborne write that a red spectrum (range 700-900 nm) of the object,
obtained with the 2.1-m reflector at Kitt Peak on June 22, shows no
emission or absorption lines (and so is not a late-type star).  A.
Price and E. O. Waagen, AAVSO, note that the available photometry
of the variable indicate that this is a WZ-Sge-type dwarf nova.
Additional magnitudes (CCD and unfiltered unless otherwise noted)
for the variable star, provided in part by Waagen and Price:  June
17.523, 12.0 (Nakamura; 300-mm f/4 lens + Fuji digital camera);
17.562, 12.3 (Itagaki); 18.138, V = 12.1 (R. James, Las Cruces,
NM); 18.309, V = 11.8 (R. Royer, Springville, CA); 19.228, V = 12.3
(James); 20.315, 12.5 (M. Simonsen, Imlay City, MI; visual);
20.488, 12.8 (Itagaki); 21.189, 12.6 (Simonsen); 21.229, V = 12.6
(James); 21.960, 13.0 (G. Poyner, Birmingham, England; visual);
22.050, 13.1 (Poyner); 22.400, V = 12.8 (James); 22.48, 13.2
(Itagaki); 24.044, 13.2 (P. Schmeer, Bischmisheim, Germany; visual);
30.115, 14.3 (M. Mattei, Littleton, MA); 30.156, R = 14.1 (M.
Koppelman, Golden Valley, MN); 30.166, V = 14.6 (B. Gary, Hereford,

                      (C) Copyright 2004 CBAT
2004 June 30                   (8363)            Daniel W. E. Green

Read IAUC 8362  SEARCH Read IAUC 8364

View IAUC 8363 in .dvi or .ps format.

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

Valid HTML 4.01!