Electronic Telegram No. 2264
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


NOVA SAGITTARII 2010 No. 2
     Further to CBET 2261, W. Liller, Vina del Mar, Chile, reports that the
new nova was fainter than mag 11.0 on a pair of photographs (Kodak TP film,
orange filter, 85-mm camera lens) taken on Apr. 20.262 UT.
     E. Guido and G. Sostero report that CCD images obtained on Apr. 25.4 UT
remotely with a 0.25-m reflector from GRAS Observatory near Mayhill, NM,
U.S.A., yield a magnitude of about 12.1 and the following precise position
for the variable:  R.A. = 17h53h02s.99, Decl. = -28d12'19".3 (equinox
2000.0); a comparison between their image and a Digitized Sky Survey 1980
infrared plate is posted at website URL http://bit.ly/bH6fps.
     H. Maehara, Kwasan Observatory, Kyoto University, forwards a report from
M. Fujii (Okayama, Japan) about a low-resolution spectrum (range 400-830 nm)
taken on Apr. 24.77 UT with a 40-cm telescope:  The variable shows a highly
reddened continuum and strong H_alpha emission line; the FWHM of the H_alpha
emission is about 4000 km/s.  The spectrum has been posted at website URL
http://otobs.org/FBO/fko/nova/pn_sgr_20100424.gif.  Maehara adds that his own
CCD images obtained with a 25-cm telescope around Apr. 24.75 yields the
following magnitudes:  Apr. 24.752, I_c = 10.21; 24.754, R_c = 12.47; 24.755,
V = 15.33; the object was fainter than B = 16.9 on Apr. 24.758.  Maehara
notes that these features suggest that the object is a heavily reddened nova.
     S. Kiyota (Tsukuba, Japan) reports the nova's position as R.A. =
17h53h02s.94, Decl. = -28d12'19".0 (equinox 2000.0), together with the
following magnitudes, obtained with a 20-cm reflector (+ Apogee Alta E47+
CCD camera):  Apr. 24.708, I_c = 10.11; 24.709, R_c = 12.39; 24.712, V =
14.66.
     M. Yamanaka, M. Sasada, and R. Itoh, Hiroshima University; and A. Arai,
Kyoto Sangyo University, report that they obtained low-resolution optical
spectroscopy (resolution 400) of this nova on Apr. 24 UT at the Higashi-
Hiroshima Observatory.  The spectrum shows strong emissions of H-alpha and O
I (777.4, 822.7, and 844.6 nm) lines.  The H-alpha emission is broadened, with
FWZI roughly 8600 km/s.  The profile of H-alpha shows a double-peaked profile
with a blue-shifted component.  Weak emission lines of He I are seen in the
spectrum.  The H-beta line was not detected in the spectrum due to the high
reddening.  The deep Na I D line absorption corresponds to high reddening by
interstellar dust.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 April 26                    (CBET 2264)              Daniel W. E. Green