Electronic Telegram No. 3542
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


NOVA SCORPII 2013 = PSN J17335943-3606216
     Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report their discovery of a possible nova (mag 11.1) in Sco on two unfiltered
40-s CCD frames taken around June 3.6146 UT (limiting magnitude 13.5) using a
105-mm f/4 camera lens (+ SBIG STL6303E camera); they confirmed the object on
five 3-s unfiltered CCD frames taken around June 3.6728 (limiting magnitude
17.4) using a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera).
The new object is located at R.A. = 17h33m59s.43, Decl. = -36d06'21".6
(equinox 2000.0).  The variable was designated PSN J17335943-3606216 when it
was posted at the Central Bureau's TOCP webpage.  Additional CCD magnitudes
for the variable:  May 17.694, [13.4 (Nishiyama and Kabashima); 30.647, [13.4
(Nishiyama and Kabashima); 3.589, I_c = 10.39 (Seiichiro Kiyota, Tsukuba,
Japan; 85-mm f/2 camera lens + ST-10XME CCD camera); 3.628, 11.9 (Akira Takao,
Kitakyushu, Japan; survey images taken with a 100-mm-f.l. f/4 camera lens +
unfiltered STL-6303E camera); 3.7, 11.5 (Ernesto Guido and Nick Howes;
remotely with the iTelescope-network 0.50-m f/6.8 astrograph at Siding Spring,
NSW; position end figures 59s.44, 20".7; UCAC-3 catalogue reference stars;
image posted at website URL http://bit.ly/14paBn2; an animation showing a
comparison between their image and an archival Digitized Sky Survey red plate
from 1996 is posted at URL http://bit.ly/15vP8LS); 4.272, B = 15.8, V = 13.4,
R = 11.8 (T. Yusa, Osaki, Japan; remotely using an iTelescope 0.25-m f/3.4
hyperbolic astrograph + SBIG ST-10XME camera located near Mayhill, NM, U.S.A.;
position end figures 59s.45, 21".1; UCAC-4 reference stars; image posted at
URL http://space.geocities.jp/yusastar77/supernova/PNinSco_130604.htm);
4.4266, V = 13.67 +/- 0.03 (Josch Hambsch, Mol, Belgium; via E. Waagen,
AAVSO); 4.4270, V = 13.64 +/- 0.03 (Hambsch); 4.4274, I = 9.74 +/- 0.01
(Hambsch); 4.4278, I = 9.72 +/- 0.01 (Hambsch).  A. Amorim, Florianopolis,
Brazil, reports visual mag 11.3 on June 3.992 using an 0.18-m reflector.

     Christian Buil, Castanet, France, reports that he obtained spectroscopy
of PNV J17335943-3606216 on June 3.960 UT with an Alpy 600 spectrograph (R =
600) on a 0.2-m telescope; the spectrum shows a very reddened object, with an
intense H-alpha emission line (equivalent width 2.9 nm; FWHM = 1200 km/s),
indicating a probable nova.  His spectrum can be viewed at website URL
http://tinyurl.com/lgc2r99.  E. Waagen, AAVSO, also reports that Terry Bohlsen
(Armidale, NSW, Australia) acquired a spectrogram on June 4 that "is
consistent with a nova and similar to C. Buil's spectra"; Bohlsen obtained
magnitude V = 13.5 at the time of the spectroscopy, adding that the variable
is much brighter in bands R and I.


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

                         (C) Copyright 2013 CBAT
2013 June 4                      (CBET 3542)              Daniel W. E. Green