Electronic Telegram No. 4285
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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Prepared using the Tamkin Foundation Computer Network


NOVA SCORPII 2016 = PNV J17381927-3725077
     S. Nakano, Sumoto, Japan, reports the discovery by Hideo Nishimura
(Kakegawa, Shizuoka-ken, Japan) of an apparent nova (mag 12.4) on three 10-s
CCD frames (limiting magnitude about 14) taken on June 10.629 UT using a
200-mm-f.l. f/3.2 lens with a Canon EOS 5D digital camera; the new object's
position was measured to be R.A. = 17h38m19s.27, Decl. = -37d25'07".7
(equinox 2000.0).  The variable was designated PNV J17381927-3725077 when it
was posted at the Central Bureau's TOCP webpage.  Additional CCD magnitudes
for PNV J17381927-3725077 that have been reported to the Central Bureau:
May 14.712, [12.5 (Nishimura); 18.602 [12.9 (Nishimura); June 5.532, [13.0
(Nishimura); 5.582, [13 (T. Kojima, Gunma-ken, Japan; patrol frames taken
using a 135-mm-f.l. lens + Canon EOS 6D digital camera; communicated by
Nakano); 9.596, 11.8 (Kojima; pre-discovery image found on three frames;
position end figures 18s.8, 10"; communicated by Nakano); 11.255, V = 12.36,
R_c = 11.42, I_c = 10.00 (S. Kiyota, Kamagaya, Japan; remotely with a 0.50-m
f/4.5 CDK astrograph near Mayhill, NM, USA; image posted at website URL
//meineko.sakura.ne.jp/ccd/PNV_J17381927-3725077.jpg); 11.506, 10.4 (K.
Itagaki, Yamagata, Japan; 0.50-m f/7.7 reflector at Tochigi station; position
end figures 19s.22, 07".8; reference stars from UCAC4 catalogue; communicated
by Nakano); 11.513, 11.3 (T. Noguchi, Katori, Chiba-ken, Japan; 0.23-m f/6.3
Schmidt-Cassegrain reflector; position end figures 19s.27, 09".1; reference
stars from UCAC4 catalogue; communicated by Nakano; image posted at website
URL http://park8.wakwak.com/~ngc/images/PNVinSco_20160611.jpg); 11.612, R =
10.95 (F. Watanabe and H. Naito, Nayoro Observatory, 0.4-m Meili telescope;
reference stars from UCAC-4 catalogue).  P. Schmeer, Bischmisheim, Germany,
writes that a star of red mag 17.1-17.4 in the USNO-B1.0 catalogue has
position end figures 19s.26, 07".7; he adds that a potentially better
progenitor candidate can be seen on the Digitized Sky Survey infrared image
just southwest of the USNO-B1.0 star.
     K. Ayani, Bisei Astronomical Observatory (BAO), obtained a low-dispersion
spectrogram (resolution 0.5 nm; range 400-800 nm) of PNV J17381927-3725077 on
June 11.65 UT with the BAO 1.01-m telescope.  The spectrum shows a prominent
and broad H-alpha emission line (FWHM about 1800 km/s, equivalent width about
23 nm) and a broad H-beta emission line, which shows the star to be a nova in
an early phase.  Ayani's spectrogram can be viewed via the following website
URL:  http://tinyurl.com/zqjkgjd.


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

                         (C) Copyright 2016 CBAT
2016 June 13                     (CBET 4285)              Daniel W. E. Green