Electronic Telegram No. 4295
Central Bureau for Astronomical Telegrams
Mailing address:  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 IN SAGITTARIUS = TCP J18010780-2631434
     K. Nishiyama, Kurume, Japan; and F. Kabashima, Miyaki, Japan, report
their discovery of an apparent nova (mag 10.7) on two 40-s unfiltered CCD
frames (limiting magnitude 13.0) taken around Aug. 8.532 UT with a 135-mm f/4
camera lens (+ FLI 09000 camera).  They confirmed the presence of the new
star on five 5-s unfiltered CCD frames (limiting magnitude 17.7) taken
around the same time using a 0.50-m f/6.8 reflector (+ FLI 1001E camera).
The measured position was given as R.A. = 18h01m07s.80, Decl. = -26d31'43".4
(equinox 2000.0).  Nothing is visible at this position on two past survey
frames taken on Aug. 2.535 (limiting mag 12.9) and 8.556 (limiting mag 11.9),
nor on the Digitized Sky Survey.  They add that a USNO-B1.0 catalogue star
with red magnitude 20.7 has position end figures 07s.74, 45".0.  The variable
was designated TCP J18010780-2631434 when it was posted at the Central
Bureau's TOCP webpage.  S. Nakano, Sumoto, Japan, reports that M. Yamamoto,
(Okazaki, Japan) found the following magnitudes for TCP J18010780-2631434 on
his survey frames taken with a 135-mm.f.l. f/3.2 lens (+ Canon 5DMRK2 digital
camera):  Aug. 8.472, 12.2; 9.477, 11.2.  Yamamoto measured position end
figures 07s.7, 47" (uncertainty +/- 5").  P. Schmeer, Bischmisheim, Germany,
writes that this variable was found also on Aug. 6.96 at mag about 13.3 by
the "All Sky Automated Survey for Supernovae" using a 14-cm telescope at
Cerro Tololo (position end figures 07s.74, 42".0; as posted at website URL
http://www.astronomerstelegram.org/?read=9343).
     H. Maehara, Okayama Astrophysical Observatory, forwards a report by
M. Fujii (Okayama, Japan), who obtained a low-resolution spectrum (range
450-950 nm; R = 600 at H-alpha) of TCP J18010780-2631434 on Aug. 8.558 UT with
the 0.4-m telescope at Fujii Kurosaki Observatory, Okayama.  The spectrum
shows a red continuum dominated by H-alpha emission line with a P-Cyg
profile.  The absorption component is blue-shifted by -1700 km/s with respect
to the emission peak.  H-beta and O I (777.3- and 844.6-nm) lines are also
seen in emission.  The spectrum is posted at the following website URL:
http://otobs.org/FBO/fko/nova/asassn-16ig_20160808.png.  These features
suggest that the object is a classical nova in outburst.
     Maehara forwards the following CCD magnitude estimates of TCP
J18010780-2631434:  Aug. 8.149 UT, V = 12.95 (S. Kiyota, Chiba, Japan); 8.151,
R_c = 11.70 (Kiyota); 8.153, I_c = 10.54 (Kiyota); 8.155, B = 14.79 (Kiyota);
8.409, V = 12.80 (Kiyota); 8.411, R_c = 11.53 (Kiyota); 8.414, I_c = 10.43
(Kiyota); 08.416, B = 14.99 (Kiyota); 8.503, 11.8 (A. Takao, Fukuoka, Japan);
8.554, 11.6 (Takao); 8.570, 11.5 (Takao); 8.595, 11.5 (Takao); 9.491, I_c =
9.57, V = 12.02 (Maehara); 9.598, V = 11.81 (H. Itoh, Tokyo, Japan); 9.599,
I_c = 9.20 (Itoh); 9.599, R_c = 10.58 (Itoh); 9.603, B = 14.30 (Itoh); 9.491,
I_c = 9.57, V = 12.02 (Maehara); 10.486, I_c = 9.11, V = 11.49 (Maehara);
11.533, I_c = 9.25, V = 11.86 (Maehara).


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

                         (C) Copyright 2016 CBAT
2016 August 12                   (CBET 4295)              Daniel W. E. Green