[IAUC] IAUC 9280: V3661 Oph = N OPH 2016 = PNV 17355050-2934240 [25139-2012/04-R1]

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                                                  Circular No. 9280
Central Bureau for Astronomical Telegrams
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Prepared using the Tamkin Foundation Computer Network


V3661 OPHIUCHI = NOVA OPH 2016 = PNV 17355050-2934240
     H. Yamaoka, Kyushu University, reports the discovery of a
possible nova (mag about 10.6) by M. Yamamoto (Okazaki, Aichi,
Japan) on four 15-s frames (limiting mag about 12.7) taken during
Mar. 11.80-11.82 UT with a Canon 5DMRK2 camera (+ 135-mm-f.l. lens).
The position was given as R.A. = 17h35m50s.5, Decl. = -2o34'24"
(equinox 2000.0; uncertainty +/- 5").  The variable was designated
PNV 17355050-2934240 when it was posted at the Central Bureau's
TOCP webpage.  Yamaoka also reports the independent discovery of
PNV J17355050-2934240 (at mag about 10.6 at position end figures
51s.1, 22") by Y. Nakamura (Kameyama, Mie, Japan) on a 30-s CCD
image (limiting mag about 14.0) taken on Mar. 11.832 using a
135-mm-f.l. lens.  Additional CCD magnitudes for the variable:
Feb. 10.837, [11.0 (Yamamoto); Mar. 1.849, [13.5 (Nakamura); 7.817,
[13.0 (T. Kojima, Tsumagoi, Gunma-ken, Japan; Canon EOS 6D camera +
200-mm-f.l. lens; communicated by S. Nakano, Sumoto, Japan); 9.827,
12.6 (Kojima; two pre-discovery survey frames; limiting mag 13.3;
position end figures 50s.56, 19".0 and magnitude 13.8 measured by
Nakano from a JPEG image, with estimated uncertainty +/- 2");
12.461, V = 10.99, I_c = 8.38 (S. Kiyota, Kamagaya, Japan; remotely
with a 0.25-m astrograph at Mayhill, NM, USA; position end figures
50s.41, 24".0); 15.771, 10.9 (Y. Sakurai, Mito, Ibaraki-ken, Japan;
two 15-s exposures with a 180-mm-f.l. lens + Nikon D7100 camera;
limiting mag 13.0; position end figures 50s.5, 26"; communicated by
Nakano).  Visual magnitude estimates for the new variable from A.
Pearce, Nedlands, W. Australia:  Mar. 12.791, 11.7; 13.831, 11.8.
     U. Munari, Padova Observatory, reports that spectroscopy
obtained on Mar. 14.15 UT by U. Sollecchia with a 20-cm telescope
in central Italy (600 lines/mm) through clouds, shows a continuum
that is very red, with a broad H_alpha emission line sitting on the
continuum; the FWHM of the hydrogen line is about 1400 km/s, and a
P-Cyg absorption appears at -950 km/s from the emission.  Overall,
this is the spectrum of a nova.  Munari notes the very red color of
the nova, as seen in the following photometry of the nova that he
obtained with F.-J. Hambsch and A. Frigo:  Mar. 12.400, V = 10.81,
B-V = +2.42, V-I = +2.68; 13.328, 10.84, +2.58, +2.81; 14.326,
11.32, +2.64, +3.12.  Additional details are given on CBET 4265.
     E. Kazarovets and N. Samus note that the permanent GCVS
designation V3661 Oph has been assigned to this variable.

                      (C) Copyright 2016 CBAT
2016 March 16                  (9280)            Daniel W. E. Green