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IAUC 9258: V339 Del = N Del 2013 = PNV J20233073+2046041

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                                                  Circular No. 9258
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBATIAU@EPS.HARVARD.EDU           ISSN 0081-0304
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Prepared using the Tamkin Foundation Computer Network


V339 DELPHINI = NOVA DELPHINI 2013 = PNV J20233073+2046041
     As first announced on CBET 3628, S. Nakano (Sumoto, Japan)
reported the discovery by Koichi Itagaki (Teppo-cho, Yamagata,
Japan) of an apparent nova (mag 6.8) on an unfiltered CCD frame
taken on Aug. 14.584 UT using a 0.18-m reflector, with confirming
unfiltered images taken with a 0.60-m reflector on Aug. 14.750 that
show the variable at mag 6.3.  The new object is located at R.A. =
20h23m30s.73, Decl. = +20o46'04".1 (equinox 2000.0).  The variable
was designated PNV J20233073+2046041 when it was posted at the
Central Bureau's TOCP webpage, and N. N. Samus relates that the
confirmed nova (see the spectroscopic report below) has been given
the permanent GCVS designation V339 Del.
     Additional selected CCD magnitudes (unfiltered unless noted
otherwise) for V339 Del:  May 13.998, 17.1 (D. Denisenko et al.,
double 0.40-m MASTER-Kislovodsk reflector; presumed quiescent star;
limiting mag 18.9); Aug. 13.565, [13.0 (Itagaki); 14.062 and 14.095,
[12 (C. Jacques and E. Pimentel, Belo Horizonte, Brazil; Canon Eos
350D camera + 105-mm-f.l. lens); 14.8, R = 6.1 (E. Guido, N. Ruocco,
and N. Howes; 0.25-m telescope at Sorrento, Italy; position end
figures 30s.68, 03".7); 14.894, 6.8 (G. Masi, P. Schmeer, and F.
Nocentini; remotely using a 43-cm robotic telescope at Ceccano,
Italy; position end figures 30s.68, 03".7).  This nova continued to
brighten after discovery to visual mag about 4.5 around Aug. 17,
with additional visual and CCD magnitudes provided on CBET 3634.
     Denisenko et al. suggest that the variable is identical to the
blue star USNO-B1.0 1107-0509795 (position end figures 30s.713,
03".97; blue mag 17.2-17.4, red mag 17.4-17.7) and to the
ultraviolet source GALEX J202330.7+204603.  Strong H_alpha and
H_beta emission has been noted by Masi et al. (low-resolution
spectra taken with a 36-cm robotic telescope at Ceccano; scale
about 3.4 nm/pixel) on Aug. 15.03.
     Additional selected visual-magnitude estimates for V339 Del
reported to the Central Bureau:  Aug. 20.813, 5.3 (S. Baroni, Milan,
Italy); 21.024, 5.3 (W. Souza, Sao Paulo, Brazil; moonlight);
21.874, 5.6 (P. Schmeer, Bischmisheim, Germany); 22.875, 5.5 (L.
Parmeggiani, Ganges, France); 23.794, 5.8 (Baroni); 24.948, 5.9 (E.
Broens, Mol, Belgium); 25.956, 5.9 (Broens); 26.99, 6.2 (Jose G. de
S. Aguiar, Campinas, Brazil); 27.917, 6.3 (Souza); 28.98, 6.4
(Aguiar); 29.958, 6.6 (Broens); 30.901, 6.6 (Broens); 31.792, 6.8
(Baroni); Sept. 1.924, 6.9 (Souza); 2.927, 7.1 (Souza).

                      (C) Copyright 2013 CBAT
2013 September 3               (9258)            Daniel W. E. Green

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