[IAUC] CBET 3166: 20120707 : NOVA SAGITTARII 2012 No. 4 = PNV J18202726-2744263

Sab Jul 7 15:12:14 ART 2012

                                                  Electronic Telegram No. 3166
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


NOVA SAGITTARII 2012 No. 4 = PNV J18202726-2744263
     Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report their discovery of possible nova (mag 7.8) on two 40-s unfiltered CCD
frames (limiting magnitude 13.7) taken around July 7.4986 UT using a 105-mm
f/4 camera lens (+ SBIG STL6303E camera).  Five 3-s unfiltered CCD confirming
frames (limiting magnitude 17.0) were taken around July 7.5091 using a Meade
200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera); they provided the
position for the new variable star as R.A. = 18h20m27s.26, Decl. =
-27d44'26".3 (equinox 2000.0), though they did not specify which image or
instrumentation was used for the astrometry.  The variable was designated PNV
J18202726-2744263 when it was posted at the Central Bureau's TOCP webpage.
Additional magnitudes for PNV J18202726-2744263:  June 12.637, [13.6
(Nishiyama and Kabashima); June 13.609, [13.3 (Nishiyama and Kabashima);
June 20, [13 (Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan, Canon
EOS 5D Digital Camera + Canon 200-mm f/3.2 lens; communicated by S. Nakano,
Sumoto, Japan); June 28, [9.0 (Hiroshi Kaneda, Minami-ku, Sapporo, Japan;
Nikon D40 Digital Camera + 105-mm f/2.5 lens; communicated by Nakano); June 29,
[8.6 (Kaneda); July 7.496, 8.9 (Nishimura; independent discovery on four 15-s
exposures as above; limiting mag 14.7; observing site Mt. Ogasa, Kakegawa;
position end figures 27s.11, 26".1); July 7.499, 7.8 (Kaneda; independent
discovery on four unfiltered 3-s frames as above; limiting mag 8.7; position
end figures 27s.59, 26".2; positional uncertainty stated as +/- 15"); July
7.520, 7.7 (Shizuo Kaneko, Kamiyashiki, Kakegawa, Shizuoka-ken, Japan;
independent discovery on two 10-s frames taken with a Canon EOS 5D Mark II
Digital Camera + Canon 200-mm f/2.8 lens; position end figures 27s.30, 26".5;
communicated by Nakano); July 7.613, I_c = 6.89 (Hiroyuki Maehara, Kwasan
Observatory, Kyoto University; 0.25-m telescope); July 7.617, R_c = 7.31
(Maehara); July 7.618, V = 7.77 (Maehara); July 7.620, B = 8.18 (Maehara).
     Maehara also forwards a report from Mitsugu Fujii (Okayama, Japan), who
obtained a low-resolution spectrum (R about 500, range 390-950 nm) of PNV
J18202726-2744263 on July 7.629 UT with a 40-cm telescope at the Fujii
Kurosaki Observatory.  The spectrum shows Balmer series, Fe II multiplets 37,
42, 48, 49, 55, 73, and 74; Na I D; O I 777.3- and 844.6-nm; and Ca II
849.8- and 854.2-nm lines in emission.  These features indicate that the
variable is a "Fe II"-class nova.  His spectrum has been posted at website
URL http://otobs.org/FBO/novae/pnv_j18202726-2744263.htm.


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

                         (C) Copyright 2012 CBAT
2012 July 7                      (CBET 3166)              Daniel W. E. Green