June 4, 2013:
Event: Nova Sco 2013 = PNV J17335943-3606216
Discovered by: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)
Discovery Magnitude: unfiltered CCD magnitude 11.1, from two 40-s unfiltered CCD frames, using a 105-mm f/4 camera lens (+SBIG STL6303E camera)
Discovery date: 2013 June 03.6146 UT
Coordinates: R.A. = 17 33 59.44, Decl.= -36 06 20.7 (2000.0)
measured by Ernesto Guido and Nick Howes on image taken 2013 June 3.7 UT (see Note d).
Spectra: Spectra by Christian Buil (Toulouse, France) taken on 2013 June 3.960 UT, image at http://www.astrosurf.com/buil/forum/_pnvj17335943-3606216_20130603_960_cbuil.png  (reported to the AAVSO by Francois Teyssier (Rouen, France)), and spectra by Terry Bohlsen (Armidale, NSW, Australia) on 2013 June 4 (reported via vnet-alert 15799) showed the object to be a nova, likely highly reddened.
Observations reported to the AAVSO:
2013 Jun. 03.99236 UT, 11.3 (Alexandre Amorim, Florianopolis, Brazil);
04, 13.5 V (Terry Bohlsen, Armidale, NSW, Australia, via vsnet-alert 15799);
04.42659, 13.674 V +/-0.026 (Josch Hambsch, Mol, Belgium);
04.42699, 13.638 V +/-0.026 (Hambsch);
04.42744, 9.736 I +/-0.007 (Hambsch);
04.42785, 9.721 I +/-0.007 (Hambsch);
Charts: Charts for N Sco 2013 may be created using the AAVSO Variable Star Plotter (VSP) at http://www.aavso.org/vsp .
Submit observations: Please submit observations to the AAVSO International Database using the name N SCO 2013 until a GCVS name is assigned and announced.
a. Announced on IAU CBAT Central Bureau Electronic Telegram 3542 (Daniel W. E. Green, ed.).
b. Nova Sco 2013 was designated PNV J17335943-3606216 when it was posted on the CBAT TOCP webpage (http://www.cbat.eps.harvard.edu/unconf/tocp.html ).
c. Confirmed by discoverers on frames taken around 2013 June 03.6728 UT, using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera).
d. Additional confirmation reports by 1) Ernesto Guido and Nick Howes, June 03.7 UT, magnitude 11.5U, remotely through the 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer of ITelescope network (Siding Spring, AU), their animation showing a comparison between confirmation image and the archive POSS2/UKSTU plate (R Filter - 1996): http://bit.ly/15vP8LS , their annotated confirmation image: http://bit.ly/14paBn2 ; 2) Akira Takao (Kitakyushu-City, Japan), June 03.6278, 11.9C, using 100mm F4 lens and unfiltered STL-6303E; 3) Koichi Itagaki (Teppo-cho, Yamagata, Japan), 03.757, 11.1U (image at http://www.k-itagaki.jp/images/sco.jpg ; 4) Seiichiro Kiyota (Tsukuba, Japan), June 03.5886, 10.39 Ic using with 85mm camera lens (F2.0) + ST-10XME CCD camera.
e. The discoverers report nothing was visible down to magnitude 13.4 on their survey frames taken 2013 May 17.694 and 30.647 UT, nor on 2MASS or USNO-B1.0. The nearest star in USNO B1.0 has position end figures 59.515s, 25.68", distance 4.2", magnitudes R2=18.18, I=17.4.
Congratulations to Koichi Nishiyama and Fujio Kabashima on their discovery!
This AAVSO Alert Notice was prepared by Elizabeth O. Waagen.
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