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Alert Notice 484: Nova Sco 2013 = PNV J17335943-3606216 [V1533 Sco]

June 4, 2013:

Event: Nova Sco 2013 = PNV J17335943-3606216 [V1533 Sco]

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 (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

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 (

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):, their annotated confirmation image:; 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; 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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