Monday, July 9, 2012

NOVA SAGITTARII 2012 No. 4

Cbet 3166, issued on 2012 July 07, reports the discovery by Koichi Nishiyama and Fujio Kabashima (Japan) of a 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). The variable was designated PNV J18202726-2744263 when it was posted at the Central Bureau's TOCP webpage.

The nova has been designated NOVA SAGITTARII 2012 No. 4.

We performed some follow-up of this object remotely through the 2.0-m  f/10.0 Ritchey-Chretien + CCD of "Faulkes Telescope South" (MPC Code - E10). On our images taken on July 09.4, 2012 we can confirm the presence of an optical counterpart with R-filtered CCD magnitude 8.7 at coordinates:

R.A. = 18 20 27.20, Decl.= -27 44 26.2

(equinox 2000.0; CMC-14 catalogue reference stars).

Our annotated confirmation image. Click on it for a bigger version:


An animation showing a comparison between our confirmation image and the archive POSS2/UKSTU plate (R Filter - 1996). Click on the thumbnail below:

 

Spectra obtained by different observers (M. Fujii; K. Imamura; C. Buil) indicate that the variable is a "Fe II"-class nova

Spectrum by K. Imamura (OUS)


by E. Guido, N. Howes, M. Jenkins, J. Hodge & G. Sostero

No comments: