Dear Colleagues, using an image kindly provided by M. Uemura (Kyoto University) I performed astrometry on this nova candidate, getting the following results: R.A.: 07h 37m 56.91s; Decl.: -25d 56' 59.0" (J2000.0) 10 reference stars from USNO A2.0. Mean residuals: 0.22" USNO A2.0 reports the star A0600.06937901 at R.A.: 07h 37m 56.88s; Decl.: -25d 56' 59.1" (J2000.0) m(R)=13.2; B-V=0.6 mag. Confronting these two positions, the two objects are about 0.5" apart. So, A0600.06937901 actually has good probabilities to be the real progenitor (if this is a nova). Regards, Gianluca Masi Taichi Kato wrote: > > Possible Nova in Pup > > The accurate position provided by H. Abe agrees the position of a 14-th > mag USNO star within 1-2 arcsec. If this star is indeed the progenitor > of the erupting object, the color from the comparison between the visual > and 2MASS magnitudes becomes V-J = +2. The color is not particularly red > in this field. Even assuming that the object is not significantly > reddened, the color is still bluer than most of symbiotic stars, which > have V-J colors of +3 to +5 or even larger. If the object is a nova, the > color suggests either a) usual cataclysmic variable with moderate reddening > or b) cataclysmic-type binary with a relatively evolved secondary. > [e.g. U Sco (Porb=1.2d) has a V-J color of +1.5]. > > Regards, > Taichi Kato -- *********************************************************************** * Gianluca Masi "Two things fill the soul * * Via Madonna de Loco, 47 with awe and reverence [...]: * * 03023 Ceccano (FR) the starry sky above me and * * ITALY the moral law within me" * * e-mail: gianmasi@fr.flashnet.it * * web: http://vsnet.eurolink.it/comets/ I. Kant * * Minor Planet Center Obs. Code: 470 - Ceccano * * Center for Backyard Astrophysics - Italy * * VSNET Collaboration Team member * * CCD-astrometry-photometry@egroup mailing-list moderator * ***********************************************************************