Possible Nova in Sgr - J17522579-2126215

Following the posting on the Central Bureau's Transient Object Confirmation Page about a possible Nova in Sgr (TOCP Designation: J17522579-2126215) we performed some follow-up of this object remotely through the 0.10-m f/5 reflector + CCD of ITelescope network (MPC Code - H06). 

On our images taken on June 27.3, 2012 we can confirm the presence of an optical counterpart with R-filtered CCD magnitude 8.9 at coordinates:

R.A. = 17 52 25.79, Decl.= -21 26 21.6

(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:

UPDATE - July 08, 2012

According to Cbet 3156, this variable has been designated NOVA SAGITTARII 2012 No. 3. This nova was discovered by K. Itagaki (Yamagata, Japan) on an unfiltered CCD image taken on June 26.5494 UT with a 0.21-m reflector (mag 10.3). Spectra obtained by different observers (K. Imamura; H. Maehara; C. Buil; U. Munari) suggests that this nova is of theHe/N type, with hydrogen Balmer and He I in strong emission.

Spectrum by K. Imamura (OUS)

by Ernesto Guido, Giovanni Sostero & Nick Howes

Possible Nova in Scorpius

CBET circular No. 2262, issued on April 26, 2010, announces the discovery by K. Nishiyama & F. Kabashima (Japan) of another possible nova (mag 8.6) on two 40-s unfiltered CCD frames (limiting magnitude 13.1) taken around Apr. 25.788 UT using a 105-mm f/4 camera lens (+ SBIG STL6303E camera). The same CBET reports indipendent discovery by H. Nishimura & T. Kojima.

We performed some follow-up of this object remotely through a 0.25-m, f/3,4 reflector + CCD, from GRAS Observatory (near Mayhill, NM).

On our images taken on April 26.4, 2010 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude about 8.2 (UCAC2 Catalogue reference stars) at coordinates:

R.A. = 16 55 13.17, Decl.= -38 03 47.8

(equinox 2000.0; UCAC2 catalogue reference stars).

Our confirmation image:

This is an animation showing a comparison between our image and the archive DSS plate (R Filter - 1995). Click on it for a bigger version.

UPDATE - MAY 06, 2010

According to IAUC circular No. 9142, a low-dispersion spectrum (range 420-850 nm, resolution about 500) of this object, taken by K. Kinugasa, H. Takahashi, and O. Hashimoto on Apr. 29.745 UT with the GAO 1.5-m telescope (+ GLOWS), shows broad (FWHM about 4000 km/s) Balmer and O I (777.4-, 822.7-, and 844.6-nm) emission lines. The features indicate that the object is a He/N nova in a declining phase.

The permanent GCVS designation V1311 Sco has been assigned to this nova.

V1311 SCORPII = NOVA SCORPII 2010 No. 2

by Ernesto Guido and Giovanni Sostero