[vsnet-alert 11372] Re: Possible nova in Sagittarius: ASAS 180708-3346.6

[Hiroyuki Maehara]

 Mitsugu Fujii (Fujii Bisei Observatory, Okayama, Japan) reports 
the spectrum of ASAS 180708-3346.6 taken on 2009 Aug. 7.60(UT). 
The object shows Balmer series emission lines and Fe II emission 
lines. The FWHM of Halpha emission is 2300km/sec.
The object is confirmed spectroscopically as a nova.

http://otobs.org/FBO/novae/pn_sgr_20090807.60.gif


On Sat, Aug 08, 2009 at 12:01:16AM +0900, Hiroyuki Maehara wrote:
>  I have just performed CCD photometry of the object.
> The object seems to have slightly brightened since the discovery.
> 
>  Follow-up observations (especially spectroscopic observations)
> are required.
> 
> object            YYYYMMDD(UT)   mag      code
> ASAS180708-3346.6 20090807.57499 6.44Ic   Mhh.VSOLJ
> ASAS180708-3346.6 20090807.57587 6.95Rc   Mhh.VSOLJ
> ASAS180708-3346.6 20090807.57692 7.43V    Mhh.VSOLJ
> ASAS180708-3346.6 20090807.57833 8.03B    Mhh.VSOLJ
> ASAS180708-3346.6 20090807.57991 7.35y    Mhh.VSOLJ
> 
> 
> 
> On Fri, Aug 07, 2009 at 14:16:14, Grzegorz Pojmanski wrote:
> > Possible nova in Sagittarius: ASAS 180708-3346.6
> > 
> > Grzegorz Pojmanski, Dorota Szczygiel and Bogumil Pilecki of Warsaw 
> > University Astronomical Observatory report:
> > ASAS3V instrument of The All Sky Automated Survey (telephoto lens 200/2.8, 
> > diameter 70mm + CCD + Johnsons V  filter, 3 minute exposures, pixel size 
> > 14.8 arcsec, rms astrometric accuracy - 4  arcsec) 
> > 
> > has detected possible outburst of nova located at
> > at RA = 18h 07m 08s  DEC = -33d 46'.6
> > 
> > Object was V=7.78 on August 06, 2009. Due to bad weather and technical 
> > maintenance on our site we were unable to get more observations, but
> > object was detected at the same positions on three exposures separated 
> > by one minute.
> > 
> > Several faint sources are present close to this position in the DSS image and
> > USNO-B catalog, so no progenitor could be suggested based on the ASAS 
> > astrometry.
> >  
> > Observations 
> >     DATE      UT                       HJD      V
> > 04/08/2009 03:39:03 (Aug 04.152) 2455047.6568 invisible
> > 06/08/2009 04:22:01 (Aug 06.182) 2455049.6865 7.78
> > 
> > Light curve and images can be found on
> > http://www.astrouw.edu.pl/cgi-asas/asas_disc/180708-3346.6,5040
> > 
> > Regards, Grzegorz Pojmanski