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AAVSO Special Notice #164: Possible Nova in Sagittarius AAVSO HOME > publications > special notice

AAVSO Special Notice #164

Possible Nova in Sagittarius
August 7, 2009

Coordinates (from Nishiyama and Kabashima): 
RA = 18h 07m 07.67s, Dec = -33d 46m 33.9s (2000.0)

Brian Marsden announces in CBET No. 1899 the independent discovery of a 
possible nova (Nova Sagittarii 2009 No. 3) by:

Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, and Fujio Kabashima, 
Miyaki-cho, Saga-ken, Japan, at unfiltered magnitude 7.7 on two 60-second 
frames taken Aug. 6.494 and 6.495 UT. They confirmed the discovery on five 
frames taken around Aug. 6.494. No motion was seen during 80 minutes and 
nothing was visible at this location down to 12.7 on survey frames taken 
July 22.531 and 29.584 UT.  Nothing was seen on the DSS (POSS2/UKSTU red), 
or in ASAS, AAVSO VSX, SIMBAD, 2MASS and USNO-B1.0 catalogues, although 
the USNO-B1.0 shows a faint star (I = 12.45) nearby (at end figures 
07.509s, 33.13").

Grzegorz Pojmanski, Dorota Szczygiel, and Bogumil Pilecki, Warsaw 
University Astronomical Observatory, observed by ASAS3 at V = 7.78 on Aug. 
6.182 UT at the approximate position RA = 18h 07m 08s, Dec = -33d 46.6m.  
Nothing was visible on Aug. 4.152 UT.  The ASAS light curve and images can 
be found at,5040 .

Leonid Elenin, Moscow, also confirmed (via vsnet-alert 11371) the presence 
of the object using a remote astrograph in Pingelly, Australia, providing 
position end figures 07.67s, 34.9s, +/-0.14".

A sequence has not yet been established for this object, but a finder 
chart may be plotted by entering the coordinates into VSP:

This object has been assigned the name VSX J180707.6-334633 with the
AUID 000-BJP-536. Please report observations to the AAVSO International 
Database using the name Nova Sgr 2009 No. 3 or VSX J180707.6-334633.

Good observing,

Elizabeth Waagen, AAVSO


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