Skip to main content

Web Publications


AAVSO Special Notice #138: Probable Nova in Sagittarius AAVSO HOME > publications > special notice

AAVSO Special Notice #138

Probable Nova in Sagittarius
December 2, 2008

As announced in CBET 1591 (D.W.E. Green, editor), W. Liller of 
Vina del Mar, Chile announced the discovery of a probable nova
in Sagittarius on 2008 November 29.040 (JD 2454799.540); the
object was at an approximate magnitude of 8.0 on photographs
taken with Tech Pan film with an orange filter.  A subsequent
photograph taken on 2008 November 29.999 (JD 2454800.499)
showed the object at a magnitude of 7.8 (orange filter).  The
object was detected at magnitude 10.3 on 2008 November 23.037
(JD 2454793.537), but was fainter than magnitude 11.0 on 2008 
November 20.035 (JD 2454790.535).  Subsequent objective grating
spectrographs also by W. Liller indicate strong H-alpha emission
with FWHM of approximately 2500 km/s, meaning this object is
almost certainly a nova.  As reported in vsnet-alert 10774,
the object was also detected by H. Maehara on 2008 Dec 2.36
(JD 2454802.86) at an approximate V magnitude of 8.76.

The photographic astrometry provided by Liller is accurate to
approximately 1 arcminute, and the nova has not yet been
precisely identified within the field.  Both photometry and
astrometry are urgently requested at this time.  This object
is very close to the horizon at sunset, and will soon be lost
for the season.  Observations within the next few days are
critical.  


Approximate (J2000) coordinates for this nova are:

RA: 18 22 00 , Dec: -28 03 00  (1+ arcmin)


Finder charts for this field may be plotted by entering 
the coordinates above into VSP:

http://www.aavso.org/observing/charts/vsp/


Please report all observations to the AAVSO using the name 
"N SGR 08#2"; the AUID for this object is "000-BJJ-234".  
An AAVSO Alert Notice will be issued if and when precise 
astrometry is available, and the object will be added to 
VSX at that time.


This AAVSO Special Notice was prepared by Matthew Templeton.

---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/observing/submit/

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/publications/specialnotice/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/publications/email/

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484