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THE ASTRONOMER Electronic Circular No 2205      2006 Mar 03 16.14UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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GRB 060218
G. Cusumano (IASF-Pa INAF), reports on GCN 4775 that at 03.34.30UT on 
Feb 18 the Swift Burst Alert Telescope (BAT) triggered an alert for GRB 
060218. The provisional position is:
RA 03h 21m 37s DEC +16 51' 58" (2000).
UVOT began taking data 152 seconds after the BAT trigger and there is an 
indication of an afterglow candidate at:
RA 03h 21m 39.8s DEC +16 52' 06" (2000) with an estimated B magnitude of 
19.4.

N. Mirabal, University of Michigan, reports on GCN 4784 observation of 
the candidate optical afterglow of Swift GRB 060218, detected by the 
Swift UVOT, with the MDM 2.4m telescope and RETROCAM imager under partly 
cloudy conditions. Calibration with SDSS pre-burst observations yields r 
= 17.55 +/- 0.1 on Feb.19.1438 UT for the OT. This is brighter than the 
pre-burst observations and confirms it is the OT of GRB 060218.
On GCN 4783 Mirabal adds that an extended object has also been detected 
at RA 03h21m39.68s DEC +16 52' 01.66" (2000). Given the proximity of 
this object to the reported XRT and UVOT positions for a candidate 
afterglow, this should be considered a potential
host galaxy of a low-redshift GRB. Further multiwavelength observations 
are encouraged to confirm the reality of this trigger and its possible 
association with this nearby galaxy.

V5117 SAGITTARII = NOVA SAGITTARII 2006
The object reported on TA E-Circular 2203 and found by Bill Liller of 
Chile has been designated V5117 Sagittarii according to N. N. Samus of 
the Institute of Astronomy, Russian Academy of Sciences.

SUPERNOVA 2006aa IN NGC 3947
Discovery by Lick Observatory Supernova Survey of a possible supernova 
(IAUC 8669):
SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006aa  Feb.  8.48  11 53 19.89  +20 45 18.2  18.1   6.5"W, 12.2"N

SUPERNOVA 2006ab IN PGC 10652
Discovery by Lick Observatory Supernova Survey of a possible supernova 
(IAUC 8669):
SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006ab  Feb.  9.18  02 48 53.92  +53 02 20.8  18.0   9.2"E,  6.2"N

SUPERNOVA 2006ac IN NGC 4619
Discovery by Lick Observatory Supernova Survey of a possible supernova 
(IAUC 8669):
SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006ac  Feb.  9.47  12 41 44.86  +35 04 07.1  16.0   4.1"E, 21.7"N

SUPERNOVA 2006ad IN ANONYMOUS GALAXY
Discovery by Nearby Supernova factory of a possible supernova (CBET 
398):
SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006ad  Feb.  8.93  09 07 43.11  +12 03 06.5  18.9   Not given

Guy M Hurst