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THE ASTRONOMER Electronic Circular No 2716      2011 Mar 12 16.26UT
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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STELLAR OCCULTATION BY TRANSNEPTUNIAN OBJECT (208996) 2003 AZ84
F. Braga-Ribas, et. al., Observatoire de Paris and others report on CBET 
2675 the positive detection of an occultation of a faint star (mag R 
about 18) by the transneptunian object (208996) 2003 AZ84 on 2011 Jan. 
8d06h29m59s UT (mid-time), from the SPACE Observatory. The occultation 
was recorded by A. Maury with the C. Harlinten 0.5-m Planewave telescope 
there, and also by J. L. Ortiz with the remotely operated 0.4-m ASH2 
telescope of the IAA in Spain.  E. Jehin and J. Manfroid report that no 
drop of the flux was observed with the 0.6-m robotic TRAPPIST telescope 
of Liege University, which is located 610 km from San Pedro.  Using a 
diffracting model, F. Braga-Ribas determined the times of immersion and 
emersion of the star.  The occultation lasted for 21.7 +/- 0.8 seconds, 
corresponding to a chord length of 573 +/- 21 km.  This result gives a 
lower limit to the diameter of the TNO, and can be compared to the 
estimated diameter from Stansberry et al. (2008, *Physical Properties of 
Kuiper Belt and Centaur Objects*, University of Arizona Press, pp. 
161ff; 685.8 +/- 95.5 km, based on Spitzer data) and Mueller et al. 
(2010, A.Ap. 518, L146; 910 +/- 60 km, based on Herschel data).

SUPERNOVA 2011I IN ESO 566-18 (Monard)
2011I   Jan   6.90  09 50 24.99  -21 51 45.1  15.8   1"E,    1  "N
J. L. Prieto, Carnegie Observatories, reports that optical spectrum
Jan. 13.4 UT suggests it is a normal type-Ia supernova then about 20 
days after maximum light

SUPERNOVA 2011J IN ANONYMOUS GALAXY (Catalina)
2011J   Jan   8.46  10 50 44.20  +28 00 49.0  18.8   1"N
J. L. Prieto, also reports a spectrum on Jan. 13.4 UT shows it is a 
type-Ia supernova then around maximum light.

SUPERNOVA 2011K IN ANONYMOUS GALAXY (Catalina)
2011K   Jan  13.19  04 45 30.38  -07 20 52.7  15.1   2" S
K. Ayani, Bisei Astronomical Observatory reports that low-resolution 
spectra obtained with the BAO 1.01-m telescope on Jan. 13.6 UT suggested 
it is a type-Ia supernova, then several days before maximum.

SUPERNOVA 2011L IN 2MASX J23401103+2725444 (ROTSE)
2011L   Jan  14.10  23 40 11.52  +27 25 42.2  17.0:  6.4"E,   2.2"S
A spectrum, taken on Jan. 15.07 UT with the 9.2-m Hobby-Eberly Telescope 
by J. Caldwell, shows it to be type-Ia then several days after maximum 
light.

SUPERNOVA 2011M IN UGC 3218 = PSN J05004155+6214386 (LOSS)
2011M   Jan  19.33  05 00 41.55  +62 14 38.6  18.2  14.6"W,   0.6"S
The type-Ia supernova 2006le also appeared in UGC 3218.
J. Parrent et. al., "Palomar Transient Factory" group report that a CCD 
spectrum of Jan. 22 UT shows it is a type-Ia then at five days before 
maximum light.

Guy M Hurst