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THE ASTRONOMER Electronic Circular No 2726      2011 Mar 30 06.58UT
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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SUPERNOVA 2011az IN IC 3862 = PSN J12535343+3605193
Further to TA E-Circular 2722, D. K. Sahu et. al., Indian Institute of 
Astrophysics, Bangalore, report on CBET 2680 that PSN J12535343+3605193 
= 2011az is a young type-IIP supernova.

A medium-resolution spectrum (wavelength range 350-920 nm) of 2011az, 
obtained on 2011 Mar. 21.93 UT with the Himalayan Chandra Telescope (+ 
HFOSC) at the Indian Astronomical Observatory, exhibits a blue continuum 
with a broad H_alpha line.  Using the SNID code (Blondin and Tonry 2007, 
Ap.J. 666, 1024), the spectrum of 2011az is found to be most similar to 
that of SN 1999em around 1.0 day before maximum.  The H-alpha absorption 
indicates an expansion velocity of about 12000 km/s, corrected for the 
host galaxy's redshift, estimated as z = 0.014 from the shift of the 
narrow Balmer emission lines in the spectrum.

Congratulations to Maurice Gavin on the discovery of his first 
supernova.

Guy M Hurst