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THE ASTRONOMER Electronic Circular No 3172      2016 May 29 12.53UT
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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ASASSN-16FQ: PROBABLE SUPERNOVA IN MESSIER 66 (AT 2616COK)

G. Bock (Runaway Bay Observatory,Australia) reports on ATEL 9091 discovery
of a probable supernova of V=16.7 in Messier 66 during ASAS using data from
the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii.

It was discovered in images of 2016 May 28.30UT at V ~ 16.7 mag but absent
to 17.1 on May 24. Bock confirms the discovery of the transient. 
Images can be found at:
www.astronomy.ohio-state.edu/~assassin/followup/asassn-16fq.png

The archival DSS image of the host (left) and the G. Bock confirmation image
(right). The red circle has a radius of 10" and is centred on the position
of the transient in the G. Bock image.  

The position of ASASSN-16fq is approximately 69" from the centre of the
galaxy M66 (z=0.002425, d=10 Mpc, via NED), giving an absolute V-band
magnitude of approximately -13.4 (m-M=30, A_V=0.09). Properties of the new
source and photometry are summarised in the tables below:  

Object       RA (J2000)     DEC (J2000)   Disc. UT Date Disc. V mag
ASASSN-16fq  11:20:19.09    +12:58:57.2   2016-05-28.30      16.7  

Obs. UT Date         V mag  
2016-05-24.32        >17.1  
2016-05-28.30         16.7  

Follow-up observations are encouraged.  

Guy M Hurst