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THE ASTRONOMER Electronic Circular No 3170      2016 May 24 09.18UT
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-16FJ: PROBABLE SUPERNOVA in IC 1289 (=AT 2016CMN)

I. Cruz, (Cruz Observatory) et. al. report on ATEL 9073 that during the
ongoing All Sky Automated Survey for SuperNovae (ASAS-SN), using data from
the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, they discovered
a new transient source, most likely a supernova, in the galaxy IC 1289. 

It was discovered in images obtained of 2016 May 20.54 at V~16.4 mag. They
did not detect (V>16.8) the object in images taken on UT 2016 May 18.43UT
and before. It was confirmed on 2016 May 21 by I. Cruz and J. Brimacombe.

The figure at: 
www.astronomy.ohio-state.edu/~assassin/followup/asassn-16fj.png
shows the archival DSS image of the host (left) and the J. Brimacombe
confirmation image (right). The red circle has a radius of 5" and is centred
on the position of the transient in the J. Brimacombe image. 

The position of ASASSN-16fj is approximately 3.8" north and 1.1" east from
the centre of IC 1289 (z=0.018313, d=74.6 Mpc, via NED), giving an absolute
V-band magnitude of approximately -18.2 (m-M=34.32, A_V=0.169).
Properties of the new source and photometry are:

Object       RA (J2000)   DEC (J2000)  Disc. UT Date   Disc. V mag
ASASSN-16fj  18:30:02.38  +39:57:54.31 2016-05-20.54     16.4  

Follow-up observations are encouraged. 

While we are participating in the TNS system to minimize potential
confusion, ASAS-SN will continue using ASASSN-16xx transient names as our
primary nomenclature (including supernovae, but also other classes of
transients), and we encourage others to do the same. We prefer merging the
names as ASASSN-16xx (AT2016xyz) to preserve, rather than anonymize, the
origin of the transient. 

Guy M Hurst