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THE ASTRONOMER Electronic Circular No 2753      2011 Jly 29 19.34UT
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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PKS 1510-089
M. Hauser, J.P.Lenain, S. Wagner (LSW Heidelberg), H. Hagen, (Sternwarte 
Hamburg) report on The Astronomer's Telegram 3509 that
following the bright flare in PKS 1510-089 reported by the AGILE and 
Fermi-LAT teams in ATel #3470 and Atel #3473 and reports on activities 
in the radio band (ATel #3500) the Automatic Telescope for Optical 
Monitoring (ATOM) recorded an increase in the optical flux of this 
object on 2011 July 24-25 and July 25-26 with R band magnitudes of 15.7 
and 15.3, respectively. Variations of 25% were recorded on a timescale 
of one hour.

In response to this alert, Guy Hurst obtain optical photometry of this 
ultra-fast quasar in V on 2011 July 29 at 04h40mUT using the Sierra 
Stars 0.60-m Cassegrain telescope. This gave V=16.65 +/- 0.05 using the 
sequence at:
http://www.lsw.uni-heidelberg.de/projects/extragalactic/charts/1510-089.h
tml
by Raiteri, Villata and Smith and reported from Heidelberg.
The result was, surprisingly from the recent outburst, one of the 
faintest magnitudes recorded by the editor since monitoring started 2009 
June.

Guy M Hurst