-------------------------------------------------------------------
THE ASTRONOMER Electronic Circular No 3076      2015 May 11 19.02UT
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
-------------------------------------------------------------------
FLARE OF THE BLAZAR PKS1510-089
Guy Hurst, using the Bradford Robotic Telescope, recorded a bright phase of
the blazar PKS1510-089. On 2015 April 26.153UT, V photometry yielded
magnitude 15.07 whereas 2009 August to 2014 July gave results ranging from
16.1-16.7.

L. Carrasco et. al. (INACE, Mexico) also report NIR monitoring on The
Astronomer's Telegram 7466. They carried out a follow up NIR observations of
the intermediate redshift (z=0.36) quasar BZQJ1512-0905, associated with the
radio source PKS1510-089, cross identified with the gamma-ray source
2FGLJ1512.8-0906. On April 29th,2015 (JD2457141.9659), they found the source
with NIR fluxes corresponding to J = 13.139 +/- 0.04, H = 12.318 +/- 0.04
and Ks = 11.425 +/- 0.03. Their previous observation of this source
(JD2459123) yielded +fluxes corresponding to J = 13.932 =/- 0.03, H = 12.861
+/- 0.02 and Ks = 12.001 =/- 0.3. Hence, it has had a significant increase
(a factor ~2) in flux at NIR wavelengths in this 19 day lapse. Worth
mentioning is the fact that the object is brightest at NIR wavelengths since
the time we starting monitoring it on JD2454451.9. This object has shown
flare activity at other wavelengths in the past (see Atel#5416, Atel#5422).
Our observations are carried out with the 2.1m telescope of the Guillermo
Haro Observatory operated by the National Institute for Astrophysics, Optics
and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. 

They appeal for more observations at various wavelengths.

Guy M Hurst