An optical flare of 4C 14.23 observed with the KANATA telescope
ATel #2246; M. Sasada, Y. Ikejiri, M. Yamanaka, H. Takahashi, M. Uemura, K. S. Kawabata, Y. Fukazawa, T. Ohsugi (Hiroshima University), M. Fukagawa (Osaka University) on behalf of the KANATA team
on 17 Oct 2009; 16:56 UT
Credential Certification: Hiromitsu Takahashi (hirotaka@hep01.hepl.hiroshima-u.ac.jp)
Subjects: Optical, AGN, Quasar
Referred to by ATel #: 2253
Following the Fermi/LAT detection of the gamma-ray flare from 4C 14.23
(ATEL #2243), we performed optical photopolarimetric observations with
the "KANATA" 1.5-m telescope at Higashi-Hiroshima Observatory.
Our preliminary analysis shows that the V and J-band magnitudes of 4C 14.23
were V=17.1+/-0.1 and J=14.7+/-0.1 on 15.8 (UT) Oct. 2009, respectively.
We adopted a nearby star at RA=07:25:20.93 and DEC=+14:25:03.9 (V=14.420
in NOMAD, J=13.485 in 2MASS) as the photometric reference. 4C 14.23 was
observed with V=17.75 in Large Quasar Astrometric Catalogue, and J=16.37 in
the 2MASS catalog. Our observation, hence, indicates that the object
is currently
in a flare in the optical region, as well as the gamma-ray region. The
polarimetric
observation of 4C 14.23 showed a high polarization of 13+/-2 % in the V-band
on 15.8 Oct.
We will continue the optical monitoring of this source.
