Detection of an optical flare from PKS 1222+216 (4C 21.35)

Details Detection of an optical flare from PKS 1222+216 (4C 21.35) Detection of an optical flare from PKS 1222+216 (4C 21.35)

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2436....1h&link_type=abstract

The Astronomer's Telegram, #2436

Astronomy and Astrophysics

Astronomy

1

Optical, Gamma Ray, >Gev, Request For Observations, Agn, Quasars

Scientific paper

Most recent measurement with the Automatic Telescope for Optical Monitoring (ATOM), operated by the H.E.S.S. collaboration and located next to the H.E.S.S. IACT array in Namibia, shows significant optical flaring activity of the gamma-bright blazar PKS 1222+216 (4C 21.35) (RA=12:24:54.5, Dec=+21:39:23.2 (J2000), z=0.43). The source was fainter than 16mag (R) in the second half of 2008. It showed a minor flare up to R=15.7mag in April 09, followed by a dimming to R=16.0mag in May 2009.

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