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NIR Flaring of PKS1222+216

ATel #2626; L. Carrasco, A. Carramiñana ,E. Recillas, A. Porras, D. Y. Mayya (INAOE. Mexico)
on 19 May 2010; 11:26 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Infra-Red, Gamma Ray, AGN, Blazar, Quasar

Referred to by ATel #: 2641, 2684

We report on a NIR flux increase of the source PKS1222+216. also known as 4C21.35 on April 20,2010 JD2455306.86. On this date the source was found to have a flux corresponding to H = 12.707 +/- 0.05. This flux is a factor of 2.3 times the flux observed on March 20,2010. The source was observed again on May 4,2010 (JD24555320.75) when the flux had decreased to a level corresponding to a magnitude H = 13.301 +/- 0.05. We encourage further multiwavelength observations. The source has been also reported to have recent flaring activity in gamma rays, see ATELs #2584 and #2617.