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NIR brightening of the blazar PKS0458-02

ATEL # 2993; L. Carrasco, A. Carramiņana, E. Recillas, G. Escobedo, A. Porras, Y.D. Mayya, J.R. Valdes (INAOE, Mexico)
on 1 Nov 2010; 8:33 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: LUIS CARRASCO (

Subjects: Radio, Infra-Red, Optical, Gamma Ray, Request for Observations, AGN, Quasars

We report the ongoing NIR flare of the quasar PKS 0458-02 it is related with the radio source 4C-02.19, and it is likely associated with a gamma ray source CGRaBSJ0501-0159 and the radio source WMAPJ050118-0159. It is a high redshift FRSQSO z=2.286 (RA=05:01:12.81, DEC=-01:59:14.3, J2000).On October 31th,2010 (JD 2455500.97644), we determined the NIR flux from this object to correspond to H = 14.997 +/-0.04, than is 1.7mag brighter than our previous observation on March 26th, 2010 (JD2455281.65087), when we determined it to have had H = 16.687 +/-0.08, that is an increase in flux of a factor of 5. Worth mentioning is the fact that, this source was not detected by the 2mass survey, with a limiting H magnitude for this field of H ~ 16.5. Given the present raise in flux of this source, we encourage further multi wavelength observations of this variable object.

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