A bright near-IR state of the blazar 4C 38.41 (1633+382) observed by the GASP
ATel #5236; M. I. Carnerero (INAF, Osservatorio Astrofisico di Torino, Italy and Instituto de Astrofisica de Canarias, Spain and Departamento de Astrofisica, Universidad de La Laguna, Spain), C. M. Raiteri and M. Villata (INAF, Osservatorio Astrofisico di Torino, Italy), J. A. Acosta-Pulido (Instituto de Astrofisica de Canarias, Spain and Departamento de Astrofisica, Universidad de La Laguna, Spain), S. Velasco (Instituto de Astrofisica de Canarias, Spain), Pedro A. Gonzalez-Morales (Instituto de Astrofisica de Canarias, Spain), for the GASP Collaboration
on 30 Jul 2013; 10:11 UT
Credential Certification: Claudia M. Raiteri (raiteri@oato.inaf.it)
Subjects: Infra-Red, Blazar, Quasar
The flat-spectrum radio quasar 4C 38.41 (1633+382) is one of the 28 blazars for which the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) performs a long-term, multiwavelength monitoring.
With reference to ATels #5232 and #5234, reporting on the detection of a flare at gamma-rays, we present the results of near-IR observations carried out at the Teide Observatory, which reveal that the source is undergoing a long-lasting bright state.
Data acquired on 2013 June 14.94, 18.15, 28.97, 30.04, and 31.00 show the source at J=14.99, 14.76, 14.34, 14.27, and 14.37.
Observations performed on July 9.05, 11.01, 11.95, 16.04, 28.93, and 29.95 give J=14.26, 14.62, 14.62, 14.44, 14.26, and 14.27.
Typical uncertainties are 0.01 mag.
These values can be compared with the peak of the 2011 outburst, where J=13.59 was observed on July 12 (Raiteri et al. 2012, A&A, 545, A48).
