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Polarization and photometric observations of the gamma-ray blazar PG 1553+113

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arxiv 1105.3482 v1 pith:FKYJUFIX submitted 2011-05-17 astro-ph.HE

I. Andruchow , J. A. Combi , A. J. Muñoz-Arjonilla , G. E. Romero , S. A. Cellone , J. Martí This is my paper · ORCID
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keywords blazargamma-raypolarizationangledifferentialopticalphotometrysignificant
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We present the results of an observational photo-polarimetry campaign of the blazar PG 1553+113 at optical wavelengths. The blazar was recently detected at very high energies (> 100 GeV) by the H.E.S.S and MAGIC gamma-ray Cherenkov telescopes. Our high-temporal resolution data show significant variations in the linear polarization percentage and position angle at inter-night time-scales, while at shorter (intra-night) time-scales both parameters varied less significantly, if at all. Changes in the polarization angle seem to be common in gamma-ray emitting blazars. Simultaneous differential photometry (through the B and R bands) shows no significant variability in the total optical flux. We provide B and R magnitudes, along with a finding chart, for a set of field stars suitable for differential photometry.

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