Polarization and photometric observations of the gamma-ray blazar PG 1553+113
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 HESS and MAGIC γ-ray Cherenkov telescopes. Our high-temporal resolution data show significant variations...
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Published in | Astronomy and astrophysics (Berlin) Vol. 531; p. A38 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Les Ulis
EDP Sciences
01.07.2011
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Subjects | |
Online Access | Get full text |
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Summary: | 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 HESS and MAGIC γ-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 γ-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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Bibliography: | Based on observations collected at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck Institut für Astronomie and the Instituto de Astrofísica de Andalucía (CSIC). e-mail: andru@fcaglp.unlp.edu.ar publisher-ID:aa16009-10 dkey:10.1051/0004-6361/201016009 istex:D329907561599C7254701E4360E2D832B4D17B78 ark:/67375/80W-XG3Q0C9S-X bibcode:2011A%26A...531A..38A |
ISSN: | 0004-6361 1432-0746 |
DOI: | 10.1051/0004-6361/201016009 |