2007/07/17 by Sergio A. Cellone, S. A. Cellone, Gustavo E. Romero +4 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2007.00366.x
published as MNRAS (Letters) 381 (2007) L60-L64. · Accepted by MNRAS (Letters), 5 pages
arxiv created 2007/07/17 · openalex publication_date 2007/09/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract We present optical photopolarimetric observations with high temporal resolution of the blazar AO0235+164. Our data, the first to test the photopolarimetric behaviour of this object at very short time-scales, show significant micro-variability in total flux, colour index, linear polarization degree and position angle. Strong inter-night variations are also detected for these parameters. Although no correlation between colour index and total flux was found, our data seem to support the general bluer-when-brighter trend already known for this object. The polarization degree, in turn, shows no correlation with total flux, but a clear trend in the sense that colour index is redder (the spectrum is softer) when the measured polarization is higher.