ABSTRACT We present a long term optical R band light-curve analysis of the gravitationally lensed blazar AO 0235+164 in time span 1982–2019. Several methods lead to result that there is periodicity ∼8.13 yr these data. In addition, each five major flares are apparently double-peaked, with secondary peak following primary one by ∼2 yr. Along well-known system, OJ 287, our finding constitutes mos...

Abstract The spectral energy distributions (SEDs) of some blazars exhibit an ultraviolet (UV) and/or soft X-ray excess that can be modeled with different radiation mechanisms. Polarization measurements the UV/X-ray emission from may provide new and unique information about astrophysical environment blazar jets, could thus help to distinguish between scenarios. In this paper, a Monte Carlo code—...

We present results of two-colour photometry with high time resolution of the violently variable BL Lac object AO 0235+164. We have found extreme intranight variability with amplitudes of ∼ 100% over time scales of 24 hours. Changes of 0.5 magnitudes in both R and V bands were measured within a single night, and variations up to 1.2 magnitudes occurred from night to night. A complete outburst wi...

A connected dominating set in a graph is a subset of vertices such that every vertex is either in the subset or adjacent to a vertex in the subset and the subgraph induced by the subset is connected. The minimum connected dominating set is such a vertex subset with minimum cardinality. An application in ad hoc wireless networks requires the study of the minimum connected dominating set in unit-...

Kabin Kanjamapornkul, ∗ Richard Pinčák, 3, † Sanphet Chunithpaisan, ‡ and Erik Bartoš § Department of Computer Engineering, Faculty of Engineering, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovak Republic Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Resear...