Investigating the Puzzling Synchrotron Behaviour of Mrk 421

• Main Authors: Carnerero, Maria, Raiteri, Claudia, Villata, Massimo, Acosta Pulido, Jose, Smith, Paul, Larionov, Valeri
• Other Authors: Univ Arizona, Steward Observ
• Language: en
• Published: MDPI AG 2016
• Subjects: galaxies: active; BL Lacertae objects: general; BL Lacertae objects: individual: Mrk 421; galaxies: jets
• Online Access: http://hdl.handle.net/10150/622694; http://arizona.openrepository.com/arizona/handle/10150/622694

We investigate the multiwavelength behaviour of the high-energy peaked BL Lac object (HBL) Mrk 421 at redshift z = 0.031 in the period 2007-2015. We use optical photometric, spectroscopic, and polarimetric data and near-infrared data obtained by 35 observatories participating in the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT), as well as by the Steward Observatory Support of the Fermi Mission. We also employ high-energy data from the Swift (UV and X-rays) satellite to study correlations among emission in different bands.