12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room F(201/202/203/204)

[GA179] X-ray/gamma-ray flux correlations in the BL Lacs Mrk 421 and Mrk 501 using HAWC data


  • María Magdalena GONZÁLEZ

Primary authors


The HAWC gamma ray observatory is located at the Sierra Negra Volcano in Puebla, Mexico at an altitude of 4,100 meters. HAWC is a wide field of view array of 300 water Cherenkov detectors that are continuously surveying ~ 2sr of the sky, operating since March 2015. The large collected data sample allows HAWC to perform an unbiased monitoring of the BL Lacs Mrk 421 and Mrk 501. These are the closest and brightest known extragalactic high-synchrotron peaked BL Lacs in the gamma-ray/X-ray bands and are extensively monitored by the Large Area Telescope (LAT) on-board the Fermi satellite, and the BAT and XRT instruments of the Swift satellite. In this work, we use 21 months of HAWC data together with the Fermi-LAT, Swift-BAT and Swift-XRT data to characterize potential correlations. The results are discussed in terms of standard scenarios that could explain variations of physical parameters such as the magnetic field or the electron density.