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Acciari, VA,Aliu, E,Aune, T,Beilicke, M,Benbow, W,Bottcher, M,Bradbury, SM,Buckley, JH,Bugaev, V,Butt, Y,Cannon, A,Celik, O,Cesarini, A,Chow, YC,Ciupik, L,Cogan, P,Colin, P,Cui, W,Dickherber, R,Duke, C,Falcone, AD,Fegan, SJ,Finley, JP,Finnegan, G,Fortin, P,Fortson, L,Furniss, A,Gall, D,Gillanders, GH,Grube, J,Guenette, R,Gyuk, G,Hanna, D,Holder, J,Horan, D,Hui, CM,Humensky, TB,Kaaret, P,Karlsson, N,Kertzman, M,Kieda, D,Kildea, J,Konopelko, A,Krawczynski, H,Krennrich, F,Lang, MJ,LeBohec, S,Maier, G,McCann, A,Millis, J,Moriarty, P,Ong, RA,Otte, AN,Pandel, D,Perkins, JS,Pichel, A,Pohl, M,Quinn, J,Ragan, K,Reyes, LC,Reynolds, PT,Roache, E,Rose, HJ,Schroedter, M,Sembroski, GH,Smith, AW,Steele, D,Swordy, SP,Theiling, M,Toner, JA,Varlotta, A,Vincent, S,Wakely, SP,Ward, JE,Weekes, TC,Weinstein, A
2009
September
Astrophysical Journal
SIMULTANEOUS MULTIWAVELENGTH OBSERVATIONS OF MARKARIAN 421 DURING OUTBURST
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()
Optional Fields
BL Lacertae objects: individual (Markarian 421) galaxies: active gamma rays: observations radiation mechanisms: non-thermal X-rays: galaxies ACTIVE GALAXY MARKARIAN-421 RAY SPECTRAL VARIABILITY XMM-NEWTON CORRELATED VARIABILITY MAGIC TELESCOPE GALACTIC NUCLEI TEV PHOTONS GAMMA-RAYS ENERGY RADIATION
703
169
178
We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, while the gamma-ray data were obtained utilizing three imaging atmospheric Cerenkov telescopes, the Whipple 10 m telescope and VERITAS, both based in Arizona, as well as the MAGIC telescope, based on La Palma in the Canary Islands. The coordinated effort between the gamma-ray groups allowed for truly simultaneous data in UV/X-ray/gamma-ray wavelengths during a significant portion of the XMM-Newton observations. This simultaneous coverage allowed for a reliable search for correlations between UV, X-ray, and gamma-ray variability over the course of the observations. Investigations of spectral hysteresis and modeling of the spectral energy distributions are also presented.
DOI 10.1088/0004-637X/703/1/169
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