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It has been claimed that the nova-like cataclysmic variable (CV) AE Aquarii(AE Aqr) is a very-high-energy (VHE, $E>$100 GeV) source both on observationaland theoretical grounds. We aim to search for VHE gamma-ray emission from AEAqr during different states of the source at several wavelengths to confirm orrule out previous claims of detection of gamma-ray emission from this object.We report on observations of AE Aqr performed by MAGIC. The source was observedduring 12 hours as part of a multiwavelength campaign carried out between Mayand June 2012 covering the optical, X-ray, and gamma-ray ranges. Besides MAGIC,the other facilities involved were the KVA, Skinakas, and Vidojevica telescopesin the optical and Swift in X-rays. We calculated integral upper limitscoincident with different states of the source in the optical. We computedupper limits to the pulsed emission limiting the signal region to 30% of thephaseogram and we also searched for pulsed emission at different frequenciesapplying the Rayleigh test. AE Aqr was not detected at VHE energies during themultiwavelength campaign. We establish integral upper limits at the 95\%confidence level for the steady emission assuming the differential fluxproportional to a power-law function d\phi/dE \propto E^{-Gamma}, with aCrab-like photon spectral index of Gamma=2.6. The upper limit above 200 GeV is6.4\times10^{-12} cm^{-2}s^{-1} and above 1 TeV is 7.4\times10^{-13}cm^{-2}s^{-1}. We obtained an upper limit for the pulsed emission of2.6\times10^{-12} cm^{-2}s^{-1} for energies above 200 GeV. Applying theRayleigh test for pulsed emission at different frequencies we did not find anysignificant signal. Our results indicate that AE Aqr is not a VHE gamma-rayemitter at the level of emission previously claimed. We have established themost constraining upper limits for the VHE gamma-ray emission of AE Aqr.

MAGIC search for VHE $\gamma$-ray emission from AE Aquarii in a multiwavelength context