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MAGIC detects very high energy gamma-ray emission from the blazar OT 081 (PKS 1749+096, 4C +09.57)

The MAGIC collaboration reports on the detection of very high energy (VHE ; E>150 GeV) gamma-ray emission from OT 081 (RA=17 51 32.82, dec=+09 39 00.73, J2000.0 ; also known as PKS 1749+096 and 4C +09.57). OT 081 is a blazar at a red shift of 0.322 (Stickel, Fried, Kuehr 1988, A&A, 191, 16). The preliminary analysis of the MAGIC data taken on 2016 Jul. 24 (observation time: 1.64 hours) resulted in the detection of OT 081 with a statistical significance of 9 standard deviations. From the preliminary analysis, we estimate the VHE flux of this detection is about 8% of the flux from the Crab Nebula in the energy range above 150 GeV. The MAGIC observations were triggered by the observations in the high energy gamma-ray band by the Fermi-LAT, and X-ray and UV Swift (ATel #9260), an optical band flux increase observed by the MAGIC collaboration with a 35cm Celestron telescope at La Palma, and optical observations from other observatories (ATel #9259). MAGIC observations of OT 081 will continue during the following nights, and multi-wavelength observations are encouraged. The MAGIC contact persons for these observations are R. Mirzoyan (Razmik.Mirzoyan@mpp.mpg.de) and D. Dominis Prester (dijana@phy.uniri.hr). MAGIC is a system of two 17m-diameter Imaging Atmospheric Cherenkov Telescopes located at the Canary island of La Palma, Spain, and designed to perform gamma-ray astronomy in the energy range from 50 GeV to greater than 50 TeV.

Gamma Ray ; TeV ; VHE ; Blazar

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