MAGIC detection of increased flux from 1ES 0647+250 at very-high-energy gamma rays
ATel #13331; Razmik Mirzoyan (Max-Planck-Institute for Physics, Munich), on behalf of the MAGIC collaboration
on 5 Dec 2019; 15:05 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Daniela Dorner (dorner@astro.uni-wuerzburg.de)
Subjects: Gamma Ray, TeV, VHE, AGN, Blazar, Transient
Referred to by ATel #: 14268
The MAGIC telescopes have observed an increased flux at very-high-energy (VHE; >100 GeV) gamma rays from a position compatible with the blazar 1ES0647+250 (RA=06 50 46.49, Dec=+25 02 59.62, J2000.0). Following up a high flux in X-rays (ATel #13324), MAGIC observed the source for a total of 3 hours on 2019/12/02 (MJD 58820.16 to 58820.21) and 2019/12/04 (MJD 58821.17 to 58821.23) in good observing and weather conditions. The observations resulted in the detection of the source with a significance higher than 5 sigma. The corresponding preliminary flux was estimated to about 10% of the flux of the Crab Nebula above 100 GeV.
Swift-XRT observations on 2019/12/03 and 2019/12/04 show a further increase of the flux compared to the one reported in ATel #13324, representing the highest flux measured by Swift-XRT so far.
MAGIC observations on 1ES0647+250 will continue during the next nights (weather permitting) and multi-wavelength observations are strongly encouraged. The MAGIC contact persons for these observations are R. Mirzoyan (Razmik.Mirzoyan@mpp.mpg.de), D. Dorner (dorner@astro.uni-wuerzburg.de) and G. Bonnoli (giacomo.bonnoli@unisi.it).
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.
