I am very happy to announce this discovery as the first discovery that i was involved in.
The MAGIC collaboration reports the discovery of very high energy (VHE; E>100 GeV) gamma-ray emission from the BL Lac S2 0109+22 (z=0.265 RA: 01h12m05.8s Dec:+22d44m39s, J2000). The object was observed with the MAGIC telescopes for 5.3 hours from 2015/07/22 to 2015/07/25. The preliminary analysis of the first three nights of MAGIC data showed an excess with a statistical significance of ~5 standard deviations. The VHE flux of this detection was estimated to be (1.6+/-0.7)e-11 ph/cm2/s above 100 GeV, about 3% of the flux from the Crab nebula. The daily flux shows a marked enhancement on the night of 25 July up to (9.7+/-1.5)e-11 ph/cm^2/s, ~15% of the Crab flux at E>100 GeV, corresponding to an excess with >7 sigma statistical significance. S2 0109+22 is classified as an intermediate-synchrotron peaked BL Lac object. The multi-year optical and radio historical coverage showed optical variations with typical timescales from weeks to months.
See more:
http://www.astronomerstelegram.org/?read=7844
The MAGIC collaboration reports the discovery of very high energy (VHE; E>100 GeV) gamma-ray emission from the BL Lac S2 0109+22 (z=0.265 RA: 01h12m05.8s Dec:+22d44m39s, J2000). The object was observed with the MAGIC telescopes for 5.3 hours from 2015/07/22 to 2015/07/25. The preliminary analysis of the first three nights of MAGIC data showed an excess with a statistical significance of ~5 standard deviations. The VHE flux of this detection was estimated to be (1.6+/-0.7)e-11 ph/cm2/s above 100 GeV, about 3% of the flux from the Crab nebula. The daily flux shows a marked enhancement on the night of 25 July up to (9.7+/-1.5)e-11 ph/cm^2/s, ~15% of the Crab flux at E>100 GeV, corresponding to an excess with >7 sigma statistical significance. S2 0109+22 is classified as an intermediate-synchrotron peaked BL Lac object. The multi-year optical and radio historical coverage showed optical variations with typical timescales from weeks to months.
See more:
http://www.astronomerstelegram.org/?read=7844