RGB J2243+203 is a blazar at an estimated redshift of greater than 0.39 that has been classified both as an intermediate-frequency-peaked BL Lac object and as a high-frequency-peaked BL Lac object .
This source has been detected by VERITAS at a statistical significance of 5.6 \sigma in \sim 4 hours between 21 Dec 2014 UTC ( 57012 MJD ) and 24 Dec 2014 UTC ( 57015 MJD ) .
An integral flux of 2.03 \pm 0.54 \times 10 ^ { -11 } \textrm { cm } ^ { -2 } \textrm { s } ^ { -1 } has been observed above 160 GeV .
The gamma-ray spectrum can be described as a simple power-law spectrum with spectral index of -4.64 \pm 0.56 .
VERITAS measurements are complemented by quasi-simultaneous Fermi -LAT and Swift- XRT observations , in the energy ranges of 1-100 GeV and 2-10 keV , respectively .
During the three day time period of VERITAS observations , an increased flux level at 1-100 GeV energies was detected compared to the flux from the first four years of Fermi -LAT observations .
The Swift -XRT observations were taken 2.8 days after this period , and the integral X-ray flux in the energy range 0.3-10 keV is not significantly higher than a baseline flux from archival data .