Aliu, E.Böttcher, M.Archambault, S.Arlen, T.Aune, T.2015-04-072015-04-072013Aliu, E. et al. 2013. Long term observations of B2 1215+30 with Veritas. Astrophysical journal, 779: Article no 92. [https://doi.org/10.1088/0004-637X/779/2/92]0004-637X1538-4357 (Online)http://hdl.handle.net/10394/13654https://doi.org/10.1088/0004-637X/779/2/92We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHEs; E > 100 GeV) by VERITAS with a significance of 8.9σ and showed clear variability on timescales larger than months. In 2011, the source was found to be in a relatively bright state and a power-law fit to the differential photon spectrum yields a spectral index of 3.6 ± 0.4stat ± 0.3syst with an integral flux above 200 GeV of (8.0 ± 0.9stat ± 3.2syst) × 10−12  cm−2 s−1. No short term variability could be detected during the bright state in 2011. Multi-wavelength data were obtained contemporaneously with the VERITAS observations in 2011 and cover optical (Super-LOTIS, MDM, Swift/UVOT), X-ray (Swift/XRT), and gamma-ray (Fermi-LAT) frequencies. These were used to construct the spectral energy distribution (SED) of B2 1215+30. A one-zone leptonic model is used to model the blazar emission and the results are compared to those of MAGIC from early 2011 and other VERITAS-detected blazars. The SED can be reproduced well with model parameters typical for VHE-detected BL Lac objects.enBL Lacertae objects: generalBL Lacertae objects: individual (B2 1215+30, VER J1217+301)Article