2013ApJ...779...92A

Query : 2013ApJ...779...92A

2013ApJ...779...92A - Astrophys. J., 779, 92 (2013/December-3)

Long term observations of B2 1215+30 with VERITAS.

ALIU E., ARCHAMBAULT S., ARLEN T., AUNE T., BEILICKE M., BENBOW W., BIRD R., BOUVIER A., BUCKLEY J.H., BUGAEV V., CESARINI A., CIUPIK L., CONNOLLY M.P., CUI W., DUMM J., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FORTIN P., FORTSON L., FURNISS A., GALANTE N., GERARD L., GILLANDERS G.H., GRIFFIN S., GRUBE J., GYUK G., HANNA D., HOLDER J., HUGHES G., HUMENSKY T.B., KAARET P., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., MADHAVAN A.S., MAIER G., MAJUMDAR P., McARTHUR S., McCANN A., MORIARTY P., MUKHERJEE R., NIETO D., DE BHROITHE A.O., ONG R.A., ORR M., OTTE A.N., PARK N., PERKINS J.S., POHL M., POPKOW A., PROKOPH H., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., RICHARDS G.T., ROACHE E., SAXON D.B., SEMBROSKI G.H., SKOLE C., SMITH A.W., SOARES-FURTADO M., STASZAK D., TELEZHINSKY I., TESIC G., THEILING M., VARLOTTA A., VASSILIEV V.V., VINCENT S., WAKELY S.P., WEEKES T.C., WEINSTEIN A., WELSING R., WILLIAMS D.A., ZITZER B. (The VERITAS Collaboration), BOTTCHER M., FUMAGALLI M. and JADHAV J.

Abstract (from CDS):

We 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)x10–12/cm2/s. 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.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general - BL Lacertae objects: individual (B2 1215+30, VER J1217+301)

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 887 1
2 QSO B0317+18 BLL 03 19 51.8082475320 +18 45 34.562475432     18.12     ~ 210 0
3 QSO B0414+009 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 286 0
4 ICRF J052145.9+211251 BLL 05 21 45.9657388992 +21 12 51.452786736           ~ 135 1
5 M 1 SNR 05 34 30.9 +22 00 53           ~ 6192 1
6 87GB 064555.8+152016 BLL 06 48 47.6488006968 +15 16 24.797585352       16.2   ~ 88 0
7 6C 070609+591309 BLL 07 10 30.0683697888 +59 08 20.371772544   17.38 16.52 15.1   ~ 231 2
8 7C 080602.89+522749.00 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 277 2
9 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2671 1
10 6C 121520+302351 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   ~ 478 1
11 QSO B1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 468 1
12 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 873 1
13 ICRF J122454.4+212246 Sy1 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 703 2
14 7C 1424+2401 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 366 1
15 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 625 2

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