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±0.4_stat± 0.3_syst with an integral flux above 200 GeV of (8.0±0.9_stat± 3.2_syst)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

Full paper

View the references in ADS

Number of rows : 15

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	3C 66A	BLL	02 22 39.6114771888	+43 02 07.799534304		15.71	15.21	14.5	~	942	2
2	RX J0319.8+1845	BLL	03 19 51.8082475320	+18 45 34.562475432					~	223	1
3	PMN J0416+0105	BLL	04 16 52.4945693352	+01 05 23.899102620		16.86	16.38	16	~	302	1
4	RX J0521.7+2112	BLL	05 21 45.9657388992	+21 12 51.452786736					~	162	1
5	M 1	SNR	05 34 31.8	+22 01 03					~	6516	1
6	RX J0648.7+1516	BLL	06 48 47.6488006968	+15 16 24.797585352				16.2	~	99	1
7	RX J0710.5+5908	BLL	07 10 30.0683697888	+59 08 20.371772544		17.38	16.52	15.1	~	249	1
8	RX J0809.8+5218	BLL	08 09 49.1868285744	+52 18 58.249938744		16.11	15.59	14.6	~	302	1
9	Z 184-50	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31	~	2841	1
10	RX J1217.8+3007	BLL	12 17 52.0819904040	+30 07 00.634936872		16.07	15.62	13.47	G7	516	1
11	PG 1218+304	BLL	12 21 21.9426947832	+30 10 37.158534012		16.50	15.85	15.7	~	497	1
12	7C 1219+2830	BLL	12 21 31.6904439888	+28 13 58.500308172		16.81	16.11	14.24	~	924	1
13	7C 122223.5+213929	Bla	12 24 54.4583146056	+21 22 46.385507388		17.56	17.50	18.2	~	770	2
14	PG 1424+240	BLL	14 27 00.3917926224	+23 48 00.037510776	14.52	14.34	14.95	14.5	~	420	1
15	QSO B1959+650	BLL	19 59 59.8520303688	+65 08 54.652536492			12.8	11.21	~	699	2

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