2014ApJ...788..158A

Query : 2014ApJ...788..158A

2014ApJ...788..158A - Astrophys. J., 788, 158 (2014/June-3)

Test of models of the cosmic infrared background with multiwavelength observations of the blazar 1ES 1218+30.4 in 2009.

ARCHAMBAULT S., ARLEN T., AUNE T., BEILICKE M., BENBOW W., BIRD R., BOTTCHER M., BOUVIER A., BUCKLEY J.H., BUGAEV V., CIUPIK L., COLLINS-HUGHES E., CONNOLLY M.P., CUI W., DICKHERBER R., DUMM J., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FORTSON L., FURNISS A., GALANTE N., GALL D., GARSON III A., GILLANDERS G.H., GRIFFIN S., GRUBE J., GUSBAR C., GYUK G., HANNA D., HOLDER J., HUGHES G., KAARET P., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., LAMERATO A., LANG M.J., LI K., MADHAVAN A.S., MAIER G., MAJUMDAR P., McARTHUR S., McCANN A., MILLIS J., MORIARTY P., MUKHERJEE R., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., ORR M., OTTE A.N., PARK N., PERKINS J.S., POHL M., POPKOW A., PROKOPH H., QUINN J., RAGAN K., REYNOLDS P.T., RICHARDS G.T., ROACHE E., ROUSTAZADEH P., SAXON D.B., SEMBROSKI G.H., SENTURK G.D., SKOLE C., STASZAK D., TELEZHINSKY I., TESIC G., THEILING M., VARLOTTA A., VASSILIEV V.V., VINCENT S., WAKELY S.P., WEINSTEIN A., WELSING R., WILLIAMS D.A. and ZITZER B.

Abstract (from CDS):

We present the results of a multi-wavelength campaign targeting the blazar 1ES 1218+30.4 with observations with the 1.3 m McGraw-Hill optical telescope, the Rossi X-ray Timing Explorer (RXTE), the Fermi Gamma-Ray Space Telescope, and the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The RXTE and VERITAS observations were spread over a 13 day period and revealed clear evidence for flux variability, and a strong X-ray and γ-ray flare on 2009 February 26 (MJD 54888). The campaign delivered a well-sampled broadband energy spectrum with simultaneous RXTE and VERITAS very high energy (VHE, >100 GeV) observations, as well as contemporaneous optical and Fermi observations. The 1ES 1218+30.4 broadband energy spectrum–the first with simultaneous X-ray and VHE γ-ray energy spectra–is of particular interest as the source is located at a high cosmological redshift for a VHE source (z = 0.182), leading to strong absorption of VHE gamma rays by photons from the optical/infrared extragalactic background light (EBL) via γVHE+ γEBL⟶ e + e – pair-creation processes. We model the data with a one-zone synchrotron self-Compton (SSC) emission model and with the extragalactic absorption predicted by several recent EBL models. We find that the observations are consistent with the SSC scenario and all the EBL models considered in this work. We discuss observational and theoretical avenues to improve on the EBL constraints.

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Journal keyword(s): BL Lacertae objects: general - BL Lacertae objects: individual: 1ES1218+30.4 - cosmic background radiation - diffuse radiation - galaxies: jets - gamma rays: galaxies

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 RX J0232.8+2017 BLL 02 32 48.6148874688 +20 17 17.486717388     18.00 13.96   ~ 387 1
2 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
3 PMN J1103-2329 BLL 11 03 37.6150845072 -23 29 31.203773520   17.00 16.55 16.61   ~ 405 1
4 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
5 PG 1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 497 1
6 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
7 RX J1428.5+4240 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 549 1
8 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
9 QSO B2356-309 BLL 23 59 07.9034996184 -30 37 40.671098544   18.414 16.44 16.795   ~ 318 2

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