TY - JOUR
T1 - Detection of new Extreme BL Lac objects with H.E.S.S. and Swift XRT
AU - H.E.S.S. Collaboration
AU - Abdalla, H.
AU - Aharonian, F.
AU - Ait Benkhali, F.
AU - Angüner, E. O.
AU - Arcaro, C.
AU - Armand, C.
AU - Armstrong, T.
AU - Ashkar, H.
AU - Backes, M.
AU - Baghmanyan, V.
AU - Barbosa Martins, V.
AU - Barnacka, A.
AU - Barnard, M.
AU - Batzofin, R.
AU - Becherini, Y.
AU - Berge, D.
AU - Bernlöhr, K.
AU - Bi, B.
AU - Böttcher, M.
AU - Boisson, C.
AU - Bolmont, J.
AU - de Bony de Lavergne, Mathieu
AU - Breuhaus, M.
AU - Brose, R.
AU - Brun, F.
AU - Bulik, T.
AU - Bylund, Tomas
AU - Cangemi, F.
AU - Caroff, S.
AU - Casanova, S.
AU - Catalano, J.
AU - Chambery, P.
AU - Chand, T.
AU - Chen, A.
AU - Cotter, G.
AU - Curyło, M.
AU - Dalgleish, H.
AU - Damascene Mbarubucyeye, J.
AU - Davids, I. D.
AU - Davies, J.
AU - Devin, J.
AU - Djannati-Ataï, A.
AU - Dmytriiev, A.
AU - Donath, A.
AU - Doroshenko, V.
AU - Dreyer, L.
AU - Du Plessis, L.
AU - Duffy, C.
AU - Egberts, K.
AU - Fegan, S.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
PY - 2022/3/18
Y1 - 2022/3/18
N2 - Extreme high synchrotron peaked blazars (EHBLs) are amongst the most powerful accelerators found in nature. Usually the synchrotron peak frequency of an EHBL is above 1017 Hz, i.e., lies in the range of medium to hard X-rays making them ideal sources to study particle acceleration and radiative processes. EHBL objects are commonly observed at energies beyond several TeV, making them also powerful probes of gamma-ray absorption in the intergalactic medium. During the last decade, several attempts have been made to increase the number of EHBL detected at TeV energies and probe their spectral characteristics. Here we report new detections of EHBLs in the TeV energy regime, each at a redshift of less than 0.2, by the High Energy Stereoscopic System (H.E.S.S.). Also, we report on X-ray observations of these EHBLs candidates with Swift XRT. In conjunction with the very high energy observations, this allows us to probe the radiation mechanisms and the underlying particle acceleration processes.
AB - Extreme high synchrotron peaked blazars (EHBLs) are amongst the most powerful accelerators found in nature. Usually the synchrotron peak frequency of an EHBL is above 1017 Hz, i.e., lies in the range of medium to hard X-rays making them ideal sources to study particle acceleration and radiative processes. EHBL objects are commonly observed at energies beyond several TeV, making them also powerful probes of gamma-ray absorption in the intergalactic medium. During the last decade, several attempts have been made to increase the number of EHBL detected at TeV energies and probe their spectral characteristics. Here we report new detections of EHBLs in the TeV energy regime, each at a redshift of less than 0.2, by the High Energy Stereoscopic System (H.E.S.S.). Also, we report on X-ray observations of these EHBLs candidates with Swift XRT. In conjunction with the very high energy observations, this allows us to probe the radiation mechanisms and the underlying particle acceleration processes.
M3 - Conference article
AN - SCOPUS:85145009610
SN - 1824-8039
VL - 395
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 823
T2 - 37th International Cosmic Ray Conference, ICRC 2021
Y2 - 12 July 2021 through 23 July 2021
ER -