https://doi.org/10.1140/epjc/s10052-018-5954-2
Regular Article - Theoretical Physics
The nature of the intrinsic spectra from the VHE emission of H 2356-309 and 1ES 1101-232
1
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., A. Postal 70-543, 04510, Mexico, DF, Mexico
2
Astrophysical Big Bang Laboratory, RIKEN, Hirosawa, Wako, Saitama, 351-0198, Japan
3
Interdisciplinary Theoretical Science Research (iTHES), RIKEN, Hirosawa, Wako, Saitama, 351-0198, Japan
4
Interdisciplinary Theoretical and Mathematical Science (iTHEMS), RIKEN, Hirosawa, Wako, Saitama, 351-0198, Japan
* e-mail: sarira@nucleares.unam.mx
Received:
16
January
2018
Accepted:
31
May
2018
Published online:
11
June
2018
The VHE emission from the HBLs H 2356-309 and 1ES 1101-232 were observed by the HESS telescopes during 2004–2007. Particularly the observations in 2004 from H 2356-309 and during 2004–2005 from 1ES 1101-232 were analyzed to derive strong upper limits on the EBL, which were found to be consistent with the lower limits from the integrated light of resolved galaxies. Here we have used the photohadronic model corroborated by two template EBL models to fit the observed VHE gamma-ray data from these two HBLs and to predict their intrinsic spectra. We obtain very good fit to the VHE spectra of these two HBLs. However, the predicted intrinsic spectra are different for each EBL model. For the HBL H 2356-309, we obtain a flat intrinsic spectrum and for 1ES 1101-232 the spectrum is mildly harder than 2 but much softer than 1.5.
© The Author(s), 2018
