Prospects for Very High Energy Blazar Survey by the Next Generation Cherenkov Telescopes
Prospects for Very High Energy Blazar Survey by the Next Generation Cherenkov Telescopes
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下一代切伦科夫望远镜进行甚高能耀变体巡天的前景
DOI：
10.1093/pasj/62.4.1005
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发表时间：
2010
影响因子：
2.3
通讯作者：
Masaki Mori
中科院分区：
文献类型：
--
作者：
Yoshiyuki Inoue;Tomonori Totani;Masaki Mori
The prospects for future blazar surveys by next-generation very high-energy (VHE) gamma-ray telescopes, such as Advanced Gamma-ray Imaging System (AGIS) and Cherenkov Telescope Array (CTA), are investigated using the latest model of blazar luminosity function and its evolution, which is in good agreement with the flux and redshift distribution of observed blazars as well as the extragalactic gamma-ray background. We extend and improve the template of spectral energy distributions (SEDs) based on the blazar SED sequence paradigm, to make it reliable also in the VHE bands (above 100 GeV) by comparing with the existing VHE blazar data. Assuming the planned CTA sensitivities, a blind survey using a total survey time of100 hr could detect3 VHE blazars, with larger expected numbers for wider/shallower surveys. We also discuss a following-up ofFermiblazars. The detectability of VHE blazars in the plane of theFermiflux and redshift is presented, which would be useful for future survey planning. Prospects and strategies are discussed to constrain the extragalactic background light (EBL) by using the absorption feature of brightest blazar spectra, as well as cut-offs in the redshift distribution. We will be able to get useful constraints on EBL by VHE blazars at different redshifts ranging 0.3–1 TeV corresponding to0.10–0.36.
