نتایج جستجو برای: 501
تعداد نتایج: 3855 فیلتر نتایج به سال:
We report on the γ -ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average Large Area Telescope (LAT) γ -ray spectrum of Mrk 501 can be well described by a single power-law function with a photon index of 1.78 ± 0.03. While we observe relatively mild flux variations with the Fermi-LAT (within less than a factor of two), we detect remarkable spe...
Let G denote a locally compact abelian topological group (an l.c.a. group) with dual group C\ We will denote by A7(G) the Banach algebra of bounded regular Borel measures on G under convolution multiplication and by L(G) the algebra of bounded measures absolutely continuous with respect to Haar measure on G (for discussions of these Banach algebras cf. [1], [2], and [5]). In this paper we shall...
We report on the γ-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average LAT γ-ray spectrum of Mrk 501 can be well described by a single power-law function with a photon index of 1.78±0.03. While we observe relatively mild flux variations with the Fermi -LAT (within less than a factor of 2), we detect remarkable spectral variability where the ...
The TeV and X-ray data obtained by the imaging Cherenkov telescope CAT and X-ray satellite BeppoSAX during the remarkable flare of Mkn 501 in April 16, 1997 are used to constrain the flux of the Cosmic Infrared Background (CIB) using different CIB models. We show that a non-negligible absorption of γ-rays due to the CIB could take place already in the low-energy (sub-TeV) domain of the spectrum...
Introduction: Pharmacists have been recognized as essential healthcare professionals during the COVID-19 pandemic. However, evidence of challenges that were faced by profession and way pharmacists adapted their roles throughout pandemic are largely unknown. This study aimed to describe impact on pharmacy practice around world. Method: A cross-sectional online questionnaire with who provided dir...
Hepatitis C Virus (HCV) encodes two envelope glycoproteins, E1 and E2. Our previous work selected a specific aptamer ZE2, which could bind to E2 with high affinity, with a great potential for developing new molecular probes as an early diagnostic reagents or therapeutic drugs targeting HCV. In this study, the binding sites between E2 and aptamer ZE2 were further explored. E2 was truncated to 15...
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