Intensity of the cosmic X-ray backgound from HEAO1/A2 experiment
Intensity of the cosmic X-ray backgound from HEAO1/A2 experiment
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HEAO1/A2 实验的宇宙 X 射线背景强度
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
R. Sunyaev
中科院分区：
文献类型：
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作者：
M. Revnivtsev;M. Gilfanov;K. Jahoda;R. Sunyaev
我们重新分析了HEAO1/A2--宇宙X射线实验--的数据，以便重复宇宙X射线背景(CXB)强度的测量，并将该值与CXB的其他测量结果进行准确比较。我们在扫描模式下使用了MED、HED1和HED3探测器的数据，这使得我们能够在测量CXB强度的相同模式下自洽地测量探测器的有效立体角和有效面积。结果表明，在能带2−10keV，CXB强度平均值为1.96±0.10×10−11erg−1 cm−2 deg−2，在1keV能区，CxB强度平均值为9.7±0.5phot−−1 cm−2，在该能带内呈幂指数谱形状，光子指数Γ=1.4。我们将获得的测量结果与过去几十年不同仪器获得的结果进行了比较。
We reanalyze data of HEAO1/A2 – the Cosmic X-ray Experiment – in order to repeat the measurements of the cosmic X-ray background (CXB) intensity and accurately compare this value with other measurements of the CXB. We used the data of MED, HED1, and HED3 detectors in scan mode, which allowed us to measure effective solid angles and effective areas of detectors self consistently, in the same mode as the CXB intensity was measured. We found that the average value of the CXB intensity is 1.96 ± 0.10 × 10 −11 erg s −1 cm −2 deg −2 in the energy band 2−10 keV, or 9.7 ± 0.5 phot s −1 cm −2 at 1 keV assuming the power law spectral shape with photon index Γ= 1.4 in this energy band. We compare the obtained measurements with those obtained by different instruments over the past few decades.