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arXiv 1503.05150astro-ph.IM
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使用LWA1上的原型全天空成像仪监测天空

Monitoring the Sky with the Prototype All-Sky Imager on the LWA1

K. S. Obenberger, G. B. Taylor, J. M. Hartman, T. E. Clarke, J. Dowell, A. Dubois, D. Dubois, P. A. Henning, J. Lazio, S. Michalak, F. K. Schinzel

摘要:

我们提出了一个描述的原型全天空成像仪(PASI),后端相关器和成像仪的第一站的长波长阵列(LWA 1)。PASI将LWA 1的260个双极化偶极天线的实时流进行交叉相关,创建全天空图像,并将其近实时上传到LWA-TV网站。PASI已经记录了超过13,000小时的全天空图像,频率在10到88 MHz之间,为新的研究和发现创造了机会。我们还报告了38、52和74 MHz(脉冲宽度为5 s)下瞬态的速率密度和脉冲能量密度限制。我们在脉冲能量密度为$>2.7\times 10^{-23}$、$>1.1\times 10^{-23}$和$>2.8\times 10^{-23}$ J m $^{-2}$ Hz $^{-1}$的频率下限制瞬态,使其具有速率密度$<1.2\times10^{-4}$、$<5.6\times10^{-4}$和$<7.2\times10^{-4}$ yr $^{-1}$ deg $^{-2}$

英文摘要:

We present a description of the Prototype All-Sky Imager (PASI), a backend correlator and imager of the first station of the Long Wavelength Array (LWA1). PASI cross-correlates a live stream of 260 dual-polarization dipole antennas of the LWA1, creates all-sky images, and uploads them to the LWA-TV website in near real-time. PASI has recorded over 13,000 hours of all-sky images at frequencies between 10 and 88 MHz creating opportunities for new research and discoveries. We also report rate density and pulse energy density limits on transients at 38, 52, and 74 MHz, for pulse widths of 5 s. We limit transients at those frequencies with pulse energy densities of $>2.7\times 10^{-23}$, $>1.1\times 10^{-23}$, and $>2.8\times 10^{-23}$ J m$^{-2}$ Hz$^{-1}$ to have rate densities $<1.2\times10^{-4}$, $<5.6\times10^{-4}$, and $<7.2\times10^{-4}$ yr$^{-1}$ deg$^{-2}$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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