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

Journal of Astronomical Instrumentation

K. KUEHN¹  R. HUPE² 

[1] Argonne National Laboratory, Lemont, IL 60439, USA;Department of Physics, The Ohio State University, Columbus, OH 43210, USA

关键词: Instrumentation;    interferometers;    techniques;    image processing;   

DOI  :  10.1142/S225117171550004X

学科分类：天文学(综合)

来源: World Scientific Publishing Co. Pte. Ltd.

【 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 13,000hr of all-sky images at frequencies between 10 and 88MHz creating opportunities for new research and discoveries. We also report rate density and pulse energy density limits on transients at 38, 52, and 74MHz, for pulse widths of 5s. We limit transients at those frequencies with pulse energy densities of >2.7×10−23, >1.1×10−23, and >2.8×10−23Jm−2Hz−1 to have rate densities <1.2×10−4, <5.6×10−4, and <7.2×10−4 year−1deg−2.

【 授权许可】

Unknown