CHIME/FRB Outriggers: KKO Station System and Commissioning Results

CHIME/FRB Outriggers: KKO Station System and Commissioning Results

May 30, 2024 | Adam E. Lanman, Shion Andrew, Mattias Lazda, Vishwangi Shah, Mandana Amiri, Arvind Balasubramanian, Kevin Bandura, P. J. Boyle, Charanjot Brar, Mark Carlson, Jean-François Cliche, Nina Gusinskaia, Ian T. Hendrickson, J. F. Kaczmarek, Tom Landecker, Calvin Leung, Ryan Mckinven, Juan Mena-Parra, Nikola Milutinovic, Kenzie Nimmo, Aaron B. Pearlman, Andre Renard, Mubdi Rahman, J. Richard Shaw, Seth R. Siegel, Rick J. Smeagal, Tomas Cassanelli, Shami Chatterjee, Alice P. Curtin, Matt Dobbs, Fengqiu Adam Dong, Mark Halpern, Hans Hopkins, Victoria M. Kaspi, Kholoud Khairy, Kiyoshi W. Masui, Bradley W. Meyers, Daniele Michilli, Emily Petroff, Tristan Pinsonneault-Marotte, Ziggy Pleunis, Masoud Rafiei-Ravandi, Kaitlyn Shin, Kendrick Smith, Keith Vanderlinde, Tarik J. Zegmott
The CHIME/FRB Outriggers program aims to enhance the localization of fast radio bursts (FRBs) by adding VLBI capabilities to CHIME. The first outrigger telescope, KKO, is located 66 km west of CHIME and enables arcsecond-scale resolution while avoiding ionospheric effects. KKO's design includes a cylindrical paraboloid reflector, a receiver chain with analog and digital components, and a correlator for VLBI. The system is capable of high-resolution imaging, mapping the primary beam, and measuring feed positions. KKO's performance was characterized during its commissioning phase, showing stable noise characteristics and effective RFI mitigation. The KKO — CHIME baseline achieved 4 arcsec precision in localizing pulses from 20 pulsars. The system's design allows for subarcsecond localization of FRBs, with additional outriggers expected to be commissioned in 2024. KKO's performance, including its primary beam structure and RFI environment, was analyzed, demonstrating its effectiveness as a standalone telescope. The system's noise characteristics, SEFD, and calibration stability were also evaluated, showing consistency with CHIME. The KKO system is designed to provide high-quality data for FRB studies, enabling better understanding of their origins and cosmic applications.The CHIME/FRB Outriggers program aims to enhance the localization of fast radio bursts (FRBs) by adding VLBI capabilities to CHIME. The first outrigger telescope, KKO, is located 66 km west of CHIME and enables arcsecond-scale resolution while avoiding ionospheric effects. KKO's design includes a cylindrical paraboloid reflector, a receiver chain with analog and digital components, and a correlator for VLBI. The system is capable of high-resolution imaging, mapping the primary beam, and measuring feed positions. KKO's performance was characterized during its commissioning phase, showing stable noise characteristics and effective RFI mitigation. The KKO — CHIME baseline achieved 4 arcsec precision in localizing pulses from 20 pulsars. The system's design allows for subarcsecond localization of FRBs, with additional outriggers expected to be commissioned in 2024. KKO's performance, including its primary beam structure and RFI environment, was analyzed, demonstrating its effectiveness as a standalone telescope. The system's noise characteristics, SEFD, and calibration stability were also evaluated, showing consistency with CHIME. The KKO system is designed to provide high-quality data for FRB studies, enabling better understanding of their origins and cosmic applications.
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