Computer Science – Performance
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1035..276m&link_type=abstract
THE EVOLUTION OF GALAXIES THROUGH THE NEUTRAL HYDROGEN WINDOW. AIP Conference Proceedings, Volume 1035, pp. 276-278 (2008).
Computer Science
Performance
Astronomical Observations, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Spectroscopy And Spectrophotometry, Astrometric And Interferometric Instruments, Radio Telescopes And Instrumentation, Heterodyne Receivers, Radio, Microwave
Scientific paper
The new L-band system of the EVLA and the array's enhanced capabilities will make it possible to carry out observations below 1200 MHz and down to 940 MHz; a frequency range where the VLA has severe limitations and/or simply cannot observe. To test whether astronomical science can be delivered at such frequencies, we carried out observations on two HI absorbers using the B-configuration at 1139 and 1082 MHz. Although below 1150 MHz the band is dominated by RFI from aeronautical navigation, we were able to obtain results consistent with the expected performance of the array with its current capabilities. Once completed, the EVLA will provide much improved sensitivity at the lowest L-band frequencies, making the array a major instrument in studies of redshifted HI and other spectral lines down to 940 MHz.
Momjian Emmanuel
Perley Rick
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