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67 papers
Image plane detection of FRB121102 with the MeerKAT radio telescope
J. C. Andrianjafy, N. Heeralall-Issur, A. A. Deshpande +9
We present the analysis of radio interferometric 2-s images from a MeerKAT observation of the repeating fast radio burst FRB121102 on September 2019, during which 11 distinct pulse…
A Minimal Space Interferometer Configuration for Imaging at Low Radio Frequencies
Akhil Jaini, Avinash A. Deshpande, Sainath Bitragunta
The radio sky at lower frequencies, particularly below 20 MHz, is expected to be a combination of increasingly bright non-thermal emission and significant absorption from interveni…
Iridium Satellite Signals: A Case Study in Interference Characterization and Mitigation for Radio Astronomy Observations
Avinash A. Deshpande, B. M. Lewis
Several post-detection approaches to the mitigation of radio-frequency interference (RFI) are compared by applying them to the strong RFI from the Iridium satellites. These provide…
On the Geometry of Curvature Radiation and Implications for Subpulse Drifting
S. J. McSweeney, N. D. R. Bhat, S. E. Tremblay +2
The phenomenon of subpulse drifting offers unique insights into the emission geometry of pulsars, and is commonly interpreted in terms of a rotating carousel of "spark" events near…
The dynamic spectral signatures from Lunar Occultation: A simulation study
Jigisha V. Patel, Avinash A. Deshpande
Lunar occultation, which occurs when the Moon crosses sight-lines to distant sources, has been studied extensively through apparent intensity pattern resulting from Fresnel diffrac…
The Murchison Widefield Array Transients Survey (MWATS). A search for low frequency variability in a bright Southern hemisphere sample
M. E. Bell, Tara Murphy, P. J. Hancock +38
We report on a search for low-frequency radio variability in 944 bright (> 4Jy at 154 MHz) unresolved, extragalactic radio sources monitored monthly for several years with the Murc…