Week of Events
Sunday, April 5, 2026
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Monday, April 6, 2026
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Tuesday, April 7, 2026
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Wednesday, April 8, 2026
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Thursday, April 9, 2026
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Friday, April 10, 2026
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April 10, 2026 -CGCA Seminar – Reshma Anna Thomas
CGCA Seminar – Reshma Anna Thomas
Low-Frequency Radio Transients
Reshma Anna Thomas
Netherlands Institute for Radio Astronomy, University of Amsterdam
The low-frequency radio sky (<300 MHz) remains comparatively underexplored for fast and slow transients (~ microseconds to minutes), primarily due to strong propagation effects as well as instrumental challenges. However, this regime provides unique leverage on plasma environments and emission physics that are inaccessible at GHz frequencies. Fast radio bursts (FRBs) are extragalactic coherent transients with millisecond durations, often exhibiting sub-millisecond temporal structure. I will present detections of two FRBs at 150 MHz using beamformed searches with LOFAR, which place some of the most stringent constraints to date on free–free absorption in their local environments. In parallel, a new class of Galactic sources, long-period transients (LPTs), has recently emerged, characterized by emission on second-to-minute durations and periodicities spanning minutes to hours.
Saturday, April 11, 2026
No events on this day.