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Center for Astrophysics Research and Technologies Seminar Series Information


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Modeling the Low-Frequency Sky with the Long Wavelength Array

Thursday July 14, 2022
2:00 pm

 Presenter:  Craig Taylor (UNM)
 Series:  Center for Astrophysics Research and Technologies Seminar Series
 Abstract:  Time-domain astronomy at megahertz frequencies has become a growing focus for low frequency
telescopes as technology and methods of processing data have improved during the last few decades. In this effort, creating quiet sky models for local and cosmic observations of the sky is crucial in increasing sensitivity to transient phenomena both in Earth's atmosphere and beyond. Previous Long Wavelength Array (LWA) transient studies utilized image subtraction of a subset of recent captures to create background-subtracted images. While this method is quick to compute clean images on the fly, it can also introduce noise from corrupted earlier images and create non-physical structures in subtracted data. This presentation will be an overview of over a year of efforts to build a Local Sidereal Time (LST) mapped, all-sky model, of the low-frequency sky (20-40MHz) as seen by two LWA stations. In addition to an exploration of the many applications for model subtracted sets of images. Particularly with emphasis on a NASA-funded effort to study and track dynamic ionosphere structures called Sporadic E-regions.
 Host:  Gregory Taylor
 Location:  PAIS-3205, PAIS

Disability Notice If you need an auxiliary aid or service to attend any Department of Physics and Astronomy event, please contact the department (phone: 505 277-2616; email: physics@unm.edu) as far in advance as possible to ensure you are accommodated.