no code implementations • 11 Jan 2021 • Kishalay De, Mansi M. Kasliwal, Matthew J. Hankins, Jennifer L. Sokoloski, Scott M. Adams, Michael C. B. Ashley, Aliya-Nur Babul, Ashot Bagdasaryan, Alexander Delacroix, Richard Dekany, Timothee Greffe, David Hale, Jacob E. Jencson, Viraj R. Karambelkar, Ryan M. Lau, Ashish Mahabal, Daniel McKenna, Anna M. Moore, Eran O. Ofek, Manasi Sharma, Roger M. Smith, Jamie Soon, Roberto Soria, Gokul Srinivasaragavan, Samaporn Tinyanont, Tony Travouillon
We perform the first quantitative simulation of a $3\pi$ time domain survey to estimate the Galactic nova rate using PGIR, and derive a rate of $\approx 46\pm13$ yr$^{-1}$.
High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics
1 code implementation • 22 Aug 2018 • Ofer M. Springer, Eran O. Ofek, Yair Weiss, Julian Merten
In this work we report on our initial attempt to reduce statistical errors in weak lensing shear estimation using a machine learning approach -- training a multi-layered convolutional neural network to directly estimate the shear given an observed background galaxy image.
Cosmology and Nongalactic Astrophysics
2 code implementations • 21 Dec 2015 • Barak Zackay, Eran O. Ofek
Here, we build on these results and derive from first principles a coaddition technique which is optimal for any hypothesis testing and measurement (e. g., source detection, flux or shape measurements and star/galaxy separation), in the background-noise-dominated case.
Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics
2 code implementations • 21 Dec 2015 • Barak Zackay, Eran O. Ofek
We show that for these purposes the best way to combine images is to apply a matched filter to each image using its own point spread function (PSF) and only then to sum the images with the appropriate weights.
Instrumentation and Methods for Astrophysics
