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Sensor characterization for the ULTRASAT space telescope
Benjamin Bastian-Querner, Nirmal Kaipachery, Daniel Küsters +31
The Ultraviolet Transient Astronomical Satellite is a scientific space mission carrying an astronomical telescope. The mission is led by the Weizmann Institute of Science in Israel…
Design of the ULTRASAT UV camera
Arooj Asif, Merlin Barschke, Benjamin Bastian-Querner +34
The Ultraviolet Transient Astronomical Satellite (ULTRASAT) is a scientific UV space telescope that will operate in geostationary orbit. The mission, targeted to launch in 2024, is…
The Weizmann Fast Astronomical Survey Telescope (W-FAST): System Overview
Guy Nir, Eran O. Ofek, Sagi Ben-Ami +8
A relatively unexplored phase space of transients and stellar variability is that of second and sub-second time-scales. We describe a new optical observatory operating in the Negev…
The GN-z11-Flash Event Can be a Satellite Glint
Guy Nir, Eran O. Ofek, Avishay Gal-Yam
Recently Jiang et al. reported the discovery of a possible short duration transient, detected in a single image, spatially associated with a z~11 galaxy. Jiang et al. and Kahn et a…
Measuring time delays: II. Using observations of the unresolved flux and astrometry
Ofer M. Springer, Eran O. Ofek
Lensed quasars and supernovae can be used to study galaxies' gravitational potential and measure cosmological parameters. The typical image separation of objects lensed by galaxies…
Measuring time delays: I. Using a flux time series that is a linear combination of time-shifted light curves
Ofer M. Springer, Eran O. Ofek
(Abridged) Several phenomena in astrophysics generate light curves with time delays. Among these are reverberation mapping, and lensed quasars. In some systems, the measurement of…