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Single object observations: Large telescopes vs. multiple small telescopes
Sagi Ben-Ami, Eran Oded Ofek
A significant fraction of large-telescope observing time is devoted to single-object spectroscopy and photometry. We compare the cost-effectiveness of different telescope architect…
The Large Array Survey Telescope-Pipeline. II. Image Subtraction and Transient Detection
R. Konno, E. O. Ofek, A. Krassilchtchikov +16
Context. The Large Array Survey Telescope (LAST) is a wide-field visual-band survey designed to explore the variable and transient sky with high cadence. Its raw data stream is aut…
Science with a large field-of-view polarization survey: The Large Array Survey Telescope Polarization Node (LAST-P)
V. Barbosa Martins, N. Jordana Mitjans, S. Garrappa +14
Optical polarimetry provides information on the geometry of the emitting region, the magnetic field configuration and the properties of dust in astrophysical sources. Current state…
Towards sub-milliarcsecond astrometric precision using seeing-limited imaging
Noam Segev, Eran O. Ofek, Yossi Shvartzvald +21
The Earth's atmospheric turbulence degrades the precision of ground-based astrometry. Here, we discuss these limitations and propose that, with proper treatment of systematics and…
Accurate photometric calibration by fitting the system transmission
S. Garrappa, E. O. Ofek, S. Ben-Ami +10
Transforming the instrumental photometry of ground-based telescopes into a calibrated physical flux in a well-defined passband is a major challenge in astronomy. Along with the int…
X-Sifter: detecting transients in X-ray data using the optimal Poisson matched filter
Maayane T. Soumagnac, Eran O. Ofek, Shachar S. Israeli +2
We present X-sifter, a software package designed for near-optimal detection of sources in X-ray images and other forms of photon images in the Poisson-noise regime. The code is bas…