Search Publications
The SNAD Viewer: Everything You Want to Know about Your Favorite ZTF Object
Ishida, Emille E. O.; Krone-Martins, Alberto; Volnova, Alina A. +9 more
We describe the SNAD Viewer, a web portal for astronomers which presents a centralized view of individual objects from the Zwicky Transient Facility's (ZTF) data releases, including data gathered from multiple publicly available astronomical archives and data sources. Initially built to enable efficient expert feedback in the context of adaptive m…
JWST NIRCam Defocused Imaging: Photometric Stability Performance and How It Can Sense Mirror Tilts
Gennaro, Mario; Espinoza, Néstor; Perrin, Marshall D. +25 more
We use JWST NIRCam short-wavelength photometry to capture a transit lightcurve of the exoplanet HAT-P-14 b to assess performance as part of instrument commissioning. The short-wavelength precision is 152 ppm per 27 s integration as measured over the full time series compared to a theoretical limit of 107 ppm, after corrections to spatially correla…
The Near Infrared Imager and Slitless Spectrograph for JWST. V. Kernel Phase Imaging and Data Analysis
Willott, Chris J.; Noirot, Gaël; Mérand, Antoine +26 more
Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. The high-Strehl full pupil images provided by the James Webb Space Telescope (JWST) are ideal for application of the KPI technique. We present a kernel phase analysis of JWST NIRISS …
The Large Array Survey Telescope-Science Goals
Gal-Yam, A.; Rybicki, K.; Sadeh, I. +21 more
The Large Array Survey Telescope (LAST) is designed to survey the variable and transient sky at high temporal cadence. The array is comprised of 48 F/2.2 telescopes of 27.9 cm aperture, coupled to full-frame backside-illuminated cooled CMOS detectors with 3.76 µm pixels, resulting in a pixel scale of 1.″25. A single telescope with a field of…
Introducing the Condor Array Telescope. I. Motivation, Configuration, and Performance
Walter, Frederick M.; Shara, Michael M.; Lanzetta, Kenneth M. +4 more
The "Condor Array Telescope" or "Condor" is a high-performance "array telescope" comprised of six apochromatic refracting telescopes of objective diameter 180 mm, each equipped with a large-format, very low-read-noise (≈1.2 e-), very rapid-read-time (<1 s) CMOS camera. Condor is located at a very dark astronomical site in the southwe…
A Study of Twelve Potential Merger Candidate Contact Binary Systems
Filipović, Miroslav D.; Wadhwa, Surjit S.; Tothill, Nick F. H. +4 more
Photometric observations and analysis of twelve previously poorly studied contact binary systems is presented. All show total eclipses and have extremely low mass ratios ranging from 0.072 to 0.15. Also, all show characteristics of orbital instability with mass ratios within the theoretical orbital instability range. Although none demonstrate a si…
The TEMPO Survey. I. Predicting Yields of Transiting Exosatellites, Moons, and Planets from a 30 days Survey of Orion with the Roman Space Telescope
Vanderburg, Andrew; Heller, René; Kounkel, Marina +12 more
We present design considerations for the Transiting Exosatellites, Moons, and Planets in Orion (TEMPO) Survey with the Nancy Grace Roman Space Telescope. This proposed 30 days survey is designed to detect a population of transiting extrasolar satellites, moons, and planets in the Orion Nebula Cluster (ONC). The young (1-3 Myr), densely populated O…
The Large Array Survey Telescope-Pipeline. I. Basic Image Reduction and Visit Coaddition
Fallah Ramazani, V.; Ofek, E. O.; Ben-Ami, S. +18 more
The Large Array Survey Telescope (LAST) is a wide-field telescope designed to explore the variable and transient sky with a high cadence and to be a test-bed for cost-effective telescope design. A LAST node is composed of 48 (32 already deployed), 28 cm f/2.2 telescopes. A single telescope has a 7.4 deg2 field of view and reaches a 5σ l…
Broadband X-Ray Spectral Analysis of the ULX NGC 1313 X-1 Using JeTCAF: Origin of the ULX Bubble
Mondal, Santanu; Palit, Biswaraj
NGC 1313 X-1 is a mysterious ultraluminous X-ray (ULX) source whose X-ray-powering mechanism and bubble-like structure surrounding the source are topics of intense study. Here, we perform an X-ray spectroscopic study of the source using joint XMM-Newton and NuSTAR observations taken during 2012-2017. The combined spectra cover the energy band 0.3-…
Deep Large Binocular Camera r-band Observations of the GOODS-N Field
Fontana, Adriano; Grazian, Andrea; Grogin, Norman A. +22 more
We obtained 838 Sloan r-band images (~28 hr) of the GOODS-North field with the Large Binocular Camera (LBC) on the Large Binocular Telescope in order to study the presence of extended, low surface brightness features in galaxies and investigate the trade-off between image depth and resolution. The individual images were sorted by effective seeing,…