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Photometry and astrometry with JWST‑II: NIRCam distortion correction
Bedin, L. R.; Nardiello, D.; Griggio, M.
In preparation to make the most of our own planned James Webb Space Telescope investigations, we take advantage of publicly available calibration and early‑science observations to independently derive and test a geometric‑distortion solution for NIRCam detectors. Our solution is able to correct the distortion to better than 0.2 mas. Current data i…
Gaia search for stellar companions of TESS Objects of Interest IV
Mugrauer, M.; Rück, J.; Michel, K. -U.
We present the latest results of our ongoing multiplicity study of (Community) TESS Objects of Interest, using astrometric and photometric data from the ESA‑Gaia mission to detect stellar companions of these stars and characterize their properties. A total of 134 binary, 6 hierarchical triple, and two quadruple star systems are identified among 11…
On the true nature of the contact binary CRTS J192848.7‑404555
Filipović, Miroslav; Wadhwa, Surjit S.; DeHorta, Ain Y. +1 more
CRTS J192848.7‑404555 was recognized as a potential contact binary merger candidate on the basis of survey photometry analysis. We have carried out follow‑up ground‑based photometry of the system and showed that at the recorded coordinates for the system, there are two stars approximately 3 s of arc apart. Our analysis shows that the fainter of th…
Kinematical and ellipsoidal properties of K dwarfs in the solar neighborhood of the Gaia era
Elsanhoury, W. H.; Al-Johani, Amnah S.
The study reports velocity ellipsoid parameters including the kinematical properties of K dwarf stars. Herein, two samples of K dwarf stars are presented with the solar neighborhood ( pc) for high (; 106 points) and low galactic latitudes (; 199 points). We calculated spatial velocities (, , and ; km s) along the galactic coordinates and the veloc…
The Maunakea Spectroscopic Explorer: Thousands of fibers, infinite possibilities
Sobeck, Jennifer; Barden, Samuel C.; Sheinis, Andrew
The Maunakea Spectroscopic Explorer (MSE) is a massively multiplexed spectroscopic survey facility that will replace the Canada–France–Hawai'i Telescope over the next two decades. This 12.5‑m telescope, with its 1.5 square degree field of view, will observe 18,000–20,000 astronomical targets in every pointing from 0.36 to 1.80 m at low/moderate re…
The astrophysical parameters of Majaess‑95 and Majaess‑225
Tadross, A. L.
Most astrophysical parameters of the two stellar clusters Majaess 95 and Majaess 225 have been investigated here for the first time using the third data release of the Gaia space mission (Gaia‑DR3). The membership probabilities of stars were assigned using the pyUPMASK algorithm. The parallaxes offset has been corrected using the zero‑point correc…
Measurements of visual double stars with PISCO2 at the Nice 76‑cm refractor in 2013–2014 (new data) and in 2015
Vakili, F.; Rivet, J. -P.; Ling, J. F. +11 more
We present relative astrometric and photometric measurements of visual double stars made in 2013–2015, with PISCO2 installed at the 76‑cm refractor of Côte d'Azur Observatory in Nice (France). Our observing list contains orbital couples as well as double stars whose motion is still uncertain. Most of the observations were done in 2015, but some ot…
Confirmation and characterization of neglected WDS systems using Gaia data release 3 and the virtual observatory
Cortés-Contreras, M.; Solano, E.; Rodrigo, C. +2 more
The aim of this article is making use of the Gaia DR3 catalogue and virtual observatory tools, to confirm and characterize 428 binary and multiple stellar systems classified as neglected (only one observation) in the Washington Double Star Catalogue (WDS). The components of the stellar systems have the same parallax and proper motion (within the e…