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Radiometric calibration of the SIMBIO-SYS STereo imaging Channel
Cremonese, G.; Da Deppo, V.; Naletto, G. +11 more
The STereo imaging Channel (STC) is a double wide-angle camera developed to be one of the channels of the SIMBIO-SYS instrument onboard of the ESA BepiColombo mission to Mercury. STC main goal is to map in 3D the whole Mercury surface. The geometric and radiometric responses of the STC Proto Flight model have been characterized on-ground during th…
The Y SZ,Planck - Y SZ,XMM scaling relation and its difference between cool-core and non-cool-core clusters
Zhao, Hai-Hui; Jia, Shu-Mei; Chen, Yong +3 more
We construct a sample of 70 clusters using data from XMM-Newton and Planck to investigate the Y SZ,Planck - Y SZ,XMM scaling relation and the cool-core influences on this relation. Y SZ,XMM is calculated by accurately de-projected temperature and electron number density profiles derived from XMM-Newton. Y S…
The SCUBA-2 Cluster Snapshot Survey - I. Catalogue of lensed galaxies and submillimetre-bright central galaxies
Egami, Eiichi; Geach, James E.; Chapman, Scott C. +6 more
The SCUBA-2 Cluster Snapshot Survey (S2CSS) observed 202 rich clusters of galaxies at 850 µm in relatively poor submillimetre observing conditions (\tau _{{ 225 GHz}}> 0.1) with the aim of identifying rare examples of bright (tens of mJy) gravitationally lensed submillimetre galaxies. The S2CSS covered over 0.33 deg2 to an aver…
Spectroscopic Investigations of Galactic Clusters with Associated Cepheid Variables. III. Collinder 394 and BB SGR
Kniazev, A. Yu.; Miroshnichenko, A. S.; Mishenina, T. V. +4 more
We present the results of a spectroscopic and photometric investigation of 20 objects from the open cluster Collinder 394, which contains the Cepheid BB Sgr. Besides the Cepheid, we studied tree K-giants, four B-giants, and twelve B-A-F main sequence stars. Radial velocities (RV), v sin i, Teff, log g, were determined using spectroscopi…
Identification of the SMART-1 spacecraft impact location on the Moon
Stooke, P. J.
The impact site of the European Space Agency SMART-1 lunar orbiter was identified in Lunar Reconnaissance Orbiter (LRO) Camera (LROC) images. No pre-impact image of adequate resolution is available for confirmation, but the form of the impact feature and its ejecta, its proximity to the expected location and the absence of any other obvious candid…
Oxygen Ion Butterfly Distributions Observed in a Magnetotail Dipolarizing Flux Bundle
Zhang, H.; Sun, W. J.; Fu, S. Y. +8 more
Cluster observed two intermittent oxygen ion (O+) flux enhancements with energy dispersions in a dipolarizing flux bundle, which is known as a region of enhanced northward magnetic field (Bz) embedded in the earthward high-speed flow. The flux enhancements of O+ show clear pitch angle dependences, which are termed …
DECam survey for low-mass stars and substellar objects in the UCL and LCC subgroups of the Sco-Cen OB Association (SCOCENSUS)
Mamajek, Eric E.; James, David J.; Bell, Cameron P. M. +5 more
Using images taken with the Dark Energy Camera (DECam), the first extensive survey of low mass and substellar objects is made in the ∼15-20 Myr Upper Centaurus Lupus (UCL) and Lower Centaurus Crux (LCC) subgroups of the Scorpius-Centaurus OB Association (Sco-Cen). Due to the size of our data set (>2Tb), we developed an extensive open source set…
Origin and Status of Low-Mass Candidate Hypervelocity Stars
Koo, Jae-Rim; Beers, Timothy C.; Lee, Young Sun +2 more
We present an analysis of the chemical abundances and kinematics of six low-mass dwarf stars, previously claimed to be candidate hypervelocity stars (HVSs). We obtained moderate-resolution (R=6000) spectra of these stars to estimate the abundances of several chemical elements (Mg, Si, Ca, Ti, Cr, Fe, and Ni), and derived their space velocities and…
OT UMa and GU leo: Two middle-contact w UMa binaries with similar stellar components
Michel, Raul; Kjurkchieva, Diana; Guerrero, Carlos
We present photometric observations of the W UMa binaries OT UMa and UG Leo. Our results from the light curve solutions are: (i) The two targets show partial eclipses; (ii) The components OT UMa and UG Leo are of G spectral type; (iii) Detailed q-search analysis was carried out for determination of the mass ratios; (iv) The two binaries are of W s…
Variable binaries and variables in binaries in the Binary star DataBase
Malkov, Oleg; Kovaleva, Dana; Kaygorodov, Pavel
The Binary star DataBase (BDB, http://bdb.inasan.ru) combines data from catalogs of binary and multiple stars of all observational types. There is a number of ways for variable stars to form or to be a part of binary or multiple systems. We describe how such stars are represented in the database.