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Joint Cluster/Ground-Based Studies in the First 20 Years of the Cluster Mission
Fear, R. C.
Ground-based facilities make an important contribution to our understanding of the magnetospheric system. Coordination with ground-based facilities has been embedded within the Cluster mission since before launch, and this has given rise to a large number of studies which have exploited data from both Cluster and one or more of the diverse range o…
The Extragalactic Population of Accreting Neutron Stars and the Ultraluminous X-ray Sources Paradigm: from ULTraS to PULSULTraS
Salvaterra, R.; Tiengo, A.; de Luca, A. +11 more
The unambiguous identification of the nature of a neutron star in X-rays is achieved through the detection of coherent signals reflecting the spin period of the compact object. The search for coherent signals in the whole XMM-Newton source catalog was one of the main aims of the EU/FP7-funded project EXTraS (active in 2014-2016). The ULTraS and PU…
Spectral Unmixing and Abundance Estimation of Different Pyroxene Species Using IIRS Chandrayaan-2 Hyperspectral Imagery
Bhattacharya, S.; Kumar, A.; Misra, A. +6 more
Chandrayaan-2 IIRS was used to determine lunar minerals and their abundance near Taurus-Littrow valley consisting of Gardner Crater using linear mixing model.
Mass function of understudied open clusters NGC 2254 and Mayer 2
Kowshik, Krishna Kumar; Sujatha, S.; Komala, S. +1 more
The results of the CCD photometric UBVRI observations of the open clusters NGC 2254 and Mayer 2 are presented in this article. These clusters were observed using the 2-metre Himalayan Chandra Telescope at Hanle, India. NGC 2254 is located in the direction of Monoceros constellation at a distance of 2.57 ± 0.2 kpc and Mayer 2 is located in the dire…
Role of the companion lensing galaxy in the CLASS gravitational lens B1152+199
Zhang, L.; Zhang, M.; Yuan, Q. +1 more
We reinvestigate the Cosmic Lens All-Sky Survey (CLASS) gravitational lens B1152+199 using archived Hubble Space Telescope (HST) data and Very Long Baseline Interferometry (VLBI) data. A consistent luminosity ratio within effective radius between the host galaxy and the X-galaxy is measured from HST tri-band images, which leads to a mass ratio bet…
Dione's Thermal Inertia and Bolometric Bond Albedo Derived from Cassini/CIRS Observations of Solar Eclipse Ingress
Spencer, John R.; Howett, Carly J. A.
On 2010 May 18 Cassini's Composite Infrared Spectrometer (CIRS) observed Dione's leading hemisphere as its surface went into solar eclipse. Surface temperatures derived from each of CIRS' focal plane 3 (FP3, 600-1100 cm-1) show a rapid decrease in Dione's surface temperature upon eclipse ingress. This change was compared to the model su…
Semi-detached double-lined eclipsing binaries with Gaia DR3 data
Malkov, O. Yu.; Grinenko, A. D.; Sachkov, A. M.
Semi-detached double-lined eclipsing binaries (SD DLEB) play an important role in our understanding of basic properties of interacting binaries. We have collected data on semi-detached systems with available light and radial velocity curve solutions, and have compiled the most comprehensive list of SD DLEB, containing astrophysical and orbital par…
Study of Intra-Day Flux Distributions of Blazars Using XMM-Newton Satellite
Gaur, Haritma; Wani, Kiran
We present a study of the flux distribution of a sample of 15 Intermediate and Low-energy peaked blazars using XMM-Newton observations in a total of 57 epochs on short-term timescales. We characterise the X-ray variability of all of the light curves using excess fractional variability amplitude and found that only 24 light curves in 7 sources are …
Magnetosheath Filamentary Structures Driven by Foreshock Energetic Ions
Wei, Xinhua; Ma, Yuduan; Yang, Junying +1 more
Previous simulation studies have revealed the formation of magnetosheath filamentary structures by foreshock energetic ions. We report Cluster and Double Star observations of three such events triggered by a foreshock bubble, a hot flow anomaly and a traveling foreshock, respectively. In each case, in association with the onset of foreshock energe…
OGLE-BLG504.12.201843: a possible extreme dwarf nova
Strader, Jay; Udalski, Andrzej; Prieto, Jose L. +5 more
We present the analysis of existing optical photometry and new optical spectroscopy of the candidate cataclysmic variable star OGLE-BLG504.12.201843. As was shown previously, this object has an orbital period of 0.523419 d and exhibits year-long outbursts with a mean period of 973 d. Using digitized photographic archives, we show that the earliest…