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XMM-Newton and INTEGRALanalysis of the Supergiant Fast X-ray Transient IGR J17354-3255
Hill, A. B.; Bird, A. J.; Sguera, V. +2 more
We present the results of combined INTEGRALand XMM-Newton observations of the supergiant fast X-ray transient (SFXT) IGR J17354-3255. Three XMM-Newton observations of lengths 33.4, 32.5, and 21.9 ks were undertaken, the first an initial pointing to identify the correct source in the field of view and the latter two performed around periastron. Sim…
CCD Observations and Period Change of the Type ab RR Lyrae Star DV Mon
Dambis, A. K.; Berdnikov, L. N.; Kniazev, A. Yu. +3 more
We took a total of 635 B-, V-, and Ic-band CCD frames for the RRab Lyr type variable DVMon, which has a close bright visual companion with a separation of about 1.9'. Observations were made with the 76-cm telescope of the South African Astronomical Observatory (SAAO, South Africa) using SBIG CCD ST-10XME. For the first time, we obtained…
Retrieval of Martian ozone and dust from SPICAM spectrometer for MY27-MY28
Montmessin, Franck; Modak, Ashimananda; Sheel, Varun
Ozone (O3) is important in the stabilisation of CO_{{2}} in the Martian atmosphere and thus it is important to study the spatio-temporal variability of O_{{3}}. We retrieve two years of total columnar O_{{3}} from raw spectral data provided by the SPectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars (SPICA…
Deep lensing with a twist: E and B modes in a field with multiple lenses
Tyson, J. Anthony; Jee, M. James; Bradshaw, Andrew K.
We explore the weak lensing E- and B-mode shear signals of a field of galaxy clusters using both large-scale structure N-body simulations and multicolour Suprime-cam & Hubble Space Telescope observations. Using the ray-traced and observed shears along with photometric redshift catalogues, we generate mass maps of the foreground overdensities b…
A pre-merger stage galaxy cluster: Abell 3733
Caglar, Turgay; Kaya, H. Ilker; Sert, Hakan
The galaxy cluster Abell 3733 (A3733) is a very suitable candidate in addressing dynamical processes throughout galaxy cluster mergers. This study shows structural analysis results of A3733 (z = 0.038) based on X-ray and optical data. According to X-ray luminosity map, A3733 hosts two sub-structures separated in the sky by 0.25 Mpc, and the two di…
A Correction for GALEX Spectroscopic UV Flux Distributions from Comparisons with CALSPEC and IUE
Bianchi, Luciana; Bohlin, Ralph C.
The CALSPEC database of absolute spectral energy distributions (SEDs) from the Hubble Space Telescope is based on pure hydrogen model atmosphere calculations for three unreddened white dwarf stars and represents the current UV flux calibration standard with a precision approaching 1% for well observed stars. Following our previous work to correct …
Surface mechanical properties of comet 67P
Krüger, H.; Knapmeyer, M.; Fischer, H. -H. +1 more
We give an overview of the mechanical properties of the surface material of comet 67P/Churyumov-Gerasimenko, as measured with the Surface Electric Sounding and Acoustic Monitoring Experiment instruments within the Rosetta/Philae mission. The data yielded information on the compression strength and the elastic modulus of the surface material and of…
Material Charging Investigations for Solar Orbiter
Polsak, A. W.; Delacourt, B.; Dias, N. +1 more
Absolute parameters of young stars: V454 Carinae
Demircan, O.; Özkardeş, B.; Erdem, A. +4 more
We present combined photometric and spectroscopic analyses of the multiple star V454 Carinae. High-resolution spectra of the system were taken at the University of Canterbury Mt. John Observatory during the years 2008-18. These have been processed using generic and purpose-built software. New digital single lens reflex photometry of the system has…
Hierarchical Bayesian approach for estimating physical properties in nearby galaxies: Age Maps (Paper II)
Bland-Hawthorn, Joss; Pérez, Enrique; Cerviño, Miguel +3 more
One of the fundamental goals of modern astrophysics is to estimate the physical parameters of galaxies. We present a hierarchical Bayesian model to compute age maps from images in the H α line (taken with Taurus tunable filter, TTF), ultraviolet band (GALEX far UV, FUV), and infrared bands (Spitzer 24, 70, and 160 µm). We present the burst a…