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Reconstruction of the flight and attitude of Rosetta's lander Philae
Richter, Ingo; Auster, Hans-Ulrich; Heinisch, Philip +14 more
Since Rosetta's lander Philae touched down on comet 67P/Churyumov-Gerasimenko on November 12, 2014, many tools have been applied to reconstruct Philae's flight path and attitude between separation, the touchdowns, collision and the final landing at Abydos. In addition to images from the cameras onboard both orbiter and lander (;OSIRIS;, ;CIVA; and…
Detecting periodic oscillations in astronomy data: revisiting wavelet analysis with coloured and white noise
Xu, Chang
The intrinsic random variability of an astronomical source hampers the detection of possible periodicities that we are interested in. We find that a simple first-order autoregressive [AR(1)] process gives a poor fit to the power decay in the observed spectrum for astrophysical sources and geodetic observations. Thus, appropriate background noise m…
Validation of the CME Geomagnetic Forecast Alerts Under the COMESEP Alert System
Dumbović, Mateja; Vršnak, Bojan; Rao, Yamini K. +3 more
Under the European Union 7th Framework Programme (EU FP7) project Coronal Mass Ejections and Solar Energetic Particles (COMESEP, http://comesep.aeronomy.be), an automated space weather alert system has been developed to forecast solar energetic particles (SEP) and coronal mass ejection (CME) risk levels at Earth. The COMESEP alert system uses the …
Catalogue of Astrometric Positions of Jupiter's Outer Satellites on Photographic Observations in Mao NAS of Ukraine in 1987-1993
Yizhakevych, O.; Andruk, V.; Pakuliak, L.
The catalog of 33 topocentric positions of Jupiter's moons J6, J7, J8 has been created on photographic observations made in MAO NASU in 1987-1993. Positions are referred to the system of TYCHO-2 using the program package INUX/MIDAS/ROMAFOT. The comparison of observed positions was made online with their theoretical data of IMCCE (www.imcce.fr/sat).
Future perspectives for abundance measurements in clusters of galaxies with XMM-Newton
Mernier, F.; de Plaa, J.
The CHEERS (CHEmical enrichment reflection grating spectrometer sample) observations of clusters of galaxies with XMM-Newton have shown to be valuable to constrain the chemical evolution of the universe. The soft X-ray spectrum contains lines of the most abundant metals from N to Ni, which provide relatively accurate abundances that can be compare…
Kepler Data on KIC 7341653: A Nearby M Dwarf with Monster Flares and a Phase-coherent Variability
Makarov, Valeri V.; Goldin, Alexey
KIC 7341653 is one of several late-type M dwarfs observed by the main mission of Kepler with peculiar infrared colors placing them in the domain of suspected young stellar objects (YSO). It is likely associated with a powerful X-ray emitter with X-ray flares. Kepler light curves reveal two distinct types of activity: frequent flares lasting from l…
Proper motions of five OB stars with candidate dusty bow shocks in the Carina Nebula
Smith, Nathan; Bally, John; Reiter, Megan +1 more
We constrain the proper motions of five OB stars associated with candidate stellar wind bow shocks in the Carina Nebula using Hubble Space Telescope ACS imaging over 9-10 yr baselines. These proper motions allow us to directly compare each star's motion to the orientation of its candidate bow shock. Although these stars are saturated in our imagin…
The MEXSAS2 Sample and the Ensemble X-ray Variability of Quasars
Serafinelli, Roberto; Middei, Riccardo; Chiaraluce, Elia +1 more
We present the second Multi-Epoch X-ray Serendipitous AGN Sample (MEXSAS2), extracted from the 6th release of the XMM Serendipitous Source Catalogue release (XMMSSC-DR6), cross-matched with Sloan Digital Sky Survey quasar catalogues DR7Q and DR12Q. Our sample also includes the available measurements for masses, bolometric luminosities, and Eddingt…
A New Look at the Integrated Radio/Microwave Continuum Spectrum of Galactic Supernova Remnant IC 443
Onić, D.; Leahy, D.; Urošević, D.
Recent observations of the microwave sky, by space telescopes such as the Wilkinson Microwave Anisotropy Probe and Planck, have opened a new window into the analysis of continuum emission from supernova remnants (SNRs). In this paper, different emission models that can explain the characteristic shape of currently known integrated radio/microwave …
X-ray-selected broad absorption line quasi-stellar objects
Esquej, P.; Streblyanska, A.; Ebrero, J. +11 more
We study a sample of six X-ray-selected broad absorption line (BAL) quasi-stellar objects (QSOs) from the XMM-Newton Wide Angle Survey. All six objects are classified as BALQSOs using the classic balnicity index, and together they form the largest sample of X-ray-selected BALQSOs. We find evidence for absorption in the X-ray spectra of all six obj…