Search Publications
XMM-Newton and Chandra Observations of the M31 Globular Cluster Black Hole Candidate XB135: A Heavyweight Contender Cut Down to Size
Murray, S. S.; Garcia, M. R.; Barnard, R. +2 more
CXOM31 J004252.030+413107.87 is one of the brightest X-ray sources within the D25 region of M31, and associated with a globular cluster known as B135; we therefore call this X-ray source XB135. XB135 is a low-mass X-ray binary (LMXB) that apparently exhibited hard state characteristics at 0.3-10 keV luminosities 4-6× {{10}38}…
WFPC2 UV survey of Galactic globular clusters. The Horizontal Branch temperature distribution
Dalessandro, E.; Salaris, M.; Lagioia, E. P. +2 more
Ultraviolet observations are the best tool to study hot stellar populations which emit most of their light at short wavelengths. As part of a large project devoted to the characterization of the UV properties of Galactic globular clusters (GGCs), we collected mid/far UV and optical images with the WFPC2@HST for 31 GGCs. These clusters cover a wide…
Constraining nonminimal DBI inflation with Planck2015 results
Asadi, Kosar; Nozari, Kourosh; Rashidi, Narges
We study cosmological inflation and perturbations in a nonminimally coupled Dirac-Born-Infeld setup in the light of the recent observational data reported by Planck collaboration. By adopting some important inflationary potentials, we analyze the scalar spectral index and the tensor-to-scalar ratio in confrontation with Planck 2015 data. In this m…
Identification of the ~3.55 keV emission line candidate objects across the sky
Savchenko, D. O.; Iakubovskyi, D. A.
An emission line at the energy ~3.55 keV detected in different galaxies and galaxy clusters has caused numerous discussions in high-energy astrophysics and particle physics communities. To reveal the origin of the line, we analyzed publicly-available observations of MOS cameras from XMM-Newton cosmic observatory - the instrument with the largest s…
Can ring current stabilize magnetotail during steady magnetospheric convection?
Ganushkina, N.; Dubyagin, S.; Liemohn, M. +1 more
The present study investigates the role of the ring current in stabilizing the magnetotail during steady magnetospheric convection (SMC) events. We develop a method for estimation of the symmetric ring current intensity from the single spacecraft magnetic field observations. The method is applied to a large number of SMC events identified using th…
The Study of Triple Systems V949 Cen, V358 Pup and V1055 Sco
Mašek, M.; Zasche, P.; Juryšek, J. +1 more
The systems V949 Cen, V358 Pup, and V1055 Sco are triples comprised of an eclipsing binary orbiting with a distant visual component on a much longer orbit. The first detailed photometric analysis of these interesting systems was performed using also the archival data from Hipparcos, ASAS, SuperWASP, OMC, and Pi of the Sky surveys. The system V358 …
Rosetta mission results pre-perihelion
Alves, J.; Forveille, T.; Guillot, T. +2 more
Chandra, XMM-Newton and HST observations of a transient in M31 with a possible asymmetric, precessing disc
Murray, S. S.; Garcia, M. R.; Barnard, R.
The transient X-ray source CXOM31 004205.77+411330.43 exhibited several outbursts during our long-term monitoring campaign of approximately monthly observations of the M31 centre with Chandra. However, the decay profile appears to be unlike those observed from Galactic transients. We followed up the 2011 outburst with two ∼B band HST/ACS observati…
Dose Measured On-Board INTEGRAL After More Than 12 Years in Space
Laurent, Philippe; Savchenko, Volodymyr; Sauvageon, Aymeric +1 more
X-ray photometry
Page, M. J.
I describe a method for synthesizing photometric passbands for use with current and future X-ray instruments. The method permits the standardization of X-ray passbands and thus X-ray photometry between different instruments and missions. The method is illustrated by synthesizing a passband in the XMM-Newton European Photon Imaging Camera pn which …