108 citations · 446 across the 11 of their papers we have counts for
11 papers
Photometric observations of the asteroid 3200 Phaethon using small and middle telescopes
A. Kartashova, M. Husarik, O. Ivanova +5
The main aim of photometrical observations of the asteroid 3200 Phaethon was searching for its low-level cometary activity (possible coma and/or dust tail) in the pre-perihelion pa…
Varying disc-magnetosphere coupling as the origin of pulse profile variability in SAX J1808.4-3658
Jari J. E. Kajava, Askar Ibragimov, Marja Annala +2
Accreting millisecond pulsars show significant variability of their pulse profiles, especially at low accretion rates. On the other hand, their X-ray spectra are remarkably similar…
The 2009 outburst of accreting millisecond pulsar IGR J17511-3057 as observed by SWIFT and RXTE
A. Ibragimov, J. J. E. Kajava, J. Poutanen
The twelfth accretion-powered millisecond pulsar, IGR J17511-3057, was discovered in September 2009. In this work we study its spectral and timing properties during the 2009 outbur…
On the nature of pulse profile variations and timing noise in accreting millisecond pulsars
Juri Poutanen, Askar Ibragimov, Marja Annala
Timing noise in the data on accretion-powered millisecond pulsars (AMP) appears as irregular pulse phase jumps on timescales from hours to weeks. A large systematic phase drift is…
Accreting millisecond pulsar SAX J1808.4-3658 during its 2002 outburst: evidence for a receding disc
Askar Ibragimov, Juri Poutanen
An outburst of the accreting X-ray millisecond pulsar SAX J1808.4-3658 in October-November 2002 was followed by the Rossi X-ray Timing Explorer for more than a month. We demonstrat…
Orbital and superorbital variability and their coupling in X-ray binaries
Andrzej A. Zdziarski, Juri Poutanen, Askar Ibragimov +2
We review X-ray flux modulation from X-ray binaries on time scales corresponding to the orbital period and those at longer time scales (so called superorbital). Those modulations p…