56 citations · 129 across the 7 of their papers we have counts for
9 papers
Galaxy-group-associated distances to Very High Energy gamma-ray emitting BL Lacs KUV 00311-1938 and S2 0109+22
Karri I. I. Koljonen, Elina Lindfors, Kari Nilsson +2
Blazars constitute the most numerous source class in the known extragalactic population of very high energy (VHE) gamma-ray sources. However, determining their redshifts is often c…
The invisible black widow PSR J1720-0534: implications for the electron density towards the North Polar Spur
Karri I. I. Koljonen, Sindre S. Lindseth, Manuel Linares +2
Radio emission from pulsars can be used to map out their distances through dispersion measure (DM), which quantifies the amount of radio pulse dispersion. However, this method reli…
A Gaia view of the optical and X-ray luminosities of compact binary millisecond pulsars
Karri I. I. Koljonen, Manuel Linares
In this paper, we study compact binary millisecond pulsars with low- and very low-mass companion stars (spiders) in the Galactic field, using data from the latest Gaia data release…
Secrets behind the RXTE/ASM light curve of Cyg X-3
Osmi Vilhu, Karri Koljonen, Diana Hannikainen
In wind-fed X-ray binaries, the radiatively driven wind of the primary star can be suppressed by the EUV irradiation of the compact secondary star, leading to an increased accretio…
The origin of optical emission lines in the soft state of X-ray binary outbursts: the case of MAXI J1820+070
K. I. I. Koljonen, K. S. Long, J. H. Matthews +1
The optical emission line spectra of X-ray binaries (XRBs) are thought to be produced in an irradiated atmosphere, possibly the base of a wind, located above the outer accretion di…
Bright mini-outburst ends the 12-year long activity of the black hole candidate Swift J1753.5-0127
Guobao Zhang, F. Bernardini, D. M. Russell +16
We present optical, UV and X-ray monitoring of the short orbital period black hole X-ray binary candidate Swift J1753.5-0127, focusing on the final stages of its 12year long out…