16 citations · 37 across the 4 of their papers we have counts for
4 papers
The ULX Source X-3 in NGC 4258: A Search for Its X-ray and Optical Properties
A. Akyuz, S. Avdan, S. Allak +3
We present the results of a search for the nature of ultraluminous X-ray source (ULX) X-3 in the nearby galaxy NGC 4258. We use archival data from {\it XMM-Newton}, {\it Chandra},…
X-ray spectral and optical properties of a ULX in NGC 4258 (M106)
Hasan Avdan, Senay Avdan, Aysun Akyuz +3
We study the X-ray and optical properties of the ultraluminous X-ray source (ULX) X-6 in the nearby galaxy NGC 4258 (M106) based on the archival {\it XMM-Newton}, {\it Chandra}, {\…
Optical counterparts of two ULXs in NGC5474 and NGC3627 (M66)
S. Avdan, A. Vinokurov, S. Fabrika +6
We identified two optical counterparts of brightest ultraluminous X-ray Sources (ULXs) in galaxies NGC5474 and NGC3627 (M66). The counterparts in Hubble Space Telescope images are…
A search for periodicities from a ULX in the LINER galaxy NGC 4736
H. Avdan, S. Kayaci Avdan, A. Akyuz +1
We report our findings on a new quasi-periodic oscillation (QPO) and a long period from the ultraluminous X-ray source (ULX) X-2 in nearby galaxy NGC 4736 based on the Chandra and…