508 citations
- Eötvös Loránd UniversityHU162 papers
- Cukurova UniversityTR161 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PerugiaIT160 papers
- Tata Institute of Fundamental ResearchIN160 papers
- Middle East Technical UniversityTR159 papers
- Rice UniversityUS159 papers
- University of WarsawPL159 papers
- California Institute of TechnologyUS158 papers
- Fermi National Accelerator LaboratoryUS158 papers
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38 papers · 1 filter
Exploring the nature of an ultraluminous X-ray source in NGC 628
Hasan Avdan, Senay Avdan
In this work, we study the X-ray spectral and temporal properties of an ultraluminous X-ray source (ULX) in NGC 628 by using multi-epoch archival X-ray data. The physical parameter…
Optical Counterparts of Two Candidate Ultraluminous X-ray Sources in NGC 4536
H. Avdan, E. Sonbas, K. S. Dhuga +7
Archival {\it XMM-Newton}, {\it Chandra} and {\it Hubble Space Telescope (HST)} data have been used to study the X-ray and optical properties of two candidate ultraluminous X-ray s…
GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst
Maia A. Williams, Jamie A. Kennea, S. Dichiara +53
We report the discovery of the unusually bright long-duration gamma-ray burst (GRB), GRB 221009A, as observed by the Neil Gehrels Swift Observatory (Swift), Monitor of All-sky X-ra…
Catching profound optical flares in blazars
Gopal Bhatta, Staszek Zola, M. Drozdz +11
Flaring episodes in blazars represent one of the most violent processes observed in extra-galactic objects. Studies of such events shed light on the energetics of the physical proc…
Optical Counterparts of ULXs in NGC 1672
S. Allak, A. Akyuz, E. Sonbas +1
In this work, we deploy archival data from {\it HST}, {\it Chandra}, {\it XMM-Newton}, and {\it Swift-XRT}, to probe the nature of 9 candidate ULXs in NGC 1672. Specifically, our s…
A Temporal Scale to Track the Spectral Transitions in Low-Mass X-ray Binaries
E. Sonbas, K. Mohamed, K. S. Dhuga +1
The results of a temporal analysis of observations for a sample of nine low-mass X-ray binaries (LMXBs) are presented. Of these sources, five host a neutron star (NS) primary (4U16…