429 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Massachusetts Institute of TechnologyUS50 papers
- Koç UniversityTR46 papers
- Feza Gürsey InstituteTR30 papers
- Boğaziçi UniversityTR28 papers
- Middle East Technical UniversityTR25 papers
- University of CambridgeGB22 papers
- University of OxfordGB21 papers
- University of ManchesterGB20 papers
- Fermi National Accelerator LaboratoryUS19 papers
- Kansas State UniversityUS19 papers
- University of ChicagoUS19 papers
- Columbia UniversityUS18 papers
26 papers · 1 filter
The GPSP Atlas: High-resolution Galactic Photon Survival Probability Atlas for Very-High- and Ultra-High-Energy Gamma-Ray Astronomy
Ekrem Oğuzhan Angüner
The emergence of Galactic PeV astronomy makes photon--photon () absorption an increasingly important component of gamma-ray data analysis. In this work, the Galactic Photon Sur…
Galactic transient sources with the Cherenkov Telescope Array Observatory
Cherenkov Telescope Array Observatory Consortium
A wide variety of Galactic sources show transient emission at soft and hard X-ray energies: low- and high-mass X-ray binaries containing compact objects, isolated neutron stars exh…
The expected potential of hadronic PeVatron searches with spectral -ray data from the Southern Wide-field Gamma-ray Observatory
Ekrem Oğuzhan Angüner, Tülün Ergin
The presence of a spectral softening, occurring at 3 PeV energies, seen in the local cosmic-ray energy spectrum provides an evidence that our Galaxy hosts astrophysical objects, kn…
Search for the Galactic accelerators of Cosmic-Rays up to the Knee with the Pevatron Test Statistic
E. O. Angüner, G. Spengler, E. Amato +1
The Pevatron Test Statistic (PTS) is applied to data from -ray observatories to test for the origin of Cosmic Rays (CRs) at energies around the knee of the CR spectrum. Several…
Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
The Cherenkov Telescope Array Consortium
A deep survey of the Large Magellanic Cloud at ~0.1-100TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the…
Exploring the high energy frontiers of the Milky Way with ground-based gamma-ray astronomy: PeVatrons and the quest for the origin of Galactic cosmic-rays
E. O. Angüner
Cosmic rays (CRs) are charged particles that arrive at Earth isotropically from all directions and interact with the atmosphere. The presence of a spectral knee feature seen in the…
Sensitivity of the Cherenkov Telescope Array to spectral signatures of hadronic PeVatrons with application to Galactic Supernova Remnants
The Cherenkov Telescope Array Consortium, F. Acero, A. Acharyya +356
The local Cosmic Ray (CR) energy spectrum exhibits a spectral softening at energies around 3~PeV. Sources which are capable of accelerating hadrons to such energies are called hadr…
Probing the star formation origin of gamma rays from 3FHL J1907.0+0713
T. Ergin, L. Saha, P. Bhattacharjee +5
Star-forming (SF) regions embedded inside giant molecular clouds (GMCs) are potential contributors to Galactic gamma rays. The gamma-ray source 3FHL J1907.0+0713 is detected with a…
Suzaku and Fermi view of the supernova remnant 3C 396
Aytap Sezer, Tulun Ergin, Nergis Cesur +4
3C 396 is a composite supernova remnant (SNR), consisting of a central pulsar wind nebula (PWN) and a bright shell in the west, which is known to be interacting with molecular clou…
Comprehensive Analysis of the Transient X-ray Pulsar MAXI J1409-619
Ç. K. Dönmez, M. M. Serim, S. Ç. İnam +3
We probe the properties of the transient X-ray pulsar MAXI J1409619 through \textit{RXTE} and \textit{Swift} follow up observations of the outburst in 2010. We are able to phase…
Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9
Aytap Sezer, Tulun Ergin, Ryo Yamazaki +2
We present the results from the Suzaku X-ray Imaging Spectrometer observation of the mixed-morphology supernova remnant (SNR) HB9 (G160.9+2.6). We discovered recombining plasma (RP…
A Suzaku X-ray study of the mixed-morphology supernova remnant Kes 69 and searching for its gamma-ray counterpart
Aytap Sezer, Tulun Ergin, Ryo Yamazaki +2
Kes 69 is a mixed-morphology (MM) supernova remnant (SNR) that is known to be interacting with molecular clouds based on 1720 MHz hydroxyl (OH) maser emission observations in the n…
Investigating the region of 3C 397 in High Energy Gamma rays
Pooja Bhattacharjee, Pratik Majumdar, Tulun Ergin +2
We investigate the supernova remnant (SNR) 3C 397 and its neighboring pulsar PSR J1906+0722 in high energy gamma rays by using nearly six years of archival data of {\it Large Area…
Recombining Plasma & Gamma-ray Emission in the Mixed-morphology Supernova Remnant 3C 400.2
T. Ergin, A. Sezer, H. Sano +2
3C 400.2 belongs to the mixed morphology supernova remnant class, showing center-filled X-ray and shell-like radio morphology. We present a study of 3C 400.2 with archival Suzaku a…
Suzaku Analysis of the Supernova Remnant G306.3-0.9 and the Gamma-ray View of Its Neighborhood
Aytap Sezer, Tulun Ergin, Ryo Yamazaki
We present an investigation of the supernova remnant (SNR) G306.30.9 using archival multi-wavelength data. The Suzaku spectra are well described by two-component thermal plasma…
Searching for Overionized Plasma in the Gamma-ray Emitting Supernova Remnant G349.70.2
Tülün Ergin, Aytap Sezer, Lab Saha +3
G349.70.2 is a supernova remnant (SNR) expanding in a dense medium of molecular clouds and interacting with clumps of molecular material emitting gamma rays. We analyzed the gam…
Fe-rich ejecta in the supernova remnant G352.7-0.1 with Suzaku
Aytap Sezer, Fatma Gok
In this work, we present results from a 201.6 ks observation of G352.70.1 by using the X-ray Imaging Spectrometer onboard {\it Suzaku} X-ray Observatory. The X-ray emissio…
Recombining Plasma in the Gamma-ray Emitting Mixed-Morphology Supernova Remnant 3C 391
Tülün Ergin, Aytap Sezer, Lab Saha +4
A group of middle-aged mixed-morphology (MM) supernova remnants (SNRs) interacting with molecular clouds (MC) has been discovered as strong GeV gamma-ray emitters by Large Area Tel…
Origin of gamma-ray emission in the shell of Cassiopeia A
L. Saha, T. Ergin, P. Majumdar +2
Non-thermal X-ray emission from the shell of Cassiopeia A (Cas A) has been an interesting subject of study, as it provides information about relativistic electrons and their accele…
Studying the Supernova Remnant G31.9+0.0 in Gamma and X-Rays
T. Ergin, A. Sezer, L. Saha +2
G31.9+0.0 (3C 391) is a Galactic mixed-morphology supernova remnant observed in GeV gamma rays by Fermi Gamma Ray Space Telescope's LAT (Fermi-LAT), as well as in the 0.3-10 keV X-…
The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anti-centre region
A. Sezer, F. Gok, E. Aktekin
We report the discovery of optical filamentary and diffuse emission from G182.4+4.3 using 1.5-m Russian-Turkish telescope. We present the optical CCD images obtained with Halpha fi…
A deep X-ray observation of supernova remnant G304.6+0.1 (Kes 17) with Suzaku
F. Gok, A. Sezer
In this paper, we present the analysis of a deep (99.6 ks) observation of G304.6 + 0.1 with the X-ray Imaging Spectrometer on board {\it Suzaku} satellite. The X-ray spectral data…
Suzaku study of centrally brightened supernova remnant G272.2-3.2
A. Sezer, F. Gok
In this work, the results from Suzaku observation of Galactic supernova remnant G272.2-3.2 are presented. Spectra of G272.2-3.2 are well fitted by a single-temperature variable abu…
Ejecta detection in the middle-aged Galactic supernova remnant G296.1-0.5 observed with Suzaku
F. Gok, A. Sezer
In this paper, we report the detection of ejecta in the middle-aged Galactic supernova remnant G296.1-0.5 with the X-ray Imaging Spectrometer onboard the Suzaku satellite. The spec…