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Tülün Ergin

Department of Physics
Suzaku and Fermi view of the supernova remnant 3C 396
Sezer, A.; Ergin, Tülün; Cesur, N.; Tanaka, S. J.; Kisaka, S.; Mira, Y.; Yamazaki, R. (Oxford University Press (OUP), 2020-02-01)
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 clouds (MCs). We present a study of X-ray emis...
Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9
Sezer, A.; Ergin, Tülün; Yamazaki, R.; Sano, H.; Fukui, Y. (2019-11-01)
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) in the western Suzaku observation region...
A Suzaku X-ray study of the mixed-morphology supernova remnant Kes 69 and searching for its gamma-ray counterpart
Sezer, A.; Ergin, Tülün; Yamazaki, R.; Ohira, Y.; Cesur, N. (Oxford University Press (OUP), 2018-11-01)
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 northeastern and southeastern regions. We p...
Recombining Plasma and Gamma-Ray Emission in the Mixed-morphology Supernova Remnant 3C 400.2
Ergin, Tülün; Sezer, A.; Sano, H.; Yamazaki, R.; Fukui, Y. (American Astronomical Society, 2017-06-10)
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 and Fermi-LAT observations. We find recombi...
Suzaku analysis of the supernova remnant G306.3-0.9 and the gamma-ray view of its neighbourhood
Sezer, A.; Ergin, Tülün; Yamazaki, R. (2017-04-01)
We present an investigation of the supernova remnant (SNR) G306.3-0.9, using archival multiwavelength data. The Suzaku spectra are well described by two-component thermal plasma models: the soft component is in ionization ...
Investigating the region of 3C 397 in High Energy Gamma rays
Bhattacharjee, Pooja; Majumdar, Pratik; Ergin, Tülün; Saha, Lab; Joarder, Partha S. (2017-02-24)
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 Large Area Telescope on board Fermi Gamma Ray Space Telesc...
Suzaku and Fermi observations of the supernova remnant G1.9+0.3
GÖK, FATMA; Ergin, Tülün (2015-10-15)
We present results from the observation of the supernova remnant (SNR) G1.9 + 0.3, which is the youngest known SNR in the Milky Way, with the X-ray imaging spectrometer (XIS) on board Suzaku. We investigate the nature of t...
Ergin, Tülün; Sezer, A.; Saha, L.; Majumdar, P.; GÖK, FATMA; ERCAN, ENİSE NİHAL (IOP Publishing, 2015-05-10)
G349.7+0.2 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 gamma-ray data of the Large Area Telescope on b...
Origin of gamma-ray emission in the shell of Cassiopeia A
Saha, L.; Ergin, Tülün; Majumdar, P.; Bozkurt, M.; Ercan, E. N. (EDP Sciences, 2014-03-01)
Context. 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 acceleration mechanisms in shocks. The ...
Locating the TeV gamma-rays from the shell regions of Cassiopeia A
Saha, Lab; Ergin, Tülün; Majumdar, Pratik; Bozkurt, Mustafa (2014-01-01)
We have analyzed Chandra X-ray data from different parts of the shell of young supernova remnant (SNR) in the energy range of 0.7 - 8 keV. We observed that X-ray flux level varies over different shell regions of the source...