The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anticentre region

Sezer, A.
Aktekin, E.
We report the discovery of optical filamentary and diffuse emission from G182.4+4.3 using the 1.5-m Russian-Turkish telescope. We present the optical CCD images obtained with the H alpha filter, revealing the presence of mainly filamentary structure to the north-west and filamentary and diffuse structure in the centre, south and north regions of the remnant. The bright optical filaments located in the north-west and south regions are well correlated with the prominent radio shell of the remnant, strongly suggesting an association. From the flux-calibrated CCD imaging, the average [S II]/H alpha ratio is found to be similar to 0.9 and similar to 1.1 for south and north-west regions, respectively, which clearly indicates that the emission originates from shock-heated gas. We also present the results of X-ray data obtained from XMM-Newton, showing diffuse emission with a very low luminosity of similar to 7.3 x 10(31) erg s(-1) at a distance of 3 kpc in the 0.3-10 keV energy band. Furthermore, we find a surprisingly low age of similar to 4400 yr for this remnant, given its large radius of similar to 22 pc.


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 and the spectra here are well described by a model having collisional ionization equilibrium (CIE) and RP components. On the other hand, the X-ray spectra from the eastern Suzaku observation region are best reproduced by the CIE and non-equilibrium ionization model. We discuss possible sc...
Ergin, Tülün; Sezer, A.; Saha, L.; Majumdar, P.; Chatterjee, A.; Bayirli, A.; Ercan, E. N. (2014-07-20)
A group of middle-aged mixed-morphology (MM) supernova remnants (SNRs) interacting with molecular clouds (MCs) has been discovered to be strong GeV gamma-ray emitters by the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope (Fermi-LAT). The recent observations of the Suzaku X-ray satellite have revealed that some of these interacting gamma-ray-emitting SNRs, such as IC443, W49B, W44, and G359.1-0.5, have overionized plasmas. 3C 391 (G31.9+ 0.0) is another GalacticMMSNR interacting with...
Suzaku observation of the Galactic supernova remnant CTB 37A (G348.5+0.1)
Sezer, A.; GÖK, FATMA; Hudaverdi, M.; ERCAN, ENİSE NİHAL (2011-10-01)
In this paper, we present the results of the observations of CTB 37A obtained with the X-ray imaging spectrometer onboard the Suzaku satellite. The X-ray spectrum of CTB 37A is fitted well by two components: a single-temperature ionization equilibrium component (VMEKAL), with solar abundances, an electron temperature of kTe similar to 0.6 keV and an absorbing column density of NH similar to 3 x 1022 cm-2, and a power-law component with a photon index of G similar to 1.6. The X-ray spectrum of CTB 37A is cha...
The optical spectroscopic and photometric observations of the optical counterparts to the be/x-ray binary systems: gro j2058+42 and v0332+53
Özbey, Mehtap; Kızıloğlu, Ümit; Department of Physics (2008)
The spectroscopic and photometric observations of the optical counterparts to the Be/X-ray binary systems GRO J2058+42 and V0332+53 (BQ Cam), taken with RTT150 (Russian-Turkish 1.5 meter Telescope), are presented in this study. The distance, color and the reddening estimates for both sources, obtained via photometric observations, are consistent with the previous results. The results of our spectroscopic observations performed between May 2006 and June 2008 for optical counterpart to GRO J2058+42 indicate t...
The XMM-Newton detection of extended emission from the nova remnant of T Pyxidis
Balman, Şölen (Oxford University Press (OUP), 2010-05-01)
We report the detection of an extended X-ray nebulosity with an elongation from north-east to south-west in excess of 15 arcsec in a radial profile and imaging of the recurrent nova T Pyx using the archival data obtained with the X-ray Multi-Mirror Mission (XMM-Newton), European Photon Imaging Camera (pn instrument). The signal-to-noise ratio in the extended emission (above the point source and the background) is 5.2 over the 0.3-9.0 keV energy range and 4.9 over the 0.3-1.5 keV energy range. We calculate a...
Citation Formats
A. Sezer, F. GÖK, and E. Aktekin, “The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anticentre region,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, pp. 1168–1174, 2012, Accessed: 00, 2020. [Online]. Available: