scholarly journals Optical and X-ray observational search for the possible supernova remnant candidates in the nearby galaxy NGC 1569

2018 ◽  
Vol 481 (2) ◽  
pp. 2804-2812 ◽  
Author(s):  
E N Ercan ◽  
E Aktekin ◽  
N Cesur ◽  
A Tümer
Keyword(s):  
Supernova Remnant ◽  
Nearby Galaxy ◽  
X Ray ◽  
Ngc 1569

scholarly journals Optical observations of the nearby galaxy NGC 2366 through narrowband Hα and [SII] filters. Supernova remnants status

2019 ◽  
pp. 13-23 ◽  
Author(s):  
M.M. Vucetic ◽  
D. Onic ◽  
N. Petrov ◽  
A. Ciprijanovic ◽  
M.Z. Pavlovic
Keyword(s):  
Supernova Remnants ◽  
Supernova Remnant ◽  
Astronomical Observatory ◽  
Optical Observations ◽  
H Ii Regions ◽  
Nearby Galaxy ◽  
Irregular Galaxy ◽  
X Ray ◽  
Ratio Criterion

We present detection of 64 H II regions, three superbubbles and two optical supernova remnant (SNR) candidates in the nearby irregular galaxy NGC 2366. The SNR candidates were detected by applying [S II]/H? ratio criterion to observations made with the 2-m RCC telescope at Rozhen National Astronomical Observatory in Bulgaria. In this paper we report coordinates, diameters, H? and [S II] fluxes for detected objects across the two fields of view in the NGC 2366 galaxy. Using archival XMM-Newton observations we suggest possible X-ray counterparts of two optical SNR candidates. Also, we discard classification of two previous radio SNR candidates in this galaxy since they appear to be background galaxies.

scholarly journals Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9

2019 ◽  
Vol 489 (3) ◽  
pp. 4300-4310 ◽  
Author(s):  
A Sezer ◽  
T Ergin ◽  
R Yamazaki ◽  
H Sano ◽  
Y Fukui
Keyword(s):  
Supernova Remnant ◽  
Gamma Ray ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Large Area ◽  
Imaging Spectrometer ◽  
X Ray ◽  
East Region ◽  
X Ray Imaging ◽  
Collisional Ionization

ABSTRACT 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 scenarios to explain the origin of the RP emission based on the observational properties and concluded that the rarefaction scenario is a possible explanation for the existence of RP. In addition, the gamma-ray emission morphology and spectrum within the energy range of 0.2–300 GeV are investigated using 10 yr of data from the Fermi Large Area Telescope (LAT). The gamma-ray morphology of HB9 is best described by the spatial template of radio continuum emission. The spectrum is well fit to a log-parabola function and its detection significance was found to be 25σ. Moreover, a new gamma-ray point source located just outside the south-east region of the SNR’s shell was detected with a significance of 6σ. We also investigated the archival H i and CO data and detected an expanding shell structure in the velocity range of $-10.5$ and $+1.8$ km s−1 that is coinciding with a region of gamma-ray enhancement at the southern rim of the HB9 shell.

scholarly journals An X-ray characterization of the central region of the supernova remnant G332.5-5.6

2015 ◽  
Vol 583 ◽  
pp. A84 ◽  
Author(s):  
A. E. Suárez ◽  
J. A. Combi ◽  
J. F. Albacete-Colombo ◽  
S. Paron ◽  
F. García ◽  
...  
Keyword(s):  
Central Region ◽  
Supernova Remnant ◽  
X Ray

scholarly journals INFRARED AND X-RAY SPECTROSCOPY OF THE Kes 75 SUPERNOVA REMNANT SHELL: CHARACTERIZING THE DUST AND GAS PROPERTIES

2011 ◽  
Vol 745 (1) ◽  
pp. 46 ◽  
Author(s):  
Tea Temim ◽  
Patrick Slane ◽  
Richard G. Arendt ◽  
Eli Dwek
Keyword(s):  
Supernova Remnant ◽  
X Ray ◽  
Gas Properties

scholarly journals AN X-RAY AND RADIO STUDY OF THE VARYING EXPANSION VELOCITIES IN TYCHO’S SUPERNOVA REMNANT

2016 ◽  
Vol 823 (2) ◽  
pp. L32 ◽  
Author(s):  
Brian J. Williams ◽  
Laura Chomiuk ◽  
John W. Hewitt ◽  
John M. Blondin ◽  
Kazimierz J. Borkowski ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
X Ray

scholarly journals Discovery of X-Ray Emission from a Radio Supernova Remnant G352.7-0.1

1998 ◽  
Vol 50 (2) ◽  
pp. 249-255 ◽  
Author(s):  
Kenzo Kinugasa ◽  
Ken'ichi Torii ◽  
Hiroshi Tsunemi ◽  
Shigeo Yamauchi ◽  
Katsuji Koyama ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
X Ray

An X-ray expansion and proper motion study of the Magellanic Cloud Supernova Remnant J0509–6731 with the Chandra X-ray observatory

2018 ◽  
Vol 479 (2) ◽  
pp. 1800-1806 ◽  
Author(s):  
Quentin Roper ◽  
Miroslav Filipovic ◽  
Glenn E Allen ◽  
Hidetoshi Sano ◽  
Laurence Park ◽  
...  
Keyword(s):  
Proper Motion ◽  
Supernova Remnant ◽  
Magellanic Cloud ◽  
X Ray ◽  
Motion Study

Swift observations of gamma-ray bursts

2007 ◽  
Vol 365 (1854) ◽  
pp. 1119-1128 ◽  
Author(s):  
Neil Gehrels
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
Optical Observations ◽  
Nearby Galaxy ◽  
X Ray ◽  
Star Forming ◽  
Star Forming Regions ◽  
Other Information ◽  
Short Grbs

Since its launch on 20 November 2004, the Swift mission has been detecting approximately 100 gamma-ray bursts (GRBs) each year, and immediately (within approx. 90 s) starting simultaneous X-ray and UV/optical observations of the afterglow. It has already collected an impressive database, including prompt emission to higher sensitivities than BATSE, uniform monitoring of afterglows and a rapid follow-up by other observatories notified through the GCN. Advances in our understanding of short GRBs have been spectacular. The detection of X-ray afterglows has led to accurate localizations and the conclusion that short GRBs can occur in non-star-forming galaxies or regions, whereas long GRBs are strongly concentrated within the star-forming regions. This is consistent with the NS merger model. Swift has greatly increased the redshift range of GRB detection. The highest redshift GRBs, at z ∼5–6, are approaching the era of reionization. Ground-based deep optical spectroscopy of high redshift bursts is giving metallicity measurements and other information on the source environment to a much greater distance than other techniques. The localization of GRB 060218 to a nearby galaxy, and the association with SN 2006aj, added a valuable member to the class of GRBs with detected supernova.

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