scholarly journals The ASKAP EMU Early Science Project: radio continuum survey of the Small Magellanic Cloud

2019 ◽  
Vol 490 (1) ◽  
pp. 1202-1219 ◽  
Author(s):  
T D Joseph ◽  
M D Filipović ◽  
E J Crawford ◽  
I Bojičić ◽  
E L Alexander ◽  
...  
Keyword(s):  
Point Source ◽  
High Sensitivity ◽  
Magellanic Cloud ◽  
Point Sources ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Small Magellanic Cloud ◽  
Science Project ◽  
New Radio ◽  
Low Surface Brightness

ABSTRACT We present two new radio continuum images from the Australian Square Kilometre Array Pathfinder (ASKAP) survey in the direction of the Small Magellanic Cloud (SMC). These images are part of the Evolutionary Map of the Universe (EMU) Early Science Project (ESP) survey of the Small and Large Magellanic Clouds. The two new source lists produced from these images contain radio continuum sources observed at 960 MHz (4489 sources) and 1320 MHz (5954 sources) with a bandwidth of 192 MHz and beam sizes of 30.0 × 30.0 arcsec2 and 16.3 × 15.1 arcsec2, respectively. The median root mean square (RMS) noise values are 186 $\mu$Jy beam−1 (960 MHz) and 165 $\mu$Jy beam−1 (1320 MHz). To create point source catalogues, we use these two source lists, together with the previously published Molonglo Observatory Synthesis Telescope (MOST) and the Australia Telescope Compact Array (ATCA) point source catalogues to estimate spectral indices for the whole population of radio point sources found in the survey region. Combining our ASKAP catalogues with these radio continuum surveys, we found 7736 point-like sources in common over an area of 30 deg2. In addition, we report the detection of two new, low surface brightness supernova remnant candidates in the SMC. The high sensitivity of the new ASKAP ESP survey also enabled us to detect the bright end of the SMC planetary nebula sample, with 22 out of 102 optically known planetary nebulae showing point-like radio continuum emission. Lastly, we present several morphologically interesting background radio galaxies.

scholarly journals New 20-cm radio-continuum study of the Small Magellanic Cloud, part II: Point sources

2011 ◽  
pp. 103-106 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
N.F.H. Tothill ◽  
Horta de ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Magellanic Cloud ◽  
Point Sources ◽  
Radio Continuum ◽  
Small Magellanic Cloud

We present a new catalogue of radio-continuum sources in the field of the Small Magellanic Cloud (SMC). This catalogue contains sources previously not found in 2370 MHz (?=13 cm) with sources found at 1400 MHz (?=20 cm) and 843 MHz (?=36 cm). 45 sources have been detected at 13 cm, with 1560 sources at 20 cm created from new high sensitivity and resolution radio-continuum images of the SMC at 20 cm from paper I. We also created a 36 cm catalogue to which we listed 1689 radio-continuum sources.

scholarly journals Radio continuum emission from the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 31-35
Author(s):  
U. Klein ◽  
R.F. Haynes ◽  
R. Wielebinski ◽  
S.R. Wayte ◽  
J.I. Harnett ◽  
...  
Keyword(s):  
Linear Polarization ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Small Magellanic Cloud ◽  
Future Studies ◽  
Continuum Spectrum ◽  
New Radio

New radio continuum surveys of the Large and the Small Magellanic Cloud have been completed recently at four frequencies, using the Parkes 64-m telescope. Here we shall discuss briefly the overall radio morphology of the Clouds at different frequencies and discuss the detected linear polarization. A preliminary integrated radio continuum spectrum of the Large Magellanic Cloud is also presented. Various aspects of future studies will be outlined.

scholarly journals New 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud - part II: Point source catalogue

2012 ◽  
pp. 93-95 ◽  
Author(s):  
G.F. Wong ◽  
E.J. Crawford ◽  
M.D. Filipovic ◽  
Horta de ◽  
N.F.H. Tothill ◽  
...  
Keyword(s):  
Point Source ◽  
High Sensitivity ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Small Magellanic Cloud

We present two new catalogues of radio-continuum sources in the field of the Small Magellanic Cloud (SMC). These catalogues contain sources found at 4800 MHz (?=6cm) and 8640 MHz (?=3cm). Some 457 sources have been detected at 3cm with 601 sources at 6cm created from new high-sensitivity and resolution radio-continuum images of the SMC from Crawford et al. (2011).

scholarly journals New 20-cm radio-continuum study of the small Magellanic cloud: Part I. Images

2011 ◽  
pp. 43-52 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
Horta de ◽  
T. Galvin ◽  
...  
Keyword(s):  
Radio Telescope ◽  
High Sensitivity ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Archival Data ◽  
Small Magellanic Cloud ◽  
Extended Structure ◽  
Future Studies ◽  
Compact Array

We present and discuss new high-sensitivity and resolution radiocontinuum images of the Small Magellanic Cloud (SMC) at ?=20 cm (?=1.4 GHz). The new images were created by merging 20-cm radio-continuum archival data, from the Australian Telescope Compact Array and the Parkes radio-telescope. Our images span from ?10"to ?150" in resolution and sensitivity of r.m.s.?0.5 mJy/beam. These images will be used in future studies of the SMC?s intrinsic sources and its overall extended structure.

scholarly journals SMC SMP 24: A newly radio-detected planetary nebula in the small Magellanic cloud

2010 ◽  
pp. 63-68 ◽  
Author(s):  
I.S. Bojicic ◽  
M.D. Filipovic ◽  
E.J. Crawford
Keyword(s):  
Planetary Nebula ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Small Magellanic Cloud ◽  
Radio Observations ◽  
Radio Data ◽  
Continuum Image ◽  
New Radio ◽  
Multi Wavelength

In this paper we report a new radio-continuum detection of an extragalactic planetary nebula (PN): SMC SMP 24. We show the radio-continuum image of this PN and present the measured radio data. The newly reduced radio observations are consistent with the multi-wavelength data and derived parameters found in the literature. SMC SMP 24 appears to be a young and compact PN, optically thick at frequencies below 2 GHz.

A high-sensitivity survey of radio continuum emission from Herbig Ae/Be stars

1993 ◽  
Vol 87 ◽  
pp. 217 ◽  
Author(s):  
Stephen L. Skinner ◽  
Alexander Brown ◽  
Ron T. Stewart
Keyword(s):  
High Sensitivity ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Be Stars

scholarly journals On the geometry of the X-ray emission from pulsars: the changing aspect of the Be/X-ray pulsar SXP348

2019 ◽  
Vol 486 (3) ◽  
pp. 3248-3258
Author(s):  
R Cappallo ◽  
S G T Laycock ◽  
D M Christodoulou ◽  
M J Coe ◽  
A Zezas
Keyword(s):  
Binary System ◽  
Point Source ◽  
Geometric Model ◽  
Magellanic Cloud ◽  
High Mass ◽  
Small Magellanic Cloud ◽  
X Ray ◽  
Spin Period ◽  
The Past ◽  
Model Fits

ABSTRACT The X-ray source SXP348 is a high-mass X-ray binary system in the Small Magellanic Cloud. Since its 1998 discovery by BeppoSAX, this pulsar has exhibited a spin period of ∼340−350 s. In an effort to determine the orientation and magnetic geometry of this source, we used our geometric model Polestar to fit 71 separate pulse profiles extracted from archival Chandra and XMM-Newton observations over the past two decades. During 2002, pulsations ceased being detectable for nine months despite the source remaining in a bright state. When pulsations resumed, our model fits changed, displaying a change in accretion geometry. Furthermore, in 2006, detectable pulsations again ceased, with 2011 marking the last positive detection of SXP348 as a point source. These profile fits will be released for public use as part of the database of Magellanic Cloud pulsars.

scholarly journals AKARI Near- to Mid-Infrared Imaging and Spectroscopic Observations of the Small Magellanic Cloud. I Bright Point Source List

2010 ◽  
Vol 62 (2) ◽  
pp. 273-286 ◽  
Author(s):  
Yoshifusa Ita ◽  
Takashi Onaka ◽  
Toshihiko Tanabé ◽  
Noriyuki Matsunaga ◽  
Mikako Matsuura ◽  
...  
Keyword(s):  
Point Source ◽  
Infrared Imaging ◽  
Magellanic Cloud ◽  
Bright Point ◽  
Small Magellanic Cloud ◽  
Mid Infrared ◽  
Spectroscopic Observations

scholarly journals New 20-cm radio-continuum study of the small Magellanic cloud - part III: Compact Hii regions

2012 ◽  
pp. 53-64 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
N.F.H. Tothill ◽  
Horta de ◽  
...  
Keyword(s):  
Hii Regions ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Spectral Indices ◽  
Emission Mechanism ◽  
Small Magellanic Cloud ◽  
Southwestern Part ◽  
Continuum Image ◽  
Compact Array ◽  
Compact Hii Regions

We present and discuss a new catalogue of 48 compact Hii regions in the Small Magellanic Cloud (SMC) and a newly created deep 1420 MHz (?=20 cm) radio-continuum image of the N19 region located in the southwestern part of the SMC. The new images were created by merging 1420 MHz radiocontinuum archival data from the Australian Telescope Compact Array. The majority of these detected radio compact Hii regions have rather flat spectral indices which indicates, as expected, that the dominant emission mechanism is of thermal nature.

scholarly journals New 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud, Part I: The maps

2011 ◽  
pp. 95-102 ◽  
Author(s):  
E. Crawford ◽  
M.D. Filipovic ◽  
Horta de ◽  
G.F. Wong ◽  
N.F.H. Tothill ◽  
...  
Keyword(s):  
Radio Source ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Source Population ◽  
Small Magellanic Cloud ◽  
Extended Structure ◽  
Future Studies

We present new 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud (SMC), created with the "peeling" technique and a joint deconvolution. The maps have resolutions of 3000 and 2000 and r.m.s., noise of 0.7 and 0.8 mJy/beam at 6 and 3 cm, respectively. These maps will be used for future studies of the SMC's radio source population and overall extended structure.

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