2015A&A...579A..69O


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:25:15

2015A&A...579A..69O - Astronomy and Astrophysics, volume 579A, 69-69 (2015/7-1)

Localising fast radio bursts and other transients using interferometric arrays.

OBROCKA M., STAPPERS B. and WILKINSON P.

Abstract (from CDS):

A new population of sources emitting fast and bright transient radio bursts (FRBs) has recently been identified. Their observed high dispersion measures suggests an extragalactic origin, and accurately determining their positions and distances will provide an opportunity to study the magneto-ionic properties of the intergalactic medium. So far, FRBs have all been found using large dishes equipped with multi-pixel arrays. While these dishes are well-suited to discovering transient sources, they are poor at providing accurate localisations. A 2D snapshot image of the sky, made with a correlation interferometer array, can accurately localise many compact radio sources simultaneously. However, the required time resolution and the need to detect them in real time makes this currently impractical. In a beam-forming approach many narrow tied-array beams (TABs) are produced and the advantages of single dishes and interferometers can be combined. We present a proof-of-concept analysis of a new non-imaging method that utilises the additional spectral and comparative spatial information obtained from multiply overlapping TABs to estimate a transient source location with up to arcsecond accuracy in almost real time. We demonstrate this for a variety of interferometric configurations, that is LOFAR and MeerKAT, and show that the estimated angular position may be sufficient for identifying a host galaxy or other related object, without reference to other simultaneous or follow-up observations. In cases where the position is less accurately determined, we can still significantly reduce the area that needs to be searched for associated emission at other wavelengths and from potential host galaxies.

Abstract Copyright:

Journal keyword(s): techniques: high angular resolution - techniques: interferometric - intergalactic medium

Simbad objects: 1

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Number of rows : 1

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:25:15

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
NAME Magellanic Clouds -- Group of Galaxies
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
GrG ()
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
03 00 00.0 -71 00 00 [ ] E ~
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
02 59 44.2 -71 11 49 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
289.3295 -42.5698 [ ]
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Some important notes on this object about identifications and objects associations.
notes:

  • see LMC & SMC


Hierarchy : number of linked objects
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: 24
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NAME Magellanic Clouds

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References (5669 between 1850 and 2020) (Total 5669)
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herschel : 37   

   


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2020.07.14-19:25:15

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