J/A+A/607/A4 PLCK G004.5-19.5 images at 150, 325 and 610MHz (Albert+, 2017)
Complex diffuse emission in the z=0.52 cluster PLCK G004.5-19.5.
Albert J.G., Sifon C., Stroe A., Mernier F., Intema H.T.,
Rottgering H.J.A., Brunetti G.
<Astron. Astrophys. 607, A4 (2017)>
=2017A&A...607A...4A 2017A&A...607A...4A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources
Keywords: galaxies: clusters: individual: PLCK G004.5-19.5 -
galaxies: clusters: intracluster medium -
X-rays: galaxies: clusters - large-scale structure of universe -
radiation mechanisms: non-thermal
Abstract:
We present radio observations of the galaxy cluster PLCK G004.5-19.5
(z=0.52) using the Giant Metrewave Radio Telescope at 150MHz, 325MHz,
and 610MHz. We find an unusual arrangement of diffuse radio emission
in the center and periphery of the cluster, as well as several radio
galaxies with head-tail emission. A patch of peripheral emission
resembles a radio relic, and central emission resembles a radio halo.
Reanalysis of archival XMM-Newton X-ray data shows that PLCK
G004.5-19.5 is disturbed, which has a known correlation with the
existence of radio relics and halos. Given that the number of known
radio halos and radio relics at z>0.5 is very limited, PLCK
G004.5-19.5 is an important addition to understanding merger-related
particle acceleration at higher redshifts.
Description:
We carried out a set of observations on PLCK G004.5-19.5 using the
GMRT at 150MHz, 325MHz (PI: A. Stroe, Project: 27_051), and 610MHz
(PI: C. Sifon, Project: 25_036) with total times on source of 445min.,
390min., and 798min. We performed 15 min. observations on flux
calibrators 3C 48 and 3C 286 at the start and end of the observation
session
Objects:
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RA (2000) DE Designation(s)
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19 16 54 -33 30.5 PLCK G004.5-19.5 = PLCKESZ G004.5-19.5
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 152 3 List of fits images
fits/* . 3 Individual images
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 33 F4.1 arcsec Beam1 Final beam
35- 38 F4.1 arcsec Beam2 Final beam
40- 44 F5.3 mJy/beam rms Background rms
46- 51 A6 --- Code GMRT project code
53- 78 A26 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.ssssss)
80- 86 F7.4 GHz Freq Observed frequency
88- 93 I6 Kibyte size Size of FITS file
95-114 A20 --- FileName Name of FITS file, in subdirectory fits
116-152 A37 --- Title Title of the FITS file (1)
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Note (1): Multiscale, multi-frequency CLEAN performed.
Fits file created by Casa v4.5.x of a Stokes I observation of PLCK G004.5-19.5.
Source peeling and atmostpheric modeling code by H.T. Intema.
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Acknowledgements:
Joshua Albert, albert(at)strw.leidenuniv.nl
(End) Patricia Vannier [CDS] 04-Oct-2017