J/A+A/551/A24 GMRT Radio Halo Cluster Survey diffuse sources (Venturi+, 2013)
Low frequency follow up of radio halos and relics in the GMRT Radio Halo Cluster
Survey.
Venturi T., Giacintucci S., Dallacasa D., Cassano R., Brunetti G.,
Macario G., Athreya R.
<Astron. Astrophys. 551, A24 (2013)>
=2013A&A...551A..24V 2013A&A...551A..24V
ADC_Keywords: Surveys ; Radio sources ; Morphology
Keywords: radio continuum: galaxies - galaxies: clusters: general -
Abstract:
To gain further insight on the origin of diffuse radio sources in
galaxy clusters and their connection with cluster merger processes, we
performed GMRT low frequency observations of the radio halos, relics
and new candidates belonging to the GMRT Radio Halo Cluster Sample
first observed at 610MHz. Our main aim was to investigate their
observational properties and integrated spectrum at frequencies below
610MHz.
Description:
High sensitivity imaging was performed using the GMRT at 325MHz and
240MHz. The properties of the diffuse emission in each cluster were
compared to our 610MHz images and/or literature information available
at other frequencies, in order to derive the integrated spectra over a
wide frequency range.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 11 Clusters observed with the GMRT
table2.dat 45 7 Details of the GMRT observations presented in
this paper
table3.dat 68 24 Properties of the discrete radio sources
table4.dat 63 17 Properties of the diffuse cluster sources in the
GMRT Radio Halo Survey
table5.dat 27 3 Candidate diffuse cluster emission
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Cluster Cluster name
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 26 F4.1 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 36 I2 arcsec DEs Declination (J2000)
38- 42 F5.3 --- z Redshift
44- 54 A11 --- Type Type(s) of source (1)
56- 60 A5 --- Ref [a-i, ] Reference codes (2)
62- 66 F5.3 kpc/arcsec+2 Scale Conversion angular to linear scale
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Note (1): Types are abbreviated as:
GRH = Giant Radio Halo
RH = Radio Halo
Rel = Relic
Cand = Candidate
D Rel = Double Relic
Note (2): References as follows:
a = This paper
b = Giacintucci et al., 2008A&A...486..347G 2008A&A...486..347G
c = Brunetti et al., 2008Natur.455..944B 2008Natur.455..944B
d = Dallacasa et al., 2009ApJ...699.1288D 2009ApJ...699.1288D
e = Macario et al., 2010A&A...517A..43M 2010A&A...517A..43M
f = Venturi et al., 2011MNRAS.414L..65V 2011MNRAS.414L..65V
g = Venturi et al., 2011JApA...32..501V 2011JApA...32..501V
h = Mazzotta et al., 2011MmSAI..82..495M 2011MmSAI..82..495M
i = Giacintucci et al., 2009A&A...505...45G 2009A&A...505...45G
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Cluster Cluster name
17- 19 I3 MHz nu Observing Frequency (240 or 325)
21- 22 I2 MHz Dnu Observing Bandwidth (8 or 32)
23 A1 --- n_Dnu [a] Analysis from USB (1)
25- 26 I2 h Time [6/10] Observing Time
28- 31 F4.1 arcsec HPBW1 Half-power beamwidth of the full array
(Restoring beam)
32 A1 --- --- [x]
33- 36 F4.1 deg HPBW2 Half-power beamwidth of the full array
(Restoring beam)
38- 40 I3 deg PA [-90/90] Position angle of the full array
(Restoring beam)
42- 45 F4.2 mJy Noise 1σ noise of the final image (in mJy/beam)
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Note (1): a: the observations were carried out using a total bandwidth of
32 MHz (USB+LSB, upper side bound and lower side bound), but only the
USB was used for the analysis.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 -- Cluster Cluster name
17- 18 A2 -- Src Radio Source name as in the paper
19 A1 --- n_RAh [a] a: coordinates of the radio peak
21- 22 I2 h RAh Right ascension (J2000)
24- 25 I2 min RAm Right ascension (J2000)
27- 30 F4.1 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 40 I2 arcsec DEs Declination (J2000)
42- 46 F5.1 mJy Fpeak Source peak flux at 325MHz (in mJy/beam) (1)
47 A1 --- n_Fpeak [bd ] Note on Fpeak measure (1)
49- 55 F7.2 mJy Ftot Source total flux at 325MHz
57- 59 F3.1 mJy e_Ftot ? rms uncertainty on Ftot
60- 62 A3 --- n_Ftot [b,d ] Notes on Ftot measure (2)
64- 68 F5.1 mJy Ftot2 ? For A1300 A2, total flux at 325MHz for the
bridge between A1 and A2
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Note (1): the uncertainty in the flux density measurements is 5%
Note (2): Notes as follows:
b = measured using TVSTAT
d = this value includes the E tail
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Cluster Cluster name
17 A1 --- r_Cluster [bcdef] Reference (1)
19- 29 A11 --- Type Classification of radio source (2)
31- 33 I3 MHz nu Observing Frequency ν (240 or 325)
35- 37 I3 mJy Snu Flux density
39- 40 I2 mJy e_Snu Error on flux density
41 A1 --- n_Snu [a] a: The value should be considered a
lower limit
43- 48 F6.3 10+25W/Hz Pnu Radio power
50- 52 F3.1 Mpc LLS ? Largest linear scale
53 A1 --- n_LLS [a] a: The value should be considered a
lower limit
55- 58 F4.1 arcsec HPBW1 Half-power beamwidth (Restoring Beam)
59 A1 --- --- [x]
60- 63 F4.1 arcsec HPBW2 Half-power beamwidth (Restoring Beam)
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Note (1): References as follows:
b = Brunetti et al., 2008Natur.455..944B 2008Natur.455..944B
c = Giacintucci et al. 2008A&A...486..347G 2008A&A...486..347G
d = Macario et al., 2010A&A...517A..43M 2010A&A...517A..43M
e = Venturi et al., 2011MNRAS.414L..65V 2011MNRAS.414L..65V
f = Giacintucci et al., 2009A&A...505...45G 2009A&A...505...45G
Note (2): Radio source type as follows:
GRH = giant radio halo
Rel = relic
Cand. Rel = candidate relic
Diff. Comp. = diffuse component
W Rel = Western Relic
E Rel = Eastern Relic
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Cluster Cluster name
7 A1 --- Ref [abc] References (1)
9- 14 A6 --- Type Candidate radio source type
16- 18 I3 MHz nu Observing Frequency ν (240, 325 or 610)
20 A1 --- l_Snu [~] limit flag on Snu
21- 24 F4.1 mJy Snu Estimated flux density
25 A1 --- --- [-]
26- 27 I2 mJy Snu2 ? Upper value of estimated flux density
interval
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Note (1): References as follows:
a = Venturi et al., 2011MNRAS.414L..65V 2011MNRAS.414L..65V
b = Venturi et al., 2011JApA...32..501V 2011JApA...32..501V
c = Venturi et al., 2008A&A...484..327V 2008A&A...484..327V
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Acknowledgements:
Tiziana Venturi, tventuri (at)ira.inaf.it
(End) Patricia Vannier [CDS] 13-Nov-2012