Issue |
A&A
Volume 545, September 2012
|
|
---|---|---|
Article Number | A41 | |
Number of page(s) | 14 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361/201219555 | |
Published online | 05 September 2012 |
Online material
Appendix A: Notes on individual clusters
A851 – A851, the lowest redshift cluster in the sample
(z = 0.407), has been observed by EPIC XMM-Newton
for ~56 ks (ObsID: 0106460101), of which ~41 ks were useful for
scientific analysis after removing the periods of high flares. Its temperature profile
is quite flat in the central regions with a temperature of ~6 keV, showing a
significant decline only in the outer radial bin (r > 700 kpc). As
indicated by a value of , this cluster is classified as NCC.
RXCJ0856.1+3756 – RXCJ0856.1+3756 (z = 0.411) has
been observed by XMM for ~29 ks (ObsID: 0302581801), with ~24 ks available
for our analysis after cleaning the event files from soft proton flares. Although the
temperature profile consists of only four radial bins, a hint of a temperature drop in
the central bin (r < 170 kpc) is observed, although its value of
puts this cluster in the NCC category.
The temperature profile then declines from kT ≈ 9 keV down to
kT ≈ 5.5 keV) in the outer two bins
(r > 250 kpc).
RXJ2228.6+2037 – EPIC XMM-Newton observed the cluster
RXJ2228.6+2037 (z = 0.412) for a total of ~26 ks (ObsID:
0147890101), almost entirely useful for our analysis. Although a hint of a drop in the
temperature is observed in the central two radial bins
(r < 150 kpc), with kT ≈ 8 keV in the central
region, this cluster is classified as NCC (). The temperatures reaches its maximum
(kT ≈ 9 keV) at r ~ 200 kpc and then declines
smoothly down to ~4 keV at radii larger than ~850 kpc.
RXCJ1206.2-0848 – The cluster RXCJ1206.2-0848
(z = 0.440) has been observed twice by EPIC XMM-Newton
(ObsIds: 0302581901, 0502430401), but one of the two observation (ObsID:
0302581901) was heavily affected by soft proton flares and was therefore discarded. The
~30 ks of the other observation were almost entirely available for scientific
analysis. The temperature profile can be considered approximately constant around
kT ≈ 10 keV, although several fluctuations are observed in the
profile and the temperature shows a drop of ~3.5 keV between the center and the
adjacent radial bin. This cluster is classified as CC, presenting a value of
.
IRAS09104+4109 – IRAS09104+4109 (z = 0.442) has been
observed by EPIC XMM-Newton for a total of ~14 ks (~12 ks of
clean exposure time, ObsID: 0147671001). The temperature shows a hint of a temperature
drop in the center (ΔkT ~ 0.5 keV), and decreases from
~6.5 keV to ~4.5 keV between the region located at ~100 kpc from the
center and the one located at ~200 kpc, remaining constant around the latter value
going toward larger radii. This cluster shows a value of
and is therefore classified as NCC.
RXJ1347.5-1145 – RXJ1347.5-1145 (z = 0.451),
representing the brightest cluster in our sample with its X-ray luminosity of
4.2 × 1045 erg s-1 (0.1–2.4 keV band, Ebeling et al. 2010), has been observed for ~38 ks
(~32 ksec after cleaning for flares) by XMM-Newton (ObsID:
0112960101). This cluster shows evidence of a very strong cool core with the temperature
dropping from kT ≈ 13.5 keV to kT ≈ 10 keV in the
central bin (r < 90 kpc) and is classified as a CC cluster
(, the lowest value among the clusters in
our sample). Although some irregularities in the profile are present, the temperature
then declines smoothly toward the outer regions, reaching a value around ~6 keV at r > 750 kpc.
CLJ0030+2618 – The cluster CLJ0030+2618 (z = 0.500)
has been observed three times by XMM-Newton (ObsIds: 0302581101,
0402750201, 0402750601) for a total of ~94 ks, of which ~70 ks were
available after removing the high-flaring intervals. The number of counts available did
not allow us to divide the emission into more than three radial bins, with the
temperature profiles being approximately constant around ~5 keV. CLJ0030+2618 is
classified as a NCC cluster, as indicated by a .
MS0015.9+1609 – MS0015.9+1609 (z = 0.541) has been
observed twice by XMM (ObsIds: 0111000101, 0111000201) for a total of ~45 ks
(~36 ks of clean exposure time). The temperature profile declines smoothly from
kT ≈ 12 keV measured at the center down to a minimum of ~7 keV
observed as far as ~900 kpc from the center, making of it a clear example of a
NCC cluster ().
MS0451.6-0305 – The galaxy cluster MS0451.6-0305
(z = 0.550) has been observed by XMM-Newton (ObsId:
0205670101) for a total of ~45 ks. The observation was heavily affected by soft
proton flares and we were able to use only ~26 ks of the original exposure. The
observed temperature shows a drop in the central 200 kpc
(kT ~ 9 keV) and is then quite constant around ~11 keV
between 200 and 450 kpc. It then declines to ~6 keV at
r > 450 kpc. The value of measured for this cluster puts it in the
CC category.
MACSJ0647.7+7015 – EPIC XMM-Newton observed twice
(ObsIDs: 0551850401, 0551851301) the galaxy cluster MACSJ0647.7+7015
(z = 0.591) for a total of ~145 ks (~88 keV of clean
exposure time). The temperature observed in this cluster shows a smooth decline from the
center (kT ≈ 12 keV) toward the outskirts
(kT ≈ 6−7 keV at r > 450 kpc), making of it
another obvious example of NCC cluster ().
MACSJ0744.9+3927 – Two EPIC observations of the cluster of galaxy
MACSJ0744.9+3927 (z = 0.698) are present in the XMM-Newton
archive (ObsIDs: 0551850101, 0551851201) accounting for a total exposure time
of ~154 ks (~106 ks after cleaning for high-flaring periods).
MACSJ0744.9+3927 is another examples of strong CC present in our sample (as indicated
also by ), showing a temperature drop from
~10 keV (at ~150 kpc from the center) to ~7.5 keV in the central
radial bin (r < 100 kpc). The temperature smoothly declines toward
the outskirts and stabilizes around a value of ~6 keV at
r > 500 kpc.
CLJ1226.9+3332 – CLJ1226.9+3332, the farthest cluster in our sample
(z = 0.890), has been observed twice by EPIC XMM-Newton
(ObsIds: 0070340501, 0200340101) for a total of ~139 ks. Both observation
were heavily affected by soft proton flares (in particular ~75% of ObsID
0070340501 was affected by soft protons), leaving just ~77 ks of clean exposure
time available for scientific analysis. The temperature shows a sharp decline from the
center (kT ≈ 13 keV) toward the outer radial bin as far as
~500 kpc from the core (kT ≈ 6 keV). This cluster is classified
as a NCC ().
© ESO, 2012
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