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Abell 2147

Galaxy cluster in the constellation Virgo

Field	Value
name	Abell 2147
image	ABELL 2147.png
epoch	J2000
constellation	Virgo
ra	{{cite web
url	http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+2147&extend=no
title	NED results for object ABELL 2147
publisher	NASA/IPAC Extragalactic Database (NED)
access-date	March 15, 2012
dec
richness	1{{cite journal
last1	Abell
first1	George O.
author-link1	George O. Abell
last2	Corwin
first2	Harold G. Jr.
author-link2	Harold G. Corwin
last3	Olowin
first3	Ronald P.
author-link3	Ronald P. Olowin
date	May 1989
title	A catalog of rich clusters of galaxies
journal	Astrophysical Journal Supplement Series
volume	70
issue	May 1989
pages	1–138
issn	0067-0049
bibcode	1989ApJS...70....1A
doi	10.1086/191333
doi-access	free
redshift	0.03500 (10 493 km/s)
distance	149 Mpc
flux	(53.20 ± 7.0%) erg s−1 cm−2 (0.1–2.4 keV)

Abell 2147 is a galaxy cluster in the Abell catalogue. It is located within the core of the Hercules Superclusters (SCI 160), within Serpens Caput, near the cluster Abell 2152, approximately two degrees south southwest of the Hercules Cluster (Abell 2151). It is possible that Abell 2147 is actually part of the Hercules Cluster considering that it shares the same redshift of 550 million light years.{{cite journal | author-link1 = Laura P. Bautz | access-date = April 1, 2012

This galaxy cluster contains mostly faint, small and scattered galaxies.

Radial Profile

The extraction regions were chosen based on an exposure corrected, combined GIS-2 and GIS-3 sky image. Reference sky coordinates from the literature were used as input to a centroid routine to determine the cluster center right ascension and declination. A radial emission profile was then constructed from this position. Note that this radial profile does not reflect the true cluster profile given the complicated PSF of the ASCA mirrors and the GIS detector. The background (and sigma of the background) was iterative determined by stepping inward from the end of the profile and averaging (using a three sigma clipping algorithm). The extraction region was chosen to be the radius at which the radial profile reached 5*sigma times the background level.

The radial profile is shown below. The red line is the background level. The blue line is the 5*sigma level. SIS extraction radii were set at 0.70 times the GIS extraction radius.

References

[http://www.pa.msu.edu/astro/MC2/accept/clusters/3211.html ABELL 2147] {{Webarchive. link. (2012-03-20 , Archive of Chandra Cluster Entropy Tables, Michigan State University, retrieved 2012-03-31.)
[http://www.astronomy-mall.com/Adventures.In.Deep.Space/agcnotes.htm Notes on Obscure Galaxy Clusters], San Francisco Amateur Astronomers, retrieved 2012-03-31.
"ABELL 2147 in 83074000".

Info: Wikipedia Source

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abell-objects galaxy-clusters virgo-(constellation) abell-richness-class-1 hercules-superclusters

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