You can give a value to one (or more) of the following searches criterium cluster name, RA, DEC, Radius, Flux, Luminosity, Temperature, Bibliography.
Note that the system will search for clusters and/or references
which correspond to ALL the criteria you give.
Criteria can be physical
(cluster name, RA, DEC, Radius, Flux, Luminosity, Temperature) or
bibliographic
(a list of keywords )
Query by file :
If you want to querry BAX for many clusters or arround many possitions, you have the possibility to browse a file containing a list, which name is free but should have the extension .txt (like myquerry.txt)
For the query By Name, the file should contain one
cluster name per line
Ex:
ABELL1656
RXJ0505.3-2849
RXJ12*
For the query By Position, the file should contain
one position and size per line with a semicolon (;)
as a separator :
Ex:
12h59mn48.7s ;27d58mn50s;10
76.33292;-28.81811;50
The name should be given following the NED format.
Examples of cluster name input:
For Abell clusters: ABELL0085, ABELL 0085, A85, A 85, a85, a 85, abell 0085, abell0085
Using wildcard '*" character will cause a template search (all clusters contained in BAX). If the wildcard character is used in front of a near cluster name, the list of synonyms for the specified cluster name are given (Ex: RX* will return all cluster name begining with RX). The '*' is not allowed within a word.
Some examples for non-Abell clusters:
Zwicky clusters : ZwCl 1021.0+0426
Clusters name with CL is used instead of the nomencalture ClG, CLG.
Is retrieved from NED and the reference therein . It can happen that the redshift is not available in NED database, in this case we search for it in the literature.
BASIC
DATA
: Only canonical
values of Fx, Lx and Tx are given. These
canonical values are choosen among
the most
precise one and/or the latest published measurements.
all
measurements
: gives all the measurements published in the literature.
Note
that Fx is given as originally quoted in the reference.
Note that the Hubble constant is
set
to H_o= 50km <s/Mpc and the
cosmological
matter density Omega_M = 1.0 |
Bibliography:
BAX searches in the bibliographic database by keywords. BAX returns the
bibliographic
references associated with at least one of the selected keyword.
The keywords are divided into 4 main categories :
Note In
the
"By parameters" query menu, the relation between the keywords from the
scrolling
menu ( Observatory) is an
OR relation. Inside the same checkbox list, the relation is
AND. The relation between the 4 lists (srolling menu and 3
checkboxes
lists) is AND.
The definition of each keyword is given in the following table.
Observatory | Ariel V, ASCA, BeppoSAX, Chandra, Einstein, EXOSAT, Ginga HEAO-1, ROSAT, Tenma, Uhuru, XMM |
Observational Techniques | X-Rays photometry, X-Rays
spectroscopy, X-Rays imaging, Spatially resolved spectroscopy, Optical, Lensing, UV, SZ, Radio |
Physical data | Meaning | |
Fx | unabsorbed X-ray flux in ROSAT band 0.1-2.4 keV in units 10 -12 ergs s -1cm-2 | |
Lbol | X-ray bolometric luminosity in units of 1044ergs s -1 | |
Lx | X-ray luminosity in the ROSAT band (0.1-2.4 keV) in 1044 ergs s -1 | |
M_gas | Gas mass in a radius r | |
M_tot | Total mass in a radius r | |
Tx | X-ray gas temperature in keV | |
Temperature profile | Radial profile of the X-ray gas temperature | |
Temperature map | X-ray temperature map | |
Abundance | metallicity | |
Abundance profile | Radial profile of the metallicity | |
Beta | is the slope of the gas density profile derived from the b-model fitting | |
Relative abundances | ex: [O/Fe], [Mg/Fe].... | |
Count rate | Counts rate in cps/s | |
R_c | Core radius | |
M_gas | Gas mass inside a given radius | |
M_tot | Total gravitating mass inside a given radius | |
M_dot | The mass deposited in the cluster center due to cooling flows | |
Sx profile | Surface brightness profile expresses in units of cts s-1 arcmin-2 | |
ne_o | Central gas density | |
Velocity dispersion | Velocity dispersion derived from radial velocities measurement | |
L_opt | Total optical luminosity | |
R_E | Einstein ring radius in lensing image | |
Shear | defines the lensing effect | |
Shocks | presence of shocks | |
Physical state | Meaning | |
Mergers | physical state of a cluster which is either in process of merging with a subcluster or which has experienced a merger (collision) | |
Morphology | defines the shape of a cluster (elongated, spherical, smooth, regular, irregular, etc...) | |
Cooling flows | presence of cooling flow | |
Ellipticity | defines the geometry of a cluster e=0 if a cluster is not elongated (spherical case) | |
X-Rays image | X-rays image obtained from the analysis of fits tables | |
Optical image | image obtained from optical observations | |
Substructure | inhomegeneities or presence of clumps in clusters |