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Mass Profile Calculation Tools
==============================
Junhua GU, Weitian LI, Zhenghao ZHU
Introduction
------------
This directory contains the tools/scripts used to calculate the mass profile
for our big Chandra ACIS sample of galaxy groups and clusters.
NOTE
----
* mass calculation references:
+ Walker et al. 2012, MNRAS, 422, 3503-3515
[ADS:2012MNRAS.422.3503W](http://adsabs.harvard.edu/abs/2012MNRAS.422.3503W)
+ Ettori et al. 2013, Space Science Reviews, 177, 119-154
[ADS:2013SSRv..177..119E](http://adsabs.harvard.edu/abs/2013SSRv..177..119E)
* Errors are calculated at 68% confident level.
* NFW profile is employed to extrapolate the mass profile.
* We use a self-proposed model (i.e., *wang2012* model) to describe/fit the gas
temperature profile.
* The single-beta and double-beta models (with a constant background) are used
to describe the gas density profile.
TODO
----
* to add compilation macro to make pgplot and X11 optional
* to merge the scripts/tools for single-beta and double-beta SBP models
(to reduce code duplications)
* the uncertainties/errors calculation **maybe** inappropriate/problematic
(e.g., ``analyze_mass_profile.py``)
why not just use the quantile-based (e.g., Q84.15-Q15.85 ~= 68.3%) uncertainties
or standard deviation ???
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