act_dr6
================================================

Full Multi-Frequency primary CMB from ACT DR6 data including systematics and foregrounds.

+-------------+----------------------------------------------------------------+
| File        | likelihood/act-dr6/act_dr6_interface.py                        |
+-------------+----------------------------------------------------------------+
| Attribution | Xavier Garrido, Serena Giardiello, ACT Collaboration (Library) |
+-------------+----------------------------------------------------------------+
|             | Ian Harrison, CosmoSIS Team (Interface)                        |
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| URL         | https://github.com/ACTCollaboration/act_dr6_mflike             |
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| Citations   | https://arxiv.org/abs/2503.14452                               |
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Important note: please see https://github.com/ACTCollaboration/ACT-DR6-parameters/blob/main/theories/camb.yaml
for the default CAMB settings required for this likelihood to reproduce the published result. This also requires
the use of the CosmoRec recombination module which is not supplied by default in CAMB. This repo also specifies 
default priors for the likelihood, including the tau prior which should be used if no large scale CMB polarisation 
data (e.g. from Planck SRoll2) is included.

This is the full multi-frequency MFLike primary CMB likelihood from the ACT DR6 data release. This includes a 
full set of foreground and instrumental systematics modelling parameters. For a lighter version of the likelihood 
including only two nuisance parameters, which gives the same results in Lambda-CDM cosmologies, it is suggested to 
use the `lite' version also provided.
What is supplied here is only the CosmoSIS interface to the official Cobaya likelihood.
This should be obtainable through installing the Cobaya likelihood from the provided github repository.
The required data can be downloaded with the provided shell script.


Assumptions
-----------

 - act_dr6_mflike python module
 - ACT DR6 multi multi-frequency data



Setup Parameters
----------------

None


Input values
----------------

.. list-table::
   :header-rows: 1

   * - Section
     - Name
     - Type
     - Default
     - Description

   * - cmb_cl
     - tt
     - real 1d
     - 
     - Lensed CMB temperature power spectrum in ell(ell+1)/2pi units
   * - 
     - te
     - real 1d
     - 
     - Lensed CMB temperature-E-mode polarization cross power spectrum in ell(ell+1)/2pi units
   * - 
     - ee
     - real 1d
     - 
     - Lensed CMB E-mode polaration power spectrum in ell(ell+1)/2pi units
   * - act_params
     - A_act
     - real
     - 1.0
     - Overall ACT calibration parameter used to model residual systematics.
   * - 
     - P_act
     - real
     - 1.0
     - Overall ACT polarisation efficiency parameter used to model residual systematics.


Output values
----------------


.. list-table:: Output values
   :header-rows: 1

   * - Section
     - Name
     - Type
     - Description

   * - likelihoods
     - act_dr6_lite_like
     - real
     - ACT DR6 primary CMB-only likelihood for given selection