Counts of Amplified Mass Elevations from Lensing with Ultrafast Simulations
Chieh-An Lin (CEA Saclay)
Camelus is a fast weak lensing peak count modeling in C. It provides a prediction on peak counts from input cosmological parameters.
Here is the summary of the algorithm:
- Sample halos from a mass function
- Assign density profiles, randomize their positions
- Compute the projected mass, add noise
- Make maps and create peak catalogues
For a more detailed description, please take a look at Lin & Kilbinger (2015a).
Please check the GitHub page of Camelus.
The following softwares are required:
Current release: Camelus v1.31
New features in v1.31 - Mar 22, 2016:
- Made installation more friendly by removing the dependency on cfitsio and mpi
- Added the routine for computing 1-halo & 2-halo terms of the convergence profile
- Flexible parameter space for PMC ABC
- Remove files: FITSFunctions.c/.h
New features in v1.3 - Dec 09, 2015:
- New files: constraint.c/.h
- Allowed multiscale peaks in one data vector
- Allowed a data matrix from several realizations
- Used the local galaxy density as the noise level in the S/N
- Increased the parameter dimension for PMC ABC
- Changed the summary statistic options for PMC ABC
New features in v1.2 - Apr 06, 2015:
- Improved the computation speed by a factor of 6~7
- Converted the halo array structure into a binned structure, called "halo_map"
- Converted the galaxy tree structure into a binned structure, called "gal_map"
- Added the population Monte Carlo approximate Monte Carlo (PMC ABC) algorithm
New features in v1.1 - Jan 19, 2015:
- Fixed the bug from calculating halo radii
New features in v1.0 - Oct 24, 2014:
- Fast weak lensing peak count modeling
- Bartelmann & Schneider (2001). Phys. Rep., 340, 291.
- Fan et al. (2010). ApJ, 719, 1408.
- Lin & Kilbinger (2015a). A&A, 576, A24.
- Lin & Kilbinger (2015b). Submitted to A&A.
- Marin et al. (2011).
- Takada & Jain (2003a). MNRAS, 340, 580.
- Weyant et al. (2013). ApJ, 764, 116.
Please feel free to send questions, feedback and bug reports to chieh-an.lin AT cea DOT fr.
Last updated Jun 26, 2015.