SDC2 HI-FRIENDS results¶

Our solution¶

For our solution we used this configuration file:

# General
threads: 31

# Cube selection
#incube: '/mnt/scratch/sdc2/data/evaluation/sky_eval.fits'
#incube: '/mnt/scratch/sdc2/data/development/sky_dev_v2.fits'
#incube: '/mnt/scratch/sdc2/data/development_large/sky_ldev_v2.fits'
incube: '/mnt/sdc2-datacube/sky_full_v2.fits'

# Splitting
subcube_id: 'all'
coord_file: results/plots/coord_subcubes.csv
grid_plot: results/plots/subcube_grid.png
num_subcubes: 36
pixel_overlap: 40

# Sofia
sofia_param: "config/sofia_12.par"
scfind_threshold: 4.5
reliability_fmin: 5.0
reliability_threshold: 0.5

The 36 subcubes were gridded following this pattern: Example of subcube grid

The distribution of sources in the sky was: Detected catalog

We detected 22346 sources (once duplicates in the overlapping regions are removed).

This is the distribution of parameters in our catalog (blue), and how does it compare with the truth catalog of the large development cube (in grey), which covers a smaller area and therefore contains fewer sources. Please, note the different binning and the log scale used in some cases.

Parameters distribution

We then filtered the catalog to exclude sources that deviate significantly from the Wang et al. 2016 (2016MNRAS.460.2143W) correlation between HI size in kpc (\(D_HI\)) and HI mass in solar masses (\(M_HI\)). This is the resulting catalog:

Filtered by D-M correlation

Our results for the SDC2 are published in Zenodo: see file hi-friends_solution.tgz in https://zenodo.org/badge/latestdoi/385866513

Score¶

The solution presented by HI-FRIENDS obtained a total score of 13902.62 points in the challenge. This is the final leaderboard from the SDC2 website.

leaderboard