Transfer learning for galaxy feature detection: Finding Giant Star-forming Clumps in low redshift galaxies using Faster R-CNN

This repository contains the data released in the paper 'Transfer learning for galaxy feature detection: Finding Giant Star-forming Clumps in low redshift galaxies using Faster R-CNN' (DOI: 10.1093/rasti/rzae013).

We release a detailed catalogue of Giant Star-forming Clumps (GSFCs), detected for the full set of Galaxy Zoo: Clump Scout galaxies observed by SDSS using the Faster R-CNN architecture with the Zoobot classification-CNN as a feature extraction backbone.

The final models and code are made publicly available via Github: https://github.com/ou-astrophysics/Faster-R-CNN-for-Galaxy-Zoo-Clump-Scout.

We will release updates if needed via Zenodo versioning. We recommend using the latest version of this repository. You can check the version you are currently viewing on the right-hand sidebar.

Please cite the paper (DOI: 10.1093/rasti/rzae013) when using the data in this repository.

The csv-file FRCNN_Zoobot_SDSS_GZCS_detections.csv has the following columns. Alternatively, the file FRCNN_Zoobot_SDSS_GZCS_detections.gzip contains the same data but stored as a parquet-file.

Column name
Description

specobjid
SDSS spec object ID

dr7objid
SDSS DR7 object ID

clump_id
Clump index

clump_label_id
Clump label ID (1 or 2)

clump_label_name
Clump label name

clump_score
Detection score for the clump

clump_centre_ra
Clump centroid RA in degrees

clump_centre_dec
Clump centroid dec in degrees

clump_flux_u
Clump u-band flux in Jy

clump_flux_g
Clump g-band flux in Jy

clump_flux_r
Clump r-band flux in Jy

clump_flux_i
Clump i-band flux in Jy

clump_flux_z
Clump z-band flux in Jy

clump_flux_err_u
Clump u-band flux error in Jy

clump_flux_err_g
Clump g-band flux error in Jy

clump_flux_err_r
Clump r-band flux error in Jy

clump_flux_err_i
Clump i-band flux error in Jy

clump_flux_err_z
Clump z-band flux error in Jy

clump_mag_u
Clump u-band magnitude (AB-mag)

clump_mag_g
Clump g-band magnitude (AB-mag)

clump_mag_r
Clump r-band magnitude (AB-mag)

clump_mag_i
Clump i-band magnitude (AB-mag)

clump_mag_z
Clump z-band magnitude (AB-mag)

clump_ext_mag_u
Clump u-band extinction (E(B-V), AB-mag)

clump_ext_mag_g
Clump g-band extinction (E(B-V), AB-mag)

clump_ext_mag_r
Clump r-band extinction (E(B-V), AB-mag)

clump_ext_mag_i
Clump i-band extinction (E(B-V), AB-mag)

clump_ext_mag_z
Clump z-band extinction (E(B-V), AB-mag)

clump_mag_corr_u
Clump corrected u-band magnitude (AB-mag)

clump_mag_corr_g
Clump corrected g-band magnitude (AB-mag)

clump_mag_corr_r
Clump corrected r-band magnitude (AB-mag)

clump_mag_corr_i
Clump corrected i-band magnitude (AB-mag)

clump_mag_corr_z
Clump corrected z-band magnitude (AB-mag)

clump_mag_corr_u_g
Clump colour (u-g)

clump_mag_corr_g_r
Clump colour (g-r)

clump_mag_corr_r_i
Clump colour (r-i)

clump_mag_corr_i_z
Clump colour (i-z)

clump_flux_ratio
Est. clump/galaxy near-UV flux ratio (u-band)

is_clump_3pct
Flag (True/False) if clump/galaxy flux ratio is >3%

is_clump_8pct
Flag (True/False) if clump/galaxy flux ratio is >8%

galaxy_ra
Host galaxy RA in degrees

galaxy_dec
Host galaxy dec in degrees

galaxy_z
Host galaxy redshift

galaxy_mag_u
Host galaxy u-band magnitude (AB-mag)

galaxy_mag_g
Host galaxy g-band magnitude (AB-mag)

galaxy_mag_r
Host galaxy r-band magnitude (AB-mag)

galaxy_mag_i
Host galaxy i-band magnitude (AB-mag)

galaxy_mag_z
Host galaxy z-band magnitude (AB-mag)

galaxy_mag_err_u
Host galaxy u-band magnitude error (AB-mag)

galaxy_mag_err_g
Host galaxy g-band magnitude error (AB-mag)

galaxy_mag_err_r
Host galaxy r-band magnitude error (AB-mag)

galaxy_mag_err_i
Host galaxy i-band magnitude error (AB-mag)

galaxy_mag_err_z
Host galaxy z-band magnitude error (AB-mag)

galaxy_flux_u
Host galaxy u-band flux in Jy

galaxy_flux_g
Host galaxy g-band flux in Jy

galaxy_flux_r
Host galaxy r-band flux in Jy

galaxy_flux_i
Host galaxy i-band flux in Jy

galaxy_flux_z
Host galaxy z-band flux in Jy

galaxy_expAB_r
Host galaxy axis ratio from SDSS

galaxy_expRad_r
Host galaxy exponential fit scale radius from SDSS

galaxy_lmass
Host galaxy log mass in MSun

galaxy_lssfr
Host galaxy log specific SFR

galaxy_mag_corr_u
Host galaxy corrected u-band magnitude (AB-mag)

galaxy_mag_corr_g
Host galaxy corrected g-band magnitude (AB-mag)

galaxy_mag_corr_r
Host galaxy corrected r-band magnitude (AB-mag)

galaxy_mag_corr_i
Host galaxy corrected i-band magnitude (AB-mag)

galaxy_mag_corr_z
Host galaxy corrected z-band magnitude (AB-mag)