Dataset for Probing large-scale structures with the 2-point function and the power spectrum: insights into cosmic clustering evolution

This repository contains the dataset used in the paper: Franco, Camila; Avila, Felipe; Bernui, Armando (2025), Probing large-scale structures with the 2-point function and the power spectrum: insights into cosmic clustering evolution. Repository structureThe data are organized into two main directories:raw/└── Table_star_forming_galaxies.csv processed/├── a1/│ ├── sdss_blue_RA_117-157_DEC_48-64_z_0.00-0.06.dat│ └── sdss_blue_RA_117-157_DEC_48-64_z_0.06-0.12.dat├── a2/│ ├── sdss_blue_RA_117-157_DEC_32-48_z_0.00-0.06.dat│ └── sdss_blue_RA_117-157_DEC_32-48_z_0.06-0.12.dat├── a3/│ ├── sdss_blue_RA_117-157_DEC_16-32_z_0.00-0.06.dat│ └── sdss_blue_RA_117-157_DEC_16-32_z_0.06-0.12.dat├── a4/│ ├── sdss_blue_RA_122-157_DEC_0-16_z_0.00-0.06.dat│ └── sdss_blue_RA_122-157_DEC_0-16_z_0.06-0.12.dat├── a5/│ ├── sdss_blue_RA_157-197_DEC_48-64_z_0.00-0.06.dat│ └── sdss_blue_RA_157-197_DEC_48-64_z_0.06-0.12.dat├── a6/│ ├── sdss_blue_RA_157-197_DEC_32-48_z_0.00-0.06.dat│ └── sdss_blue_RA_157-197_DEC_32-48_z_0.06-0.12.dat├── a7/│ ├── sdss_blue_RA_157-197_DEC_16-32_z_0.00-0.06.dat│ └── sdss_blue_RA_157-197_DEC_16-32_z_0.06-0.12.dat├── a8/│ ├── sdss_blue_RA_157-197_DEC_0-16_z_0.00-0.06.dat│ └── sdss_blue_RA_157-197_DEC_0-16_z_0.06-0.12.dat├── a9/│ ├── sdss_blue_RA_197-237_DEC_48-64_z_0.00-0.06.dat│ └── sdss_blue_RA_197-237_DEC_48-64_z_0.06-0.12.dat├── a10/│ ├── sdss_blue_RA_197-237_DEC_32-48_z_0.00-0.06.dat│ └── sdss_blue_RA_197-237_DEC_32-48_z_0.06-0.12.dat├── a11/│ ├── sdss_blue_RA_197-237_DEC_16-32_z_0.00-0.06.dat│ └── sdss_blue_RA_197-237_DEC_16-32_z_0.06-0.12.dat└── a12/├── sdss_blue_RA_197-237_DEC_0-16_z_0.00-0.06.dat└── sdss_blue_RA_197-237_DEC_0-16_z_0.06-0.12.dat raw → Contains the initial catalogue of star-forming galaxies from SDSS. processed → Contains the subsets of blue galaxies used in the analysis. - Each subdirectory (`a1/`, `a2/`,...) corresponds to a different sky region. - Each region contains two files, representing two redshift shells: - `z_0.00-0.06` (Shell 1) - `z_0.06-0.12` (Shell 2) File format and columns1. Id_SDSS_spec_DR8** – Spectroscopic identifier in SDSS DR8 2. RA – Right Ascension (degrees) 3. DEC – Declination (degrees) 4. Abs_u – Absolute magnitude in u band 5. Error_Abs_u – Uncertainty in Abs_u 6. Abs_u_intrinsic_ext_corr – u-band absolute magnitude corrected for intrinsic extinction 7. Error_Abs_u_intrinsic_ext_corr – Uncertainty of the extinction-corrected u value 8. Abs_g – Absolute magnitude in g band 9. Error_Abs_g – Uncertainty in Abs_g 10. Abs_g_intrinsic_ext_corr – g-band absolute magnitude corrected for intrinsic extinction 11. Error_Abs_g_intrinsic_ext_corr – Uncertainty of the extinction-corrected g value 12. Abs_r – Absolute magnitude in r band 13. Error_Abs_r – Uncertainty in Abs_r 14. Abs_r_intrinsic_ext_corr – r-band absolute magnitude corrected for intrinsic extinction 15. Error_Abs_r_intrinsic_ext_corr – Uncertainty of the extinction-corrected r value 16. Abs_i – Absolute magnitude in i band 17. Abs_i_intrinsic_ext_corr – i-band absolute magnitude corrected for intrinsic extinction 18. Error_Abs_i_intrinsic_ext_corr – Uncertainty of the extinction-corrected i value 19. Abs_z – Absolute magnitude in z band 20. Abs_z_intrinsic_ext_corr – z-band absolute magnitude corrected for intrinsic extinction 21. Error_Abs_z_intrinsic_ext_corr – Uncertainty of the extinction-corrected z value 22. Redshift – Spectroscopic redshift 23. Error_Redshift – Uncertainty in redshift The `Table_star_forming_galaxies.csv` file in the `raw/` directory contains the parent sample of galaxies, from which the blue galaxies subsamples were derived. The datasets were extracted from the Sloan Digital Sky Survey (SDSS), applying specific criteria for blue star-forming galaxies, as detailed in the paper. This repository does not contain the full SDSS catalogue, but only the subsets used in the analysis.