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.本仓库包含下述论文所使用的数据集： Franco, Camila; Avila, Felipe; Bernui, Armando (2025)，《利用两点函数与功率谱探测大尺度结构：宇宙成团演化的启示》 ### 仓库结构 本数据集分为两个核心目录： 1. `raw/`：仅包含文件 `Table_star_forming_galaxies.csv` 2. `processed/`：内含本分析所用的蓝星系子集，其目录层级如下： - 每个子目录（`a1/`、`a2/`……`a12/`）对应一个独立天区 - 每个天区包含两个数据文件，分别对应两个红移区间： - `z_0.00-0.06`（区间1） - `z_0.06-0.12`（区间2） 具体目录结构如下： `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 ### 文件格式与字段说明 本数据集各文件包含以下按顺序排列的字段： 1. `Id_SDSS_spec_DR8`：斯隆数字巡天DR8光谱标识符（Sloan Digital Sky Survey Data Release 8, SDSS DR8） 2. `RA`：赤经（Right Ascension, RA），单位为度 3. `DEC`：赤纬（Declination, DEC），单位为度 4. `Abs_u`：u波段绝对星等 5. `Error_Abs_u`：u波段绝对星等的测量不确定度 6. `Abs_u_intrinsic_ext_corr`：经过本征消光校正的u波段绝对星等 7. `Error_Abs_u_intrinsic_ext_corr`：消光校正后u波段星等的不确定度 8. `Abs_g`：g波段绝对星等 9. `Error_Abs_g`：g波段绝对星等的测量不确定度 10. `Abs_g_intrinsic_ext_corr`：经过本征消光校正的g波段绝对星等 11. `Error_Abs_g_intrinsic_ext_corr`：消光校正后g波段星等的不确定度 12. `Abs_r`：r波段绝对星等 13. `Error_Abs_r`：r波段绝对星等的测量不确定度 14. `Abs_r_intrinsic_ext_corr`：经过本征消光校正的r波段绝对星等 15. `Error_Abs_r_intrinsic_ext_corr`：消光校正后r波段星等的不确定度 16. `Abs_i`：i波段绝对星等 17. `Abs_i_intrinsic_ext_corr`：经过本征消光校正的i波段绝对星等 18. `Error_Abs_i_intrinsic_ext_corr`：消光校正后i波段星等的不确定度 19. `Abs_z`：z波段绝对星等 20. `Abs_z_intrinsic_ext_corr`：经过本征消光校正的z波段绝对星等 21. `Error_Abs_z_intrinsic_ext_corr`：消光校正后z波段星等的不确定度 22. `Redshift`：光谱红移 23. `Error_Redshift`：红移的测量不确定度 `raw/` 目录下的 `Table_star_forming_galaxies.csv` 文件包含星系母样本，本分析所用的蓝星系子集均从该母样本中抽取得到。 本数据集源自斯隆数字巡天（Sloan Digital Sky Survey, SDSS），并按照论文中详述的蓝恒星形成星系筛选标准进行了提取。本仓库未包含完整的SDSS星表，仅收录了本分析所用的子集数据。