Photometric Galaxy Redshift Prediction

Sloan Digital Sky Survey (SDSS) Galaxy Redshift Dataset

This dataset comprises a curated collection of galaxy observations from the Sloan Digital Sky Survey (SDSS). It features photometric and spectroscopic data for 100 galaxies, specifically selected to cover a range of redshifts from 0 to 0.4. The dataset includes the following key parameters for each galaxy:

Photometric Data: Magnitudes in the SDSS 'u', 'g', 'r', 'i', and 'z' bands.

Spectroscopic Data: Measured redshift (redshift) and its error (redshift_error).

Additional Metadata:

objid: Unique identifier for the photometric object.

specObjID: Unique identifier for the spectroscopic object.

ra: Right ascension in decimal degrees.

dec: Declination in decimal degrees.

class: Classification of the object, all marked as 'GALAXY'.

Purpose and Use

This dataset is intended for use in astronomical research and education, particularly in studies involving galaxy properties and distribution, cosmology, and machine learning applications such as redshift prediction models. The data is well-suited for developing and testing predictive models that estimate redshifts from photometric data, aiding in the expansion of accessible astronomical analysis tools.

Data Collection Method

The data was extracted using SQL queries against the public SDSS DR16 database, ensuring accuracy and relevance in current astronomical research contexts.

Accessibility

The dataset is made available under a CC0 license to promote open scientific research and collaboration within the astronomical community and beyond.

斯隆数字巡天（Sloan Digital Sky Survey, SDSS）星系红移数据集

本数据集收录了斯隆数字巡天（SDSS）的精选星系观测集合，包含100个星系的测光与光谱学数据，所有样本均被特意选取以覆盖0至0.4的红移范围。

本数据集为每个星系提供以下关键参数：

测光数据：斯隆数字巡天u、g、r、i、z波段的星等。

光谱学数据：实测红移值（redshift）及其误差（redshift_error）。

附加元数据：
objid：测光天体的唯一标识符
specObjID：光谱天体的唯一标识符
ra：以十进制度数表示的赤经（Right ascension）
dec：以十进制度数表示的赤纬（Declination）
class：天体分类，所有条目均标记为"GALAXY"

用途与应用
本数据集旨在服务于天文研究与教育工作，尤其适用于星系属性与分布、宇宙学相关研究，以及红移预测模型等机器学习应用场景。该数据集非常适合开发和测试基于测光数据估算红移的预测模型，有助于拓展可及的天文分析工具。

数据采集方式
本数据集通过SQL查询从公开的SDSS DR16数据库中提取，确保了数据在当前天文研究语境下的准确性与相关性。

可获取性
本数据集采用CC0协议发布，以推动天文界乃至全球范围内的开放科学研究与合作。