juliensimon/fuse-observations

---
license: cc-by-4.0
pretty_name: "FUSE Observation Catalog"
language:
- en
description: "The FUSE Observation Catalog indexes every observation obtained by NASA's Far Ultraviolet Spectroscopic Explorer (FUSE), which operated from June 24, 1999 to October 18, 2007. FUSE was uniquely design"
task_categories:
- tabular-classification
tags:
- space
- fuse
- nasa
- ultraviolet
- far-uv
- spectroscopy
- astronomy
- telescope
- open-data
- tabular-data
- parquet
size_categories:
- 1K<n<10K
configs:
- config_name: default
data_files:
- split: train
path: data/fuse_observations.parquet
default: true
---

# FUSE Observation Catalog

<div align="center">
<img src="banner.jpg" alt="Representative view of the UV sky — FUSE covered the 905–1187 Å band uniquely" width="400">
<p><em>Credit: NASA/GSFC</em></p>
</div>

*Part of a [dataset collection](https://huggingface.co/collections/juliensimon/astronomy-datasets-69c24caf2f17e36128946743) on Hugging Face.*

## Dataset description

The FUSE Observation Catalog indexes every observation obtained by NASA's Far Ultraviolet Spectroscopic Explorer (FUSE), which operated from June 24, 1999 to October 18, 2007. FUSE was uniquely designed to observe the hard-to-reach far-UV band between 905 and 1187 Å, where critical absorption lines from H₂, O VI, and deuterium fall — wavelengths inaccessible to Hubble's instruments. Its four coaligned Rowland-circle spectrographs delivered resolving power R ≈ 20,000, the highest ever achieved in space at these wavelengths.

Each row is one FUSE pointing. The archive totals roughly 5,700 observations — modest in count but extraordinarily high-value because of the unique wavelength coverage. FUSE targets include hot white dwarfs (temperature probes via Lyman series), the diffuse interstellar medium (mapping H₂ and O VI in the Milky Way halo), extragalactic quasars (probing the intergalactic medium via absorption), and early-type stars (stellar winds and mass-loss rates).

This dataset is designed for cross-matching with other UV catalogs (IUE, HST, GALEX), identifying FUSE coverage of any sightline of interest, and as a lookup table for retrieving individual spectra from MAST. It complements the HST, IUE, GALEX, JWST, and Chandra observation catalogs in this collection — FUSE fills the 905–1187 Å band that no other mission in that set covers.

The catalog is derived from MAST's CAOM table `dbo.caomobservation` (collection = 'FUSE'). The archive is static since 2007, so this dataset refreshes quarterly for any late reprocessing or metadata fixes.

This dataset is suitable for **tabular classification** tasks.

## Schema

| Column | Type | Description | Sample | Null % |
|--------|------|-------------|--------|--------|
| `obs_id` | string | FUSE observation identifier (11-char alphanumeric, e.g., 'a0010101000'). Primary key. | a0010101000 | 0.0% |
| `obstype` | string | CAOM observation type: 'S' (simple) or 'C' (composite) | S | 0.0% |
| `intent` | string | Observation intent: 'science' or 'calibration' | science | 0.0% |
| `proposal_id` | string | FUSE proposal identifier (e.g., 'A001', 'B234'); cycle-letter + sequence | A001 | 11.7% |
| `proposal_pi` | string | Principal Investigator name (free-form) | Werner | 11.7% |
| `target_name` | string | Target name as provided by the proposer | HE0504-2408 | 0.0% |
| `target_ra` | float64 | Target right ascension in decimal degrees (ICRS) | 76.57566700000001 | 0.0% |
| `target_dec` | float64 | Target declination in decimal degrees (ICRS) | -24.067194 | 0.0% |

## Quick stats

- **5,729** FUSE far-UV spectra (1999–2007)
- **2,807** distinct target names
- **238** distinct Principal Investigators
- Unique wavelength coverage: **905–1187 Å** (H₂, O VI, deuterium lines)

## Usage

```python
from datasets import load_dataset

ds = load_dataset("juliensimon/fuse-observations", split="train")
df = ds.to_pandas()
```

```python
from datasets import load_dataset

ds = load_dataset("juliensimon/fuse-observations", split="train")
df = ds.to_pandas()

# Top-observed targets
top = df["target_name"].value_counts().head(20)
print(top)

# Sky distribution
import matplotlib.pyplot as plt
plt.figure(figsize=(12, 6))
plt.scatter(df["target_ra"], df["target_dec"], s=1, alpha=0.5)
plt.xlabel("RA (deg)"); plt.ylabel("Dec (deg)")
plt.gca().invert_xaxis()
plt.title("FUSE target pointings (1999–2007)")
plt.show()
```

## Data source

https://archive.stsci.edu/missions-and-data/fuse

## Update schedule

Quarterly (1st of Jan/Apr/Jul/Oct at 16:00 UTC) via [GitHub Actions](https://github.com/juliensimon/space-datasets).

## Related datasets

- [juliensimon/iue-observations](https://huggingface.co/datasets/juliensimon/iue-observations)

- [juliensimon/hst-observations](https://huggingface.co/datasets/juliensimon/hst-observations)

- [juliensimon/galex-observations](https://huggingface.co/datasets/juliensimon/galex-observations)

- [juliensimon/euve-observations](https://huggingface.co/datasets/juliensimon/euve-observations)

- [juliensimon/quasar-catalog](https://huggingface.co/datasets/juliensimon/quasar-catalog)

> If you find this dataset useful, please consider [giving it a like](https://huggingface.co/datasets/juliensimon/fuse-observations) on Hugging Face. It helps others discover it.

## About the author

Created by [Julien Simon](https://julien.org) — AI Operating Partner at Fortino Capital. Part of the [Space Datasets](https://julien.org/datasets) collection.

## Citation

```bibtex
@dataset{fuse_observations,
title = {FUSE Observation Catalog},
author = {juliensimon},
year = {2026},
url = {https://huggingface.co/datasets/juliensimon/fuse-observations},
publisher = {Hugging Face}
}
```

## License

[CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/)

许可协议：知识共享署名4.0许可（CC-BY-4.0）
美观名称："FUSE观测目录"
语言：英语
任务类别：表格分类
标签：航天、FUSE、NASA、紫外、远紫外、光谱学、天文学、望远镜、开放数据、表格数据、Parquet格式
数据规模：1000~10000条
配置项：
- 默认配置：训练拆分对应数据文件为data/fuse_observations.parquet，为默认启用配置

# FUSE观测目录

<div align="center">
<img src="banner.jpg" alt="紫外天区代表性视图 — FUSE独特覆盖905–1187 Å波段" width="400">
<p><em>图源：NASA/戈达德航天飞行中心</em></p>
</div>

本数据集属于Hugging Face平台上的[天文数据集合集](https://huggingface.co/collections/juliensimon/astronomy-datasets-69c24caf2f17e36128946743)。

## 数据集描述

FUSE观测目录收录了美国国家航空航天局（NASA）的远紫外分光探测器（Far Ultraviolet Spectroscopic Explorer，简称FUSE）的全部观测数据，该探测器运行于1999年6月24日至2007年10月18日。FUSE专为观测难以企及的905–1187 Å远紫外波段设计，该波段存在氢分子（H₂）、氧六重态离子（O VI）以及氘的关键吸收线——这些波长是哈勃空间望远镜仪器无法覆盖的。其搭载的四台共线罗兰圆摄谱仪实现了约20000的分辨本领R，在该波长段的太空观测中达到了当时最高水平。

每一行数据对应一次FUSE观测指向。该档案总计约5700次观测，数量不多但价值极高，因其独特的波长覆盖范围。FUSE的观测目标包括热白矮星（通过莱曼系探测恒星温度）、弥散星际介质（绘制银河系晕中的氢分子与氧六重态离子分布）、河外类星体（通过吸收线探测星系际介质）以及早型星（研究星风与质量损失率）。

本数据集可用于与其他紫外星表（IUE、HST、GALEX）交叉匹配，识别任意感兴趣视线的FUSE覆盖范围，亦可作为从太空望远镜科学研究所多任务档案馆（MAST）检索单个光谱的查找表。它补充了本合集内的HST、IUE、GALEX、詹姆斯·韦布空间望远镜（JWST）和钱德拉X射线天文台观测目录——FUSE填补了该合集中其他任务均未覆盖的905–1187 Å波段。

该目录源自MAST的通用天文输出模型（CAOM）表`dbo.caomobservation`（collection = 'FUSE'）。该档案自2007年起处于静态，因此本数据集每季度更新一次，以纳入后期重新处理或元数据修正内容。

本数据集适用于**表格分类**任务。

## 数据模式

| 列名 | 数据类型 | 描述 | 示例 | 空值占比 |
|--------|------|-------------|--------|--------|
| `obs_id` | 字符串 | FUSE观测标识符（11位字母数字组合，例如'a0010101000'），为主键 | a0010101000 | 0.0% |
| `obstype` | 字符串 | CAOM观测类型：'S'代表简单观测，'C'代表复合观测 | S | 0.0% |
| `intent` | 字符串 | 观测意图：'science'代表科学观测，'calibration'代表定标观测 | science | 0.0% |
| `proposal_id` | 字符串 | FUSE提案标识符（例如'A001'、'B234'），格式为周期字母+序列编号 | A001 | 11.7% |
| `proposal_pi` | 字符串 | 首席研究员姓名（自由格式字段） | Werner | 11.7% |
| `target_name` | 字符串 | 提案者提供的目标名称 | HE0504-2408 | 0.0% |
| `target_ra` | float64 | 目标赤经，单位为十进制度（国际天球参考系，ICRS） | 76.57566700000001 | 0.0% |
| `target_dec` | float64 | 目标赤纬，单位为十进制度（国际天球参考系，ICRS） | -24.067194 | 0.0% |

## 快速统计

- **5729**次FUSE远紫外光谱观测（1999–2007）
- **2807**个不同目标名称
- **238**位不同首席研究员
- 独特波长覆盖范围：**905–1187 Å**（覆盖氢分子、氧六重态离子与氘吸收线）

## 使用方法

python
from datasets import load_dataset

ds = load_dataset("juliensimon/fuse-observations", split="train")
df = ds.to_pandas()

python
from datasets import load_dataset

ds = load_dataset("juliensimon/fuse-observations", split="train")
df = ds.to_pandas()

# 统计观测次数最多的前20个目标
top = df["target_name"].value_counts().head(20)
print(top)

# 绘制天区分布
import matplotlib.pyplot as plt
plt.figure(figsize=(12, 6))
plt.scatter(df["target_ra"], df["target_dec"], s=1, alpha=0.5)
plt.xlabel("赤经（度）"); plt.ylabel("赤纬（度）")
plt.gca().invert_xaxis()
plt.title("FUSE观测指向分布（1999–2007）")
plt.show()

## 数据来源

https://archive.stsci.edu/missions-and-data/fuse

## 更新计划

每季度（1月、4月、7月、10月的16:00 UTC）通过[GitHub Actions](https://github.com/juliensimon/space-datasets)更新。

## 相关数据集

- [juliensimon/iue-observations](https://huggingface.co/datasets/juliensimon/iue-observations)
- [juliensimon/hst-observations](https://huggingface.co/datasets/juliensimon/hst-observations)
- [juliensimon/galex-observations](https://huggingface.co/datasets/juliensimon/galex-observations)
- [juliensimon/euve-observations](https://huggingface.co/datasets/juliensimon/euve-observations)
- [juliensimon/quasar-catalog](https://huggingface.co/datasets/juliensimon/quasar-catalog)

> 如果您觉得本数据集有用，请考虑在Hugging Face上[为其点赞](https://huggingface.co/datasets/juliensimon/fuse-observations)，这有助于更多用户发现该数据集。

## 关于作者

本数据集由[Julien Simon](https://julien.org)创建——Fortino Capital的AI运营合伙人，属于[Space Datasets](https://julien.org/datasets)合集。

## 引用格式

bibtex
@dataset{fuse_observations,
title = {FUSE Observation Catalog},
author = {juliensimon},
year = {2026},
url = {https://huggingface.co/datasets/juliensimon/fuse-observations},
publisher = {Hugging Face}
}

## 许可协议

[知识共享署名4.0许可（CC-BY-4.0）](https://creativecommons.org/licenses/by/4.0/)