juliensimon/grbweb-unified-grb-catalog

GRBweb Unified Multi-Instrument GRB Catalog

Part of the Astronomy Datasets collection on Hugging Face.

Unified catalog of 9,058 gamma-ray bursts detected across multiple space missions, sourced from the GRBweb database maintained by the IceCube Collaboration. Combines data from Fermi GBM, Swift BAT, BATSE, BeppoSAX, IPN, and other instruments into a single deduplicated catalog.

Dataset description

Gamma-ray bursts (GRBs) are the most energetic explosions in the universe. Different space missions have detected GRBs since the early 1990s, but each instrument covers different energy ranges, sky regions, and time periods. GRBweb unifies detections across all major GRB instruments, providing a single cross-referenced catalog with consistent columns for position, duration, fluence, and redshift.

Currently 9,058 GRBs (1,348 short, 6,548 long), of which 741 have measured redshifts. Date range: 1991-04-21 to 2026-03-26.

Schema

Column	Type	Description
grb_name	string	Canonical GRB name (e.g. "GRB260326A")
grb_name_fermi	string	Fermi GBM trigger name (null if not detected by Fermi)
t0_utc	string	Trigger time (UTC, HH:MM:SS.sss)
ra	float	Right ascension (degrees, J2000)
dec	float	Declination (degrees, J2000)
pos_error	float	Position uncertainty (degrees, 1-sigma)
t90	float	T90 duration (s) — time containing 90% of fluence
t90_error	float	T90 uncertainty (s)
t90_start	string	T90 interval start time (UTC)
fluence	float	Total fluence (erg/cm^2)
fluence_error	float	Fluence uncertainty (erg/cm^2)
redshift	float	Spectroscopic or photometric redshift
t100	float	T100 duration (s) — total burst duration
gbm_located	bool	Whether Fermi GBM provided the localization
mjd	float	Modified Julian Date of trigger
trigger_time	datetime	Trigger time as datetime (derived from MJD)
duration_class	string	"short" (T90 < 2 s) or "long" (T90 >= 2 s)

Quick stats

• 9,058 gamma-ray bursts from multiple instruments
• 1,348 short GRBs, 6,548 long GRBs
• 741 with measured redshift
• 3,102 with Fermi GBM localization
• Date range: 1991-04-21 to 2026-03-26
• Brightest burst: GRB221009A (fluence 3.88e-02 erg/cm^2)

Usage

from datasets import load_dataset

ds = load_dataset("juliensimon/grbweb-unified-grb-catalog", split="train")
df = ds.to_pandas()

# Short vs long GRBs
short = df[df["duration_class"] == "short"]
long = df[df["duration_class"] == "long"]
print(f"{len(short):,} short, {len(long):,} long GRBs")

# GRBs with measured redshift
z_known = df[df["redshift"].notna()]
print(f"{len(z_known):,} GRBs with redshift (z_max={z_known['redshift'].max():.2f})")

# T90 distribution
import matplotlib.pyplot as plt
df["t90"].dropna().apply(lambda x: max(x, 1e-3)).hist(bins=50, log=True)
plt.xlabel("T90 (s)")
plt.title("GRB Duration Distribution (GRBweb)")

Data source

GRBweb — unified GRB database maintained by the IceCube Collaboration at the University of Wisconsin-Madison. Combines detections from Fermi GBM, Swift BAT, CGRO/BATSE, BeppoSAX, INTEGRAL, IPN, and other missions.

Update schedule

Static dataset, rebuilt monthly. Source code: juliensimon/space-datasets.

Related datasets

• gamma-ray-bursts — Fermi GBM Burst Catalog
• fermi-4fgl — Fermi LAT 4FGL Source Catalog
• near-earth-objects — NEO close approaches

Citation

@dataset{grbweb_unified,
  author = {Simon, Julien},
  title = {GRBweb Unified Multi-Instrument GRB Catalog},
  year = {2026},
  publisher = {Hugging Face},
  url = {https://huggingface.co/datasets/juliensimon/grbweb-unified-grb-catalog},
  note = {Based on GRBweb data from IceCube/University of Wisconsin-Madison}
}

License

CC-BY-4.0