pith:3N63TY55
Fermi Large Area Telescope Fourth Source Catalog Data Release 4 (4FGL-DR4)
The Fermi-LAT fourth catalog now lists 7194 gamma-ray sources from the first 14 years of observations.
arxiv:2307.12546 v4 · 2023-07-24 · astro-ph.HE
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We present an incremental version (4FGL-DR4) of the fourth Fermi-LAT catalog containing 7194 gamma-ray sources. Based on the first 14 years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL-DR3 catalog did for 12 years of data, with only a few improvements.
The assumption that the same analysis pipeline and background models used for 12 years remain adequate for 14 years without introducing new systematic errors in source detection, localization, or spectral fitting near threshold.
The 4FGL-DR4 catalog updates the prior release with 14 years of Fermi-LAT observations, adding 546 new point sources and revising parameters, associations, and light curves for a total of 7194 gamma-ray sources.
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| First computed | 2026-05-17T23:38:46.912588Z |
|---|---|
| Builder | pith-number-builder-2026-05-17-v1 |
| Signature | Pith Ed25519
(pith-v1-2026-05) · public key |
| Schema | pith-number/v1.0 |
Canonical hash
db7db9e3bd7a53a2134046b1824b8ad85505c5e04345134d87ec76ca0fe6f57a
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Verify this Pith Number yourself
curl -sH 'Accept: application/ld+json' https://pith.science/pith/3N63TY55PJJ2EE2AI2YYES4K3B \
| jq -c '.canonical_record' \
| python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: db7db9e3bd7a53a2134046b1824b8ad85505c5e04345134d87ec76ca0fe6f57a
Canonical record JSON
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