Pith Number

pith:EGF2R2DK

pith:2009:EGF2R2DKEXVST3GRIU4TG2SQ67

not attested not anchored not stored refs pending

Source detection using a 3D sparse representation: application to the Fermi gamma-ray space telescope

B. Zhang, J. Chiang, J.-L. Starck, J.M. Fadili, S. Digel

arxiv:0904.3299 v1 · 2009-04-21 · astro-ph.IM · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EGF2R2DKEXVST3GRIU4TG2SQ67}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:13:58.429778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

218ba8e86a25eb29ecd14539336a50f7c312402dc82a9d2d4623c4a9ce956075

Aliases

arxiv: 0904.3299 · arxiv_version: 0904.3299v1 · doi: 10.48550/arxiv.0904.3299 · pith_short_12: EGF2R2DKEXVS · pith_short_16: EGF2R2DKEXVST3GR · pith_short_8: EGF2R2DK

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EGF2R2DKEXVST3GRIU4TG2SQ67 \
  | 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: 218ba8e86a25eb29ecd14539336a50f7c312402dc82a9d2d4623c4a9ce956075

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "239bd89cb70c2eb062c8ba1a423be6a94499b245b7a8bd766cf85616e150e5ca",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-04-21T17:27:39Z",
    "title_canon_sha256": "e15cca8683443ca82735f54745c714c6bb6b3edaa21f46f4f288af8ca2592812"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3299",
    "kind": "arxiv",
    "version": 1
  }
}