Pith Number

pith:ZS7XCE33

pith:2009:ZS7XCE33FREVHAG5GBRWUTK5IW

not attested not anchored not stored refs pending

Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022

E. Angelakis, et al., F. Tavecchio, G. Ghisellini, L. Maraschi, The Fermi/LAT Collaboration: A.A. Abdo

arxiv:0905.4558 v1 · 2009-05-28 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZS7XCE33FREVHAG5GBRWUTK5IW}

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	2026-05-18T03:48:02.565961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccbf71137b2c495380dd30636a4d5d45a91931da3659db0c9192aa4dfd057593

Aliases

arxiv: 0905.4558 · arxiv_version: 0905.4558v1 · doi: 10.48550/arxiv.0905.4558 · pith_short_12: ZS7XCE33FREV · pith_short_16: ZS7XCE33FREVHAG5 · pith_short_8: ZS7XCE33

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/ZS7XCE33FREVHAG5GBRWUTK5IW \
  | 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: ccbf71137b2c495380dd30636a4d5d45a91931da3659db0c9192aa4dfd057593

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fe917c6768c5e04592ab430fdef075f6c631cde30643083745996e1f8e809f1",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-05-28T06:19:43Z",
    "title_canon_sha256": "03f6149db7f09df90ac1af7668f4856ecdea6a0e8598090334a03146306a1751"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4558",
    "kind": "arxiv",
    "version": 1
  }
}