Pith Number

pith:A2FU3SCR

pith:2013:A2FU3SCRRZG7SO3CV6SC7NTOPW

not attested not anchored not stored refs pending

Fermi LAT and WMAP observations of the supernova remnant HB 21

D.A. Smith, F. Acero, F. de Palma, F. Giordano, G.H. Janssen, G. Johannesson, G. Pivato, J. Ballet, J. Hewitt, L. Tibaldo, T.J. Brandt

arxiv:1311.0393 v1 · 2013-11-02 · 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{A2FU3SCRRZG7SO3CV6SC7NTOPW}

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	2026-05-18T01:46:39.701104Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

068b4dc8518e4df93b62afa42fb66e7dbcbf3bf63c11227ccd9ef5d8bd0dcf29

Aliases

arxiv: 1311.0393 · arxiv_version: 1311.0393v1 · doi: 10.48550/arxiv.1311.0393 · pith_short_12: A2FU3SCRRZG7 · pith_short_16: A2FU3SCRRZG7SO3C · pith_short_8: A2FU3SCR

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/A2FU3SCRRZG7SO3CV6SC7NTOPW \
  | 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: 068b4dc8518e4df93b62afa42fb66e7dbcbf3bf63c11227ccd9ef5d8bd0dcf29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f8844a7cb1535d2630eb35236beba6158d3da5ec8d5ec01eab6592dc921371c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-11-02T17:02:58Z",
    "title_canon_sha256": "5f4d42dab0215768e867df3b6a3b30b6e8ae345a44ff4564cdcf4568480cfb53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.0393",
    "kind": "arxiv",
    "version": 1
  }
}