Pith Number

pith:MQUM5BJP

pith:2021:MQUM5BJPXCHFFSFBHPVQHW7HX5

not attested not anchored not stored refs pending

Extragalactic magnetic field constraints from ultra-high-energy cosmic rays from local galaxies

Andrea Palladino, Andrew Taylor, Arjen van Vliet, Walter Winter

arxiv:2104.05732 v2 · 2021-04-12 · 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{MQUM5BJPXCHFFSFBHPVQHW7HX5}

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	2026-07-05T03:37:42.186298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6428ce852fb88e52c8a13beb03dbe7bf690aca2979752315908533fb5da009c5

Aliases

arxiv: 2104.05732 · arxiv_version: 2104.05732v2 · doi: 10.48550/arxiv.2104.05732 · pith_short_12: MQUM5BJPXCHF · pith_short_16: MQUM5BJPXCHFFSFB · pith_short_8: MQUM5BJP

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/MQUM5BJPXCHFFSFBHPVQHW7HX5 \
  | 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: 6428ce852fb88e52c8a13beb03dbe7bf690aca2979752315908533fb5da009c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63ab8635cf5516792ea391a6cdc423846b4692e3e886e49dc7726316521c2fe4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-04-12T18:00:11Z",
    "title_canon_sha256": "ae936cd8db3381e40a5c72439f6910492807ca89292eb87500a418cdb28e5b99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.05732",
    "kind": "arxiv",
    "version": 2
  }
}