Pith Number

pith:W6GFA2UU

pith:2019:W6GFA2UUUTBILLCDT57K4JSPXO

not attested not anchored not stored refs pending

The dust content of the Crab Nebula

A. Bevan, F. Priestley, H. Chawner, H.L. Gomez, I. De Looze, M.F. Bietenholz, M.J. Barlow, M. Matsuura, R. Bandiera, R. Wesson

arxiv:1906.02203 v1 · 2019-06-05 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W6GFA2UUUTBILLCDT57K4JSPXO}

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	2026-05-17T23:43:33.977755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b78c506a94a4c285ac439f7eae264fbbadb4835711a0d5a0a6c40d5d8d0b9725

Aliases

arxiv: 1906.02203 · arxiv_version: 1906.02203v1 · doi: 10.48550/arxiv.1906.02203 · pith_short_12: W6GFA2UUUTBI · pith_short_16: W6GFA2UUUTBILLCD · pith_short_8: W6GFA2UU

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/W6GFA2UUUTBILLCDT57K4JSPXO \
  | 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: b78c506a94a4c285ac439f7eae264fbbadb4835711a0d5a0a6c40d5d8d0b9725

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2bbd5953e7dd68700e4f1a464be37f7f1c36ece500cde11808a832e5a4bb7c81",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-06-05T18:00:01Z",
    "title_canon_sha256": "db2bb170181b5c23a99b073792d67188dc31f5ce52db67fb2c46c63c2aa28634"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.02203",
    "kind": "arxiv",
    "version": 1
  }
}