Pith Number

pith:TF2E3MLL

pith:2013:TF2E3MLL5AETPKVXJWJLH7IJXC

not attested not anchored not stored refs pending

Detecting the rapidly expanding outer shell of the Crab Nebula: where to look

C. T. Richardson, E. D. Loh, G. J. Ferland, J. A. Baldwin, Xiang Wang

arxiv:1307.1044 v1 · 2013-07-03 · 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{TF2E3MLL5AETPKVXJWJLH7IJXC}

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	2026-05-18T01:49:00.183900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99744db16be80937aab74d92b3fd09b8a75625cc4a6ed8ee5e860fce27dec9b6

Aliases

arxiv: 1307.1044 · arxiv_version: 1307.1044v1 · doi: 10.48550/arxiv.1307.1044 · pith_short_12: TF2E3MLL5AET · pith_short_16: TF2E3MLL5AETPKVX · pith_short_8: TF2E3MLL

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/TF2E3MLL5AETPKVXJWJLH7IJXC \
  | 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: 99744db16be80937aab74d92b3fd09b8a75625cc4a6ed8ee5e860fce27dec9b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b11a70705005fff5846ea13466755da8291940437829b88cb0ed5d498dbe4e23",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-07-03T15:28:46Z",
    "title_canon_sha256": "98ee8c3aff7108768d44b1b8fe50321b9dac97a219f63e18ef8ea572a6596592"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.1044",
    "kind": "arxiv",
    "version": 1
  }
}