Pith Number

pith:GHKXG5GY

pith:2013:GHKXG5GYINACZ4ZVY4DKKG5APR

not attested not anchored not stored refs pending

Direct Ultraviolet Imaging and Spectroscopy of Betelgeuse

A. K. Dupree, R. P. Stefanik

arxiv:1304.2780 v1 · 2013-04-09 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GHKXG5GYINACZ4ZVY4DKKG5APR}

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	2026-05-18T01:50:40.787235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31d57374d843402cf335c706a51ba07c6ec2fa8d5ea4bc595fbc159166117027

Aliases

arxiv: 1304.2780 · arxiv_version: 1304.2780v1 · doi: 10.48550/arxiv.1304.2780 · pith_short_12: GHKXG5GYINAC · pith_short_16: GHKXG5GYINACZ4ZV · pith_short_8: GHKXG5GY

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/GHKXG5GYINACZ4ZVY4DKKG5APR \
  | 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: 31d57374d843402cf335c706a51ba07c6ec2fa8d5ea4bc595fbc159166117027

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4731772d5dec1f4e2fac72748b6d04878d69ffc271a53e4e6a3991d0a992d73e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-04-09T20:01:08Z",
    "title_canon_sha256": "2b34b0cd8e23a33ec10e7e58b1ac805f373c753eacfd438d461f75a4955b209e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2780",
    "kind": "arxiv",
    "version": 1
  }
}