Pith Number

pith:24E7AVE2

pith:2012:24E7AVE2GOWPJFU3NTNARWGYLM

not attested not anchored not stored refs pending

The Periodic Spectroscopic Variability of FU Orionis

Cathie J. Clarke, Jerome Bouvier, Mike Irwin, Stacie L. Powell

arxiv:1209.0981 v2 · 2012-09-05 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{24E7AVE2GOWPJFU3NTNARWGYLM}

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	2026-05-18T01:54:40.158269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d709f0549a33acf4969b6cda08d8d85b36b0469109282bd12cf9dd1887836bb9

Aliases

arxiv: 1209.0981 · arxiv_version: 1209.0981v2 · doi: 10.48550/arxiv.1209.0981 · pith_short_12: 24E7AVE2GOWP · pith_short_16: 24E7AVE2GOWPJFU3 · pith_short_8: 24E7AVE2

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/24E7AVE2GOWPJFU3NTNARWGYLM \
  | 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: d709f0549a33acf4969b6cda08d8d85b36b0469109282bd12cf9dd1887836bb9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b93860fb3d13c24adb4d37baaf8c6e939e48a400e7e7e7eba7ad7b82386e33d",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-09-05T13:57:59Z",
    "title_canon_sha256": "e32a128817ba5c887325fff95a046cd24e6936ee6c3faf1584ed2aa58e5a5de2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.0981",
    "kind": "arxiv",
    "version": 2
  }
}