Pith Number

pith:XBQ6VTTG

pith:2011:XBQ6VTTGXB4RKJCXOGG2IBYCM6

not attested not anchored not stored refs pending

The Helium Abundance in the Ejecta of U Scorpii

A. Evans, B. J. M. Hassall, F. M. Walter, H. L. Worters, M. B. N. Kouwenhoven, M. F. Bode, M. J. Darnley, M. P. Maxwell, M. T. Rushton, S. P. S. Eyres

arxiv:1109.2468 v2 · 2011-09-12 · 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{XBQ6VTTGXB4RKJCXOGG2IBYCM6}

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	2026-05-18T02:00:34.474070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b861eace66b879152457718da4070267ac12e912070b90f26f7fb81554eb4d89

Aliases

arxiv: 1109.2468 · arxiv_version: 1109.2468v2 · doi: 10.48550/arxiv.1109.2468 · pith_short_12: XBQ6VTTGXB4R · pith_short_16: XBQ6VTTGXB4RKJCX · pith_short_8: XBQ6VTTG

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/XBQ6VTTGXB4RKJCXOGG2IBYCM6 \
  | 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: b861eace66b879152457718da4070267ac12e912070b90f26f7fb81554eb4d89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4cedfd47d30433110ab606b251eea76b06b5e0e6064ef0eb389129a0ff5391d8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-09-12T13:42:47Z",
    "title_canon_sha256": "bcb246a94cadfa6b6822bbf40d497a2bb6d92d7c39566f3450b131f6f4a889b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2468",
    "kind": "arxiv",
    "version": 2
  }
}