Pith Number

pith:QVZPKAOI

pith:2012:QVZPKAOIOSU5MCJUE3I4NAWAD3

not attested not anchored not stored refs pending

First VLT/X-shooter spectroscopy of early-type stars outside the Local Group

Alex de Koter, Hugues Sana, Lex Kaper, Olga Hartoog

arxiv:1201.5145 v1 · 2012-01-24 · 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{QVZPKAOIOSU5MCJUE3I4NAWAD3}

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	2026-05-18T03:36:25.275408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8572f501c874a9d6093426d1c682c01edf2acb3cea8b4201a44d4714dd5b07f5

Aliases

arxiv: 1201.5145 · arxiv_version: 1201.5145v1 · doi: 10.48550/arxiv.1201.5145 · pith_short_12: QVZPKAOIOSU5 · pith_short_16: QVZPKAOIOSU5MCJU · pith_short_8: QVZPKAOI

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/QVZPKAOIOSU5MCJUE3I4NAWAD3 \
  | 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: 8572f501c874a9d6093426d1c682c01edf2acb3cea8b4201a44d4714dd5b07f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02d036fccc5635b1023f90433a112fcb4f2422eb06c5a09c9133abb8d5660a8a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-01-24T22:24:06Z",
    "title_canon_sha256": "b17fa6ec673ab3d9b7397fae439a55cb59a303021f303352eb4db15a386a8991"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5145",
    "kind": "arxiv",
    "version": 1
  }
}