Pith Number

pith:WWS3ANTW

pith:2009:WWS3ANTWY2Q2FIAOIUI2V7XLLI

not attested not anchored not stored refs pending

The origin of hydrogen around HD 209458b

A. Lecavelier des Etangs, A. Vidal-Madjar, J.-M. Desert

arxiv:0902.3994 v1 · 2009-02-23 · 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{WWS3ANTWY2Q2FIAOIUI2V7XLLI}

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	2026-07-04T15:38:39.160366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b5a5b03676c6a1a2a00e4511aafeeb5a17eabc342cd1a6d822a098f67320bfcc

Aliases

arxiv: 0902.3994 · arxiv_version: 0902.3994v1 · doi: 10.48550/arxiv.0902.3994 · pith_short_12: WWS3ANTWY2Q2 · pith_short_16: WWS3ANTWY2Q2FIAO · pith_short_8: WWS3ANTW

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/WWS3ANTWY2Q2FIAOIUI2V7XLLI \
  | 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: b5a5b03676c6a1a2a00e4511aafeeb5a17eabc342cd1a6d822a098f67320bfcc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dc9178748c4b362e033a2da34a80913c0c8769524106eee2a976cc55561b044",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-02-23T21:00:06Z",
    "title_canon_sha256": "2c96db8ea7b07c0e8a0d3b8b29b6b51a36e4aa0c1e60bc9865cef5edc628b420"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3994",
    "kind": "arxiv",
    "version": 1
  }
}