Pith Number

pith:QYBOGRPN

pith:2009:QYBOGRPNRROCCHHLTFIK7OMEVK

not attested not anchored not stored refs pending

Constraining reionization using 21 cm observations in combination with CMB and Lyman-alpha forest data

Abraham Loeb (CfA), Jonathan R. Pritchard (CfA), J. Stuart B. Wyithe (Melbourne)

arxiv:0908.3891 v1 · 2009-08-26 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QYBOGRPNRROCCHHLTFIK7OMEVK}

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	2026-05-18T02:12:22.526891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8602e345ed8c5c211ceb9950afb984aa8421f60064a44cff2f8f951daebf5f5e

Aliases

arxiv: 0908.3891 · arxiv_version: 0908.3891v1 · doi: 10.48550/arxiv.0908.3891 · pith_short_12: QYBOGRPNRROC · pith_short_16: QYBOGRPNRROCCHHL · pith_short_8: QYBOGRPN

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/QYBOGRPNRROCCHHLTFIK7OMEVK \
  | 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: 8602e345ed8c5c211ceb9950afb984aa8421f60064a44cff2f8f951daebf5f5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffd38445f59a865a36e7e524d95481e68a9caa4dbb6cffc858a6e2d4fe9f0282",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-26T20:00:06Z",
    "title_canon_sha256": "1ced69974073dc1009b78d5c55efdb1c9ce177e02750a630d996c54cbd4adea5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3891",
    "kind": "arxiv",
    "version": 1
  }
}