Pith Number

pith:PBIRUX4Y

pith:2010:PBIRUX4YMZITGDHXO3BXTECQ4A

not attested not anchored not stored refs pending

Hubble/COS Observations of the Quasar HE 2347-4342: Probing the Epoch of He II Patchy Reionization at Redshifts z = 2.4-2.9

Britton Smith, Charles Danforth, Jason Tumlinson, Kevin France, Michael Shull

arxiv:1008.2957 v1 · 2010-08-17 · 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{PBIRUX4YMZITGDHXO3BXTECQ4A}

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	2026-05-18T04:42:03.794099Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78511a5f986651330cf776c3799050e01a664f3b4f123d2bec3cef7022977b9e

Aliases

arxiv: 1008.2957 · arxiv_version: 1008.2957v1 · doi: 10.48550/arxiv.1008.2957 · pith_short_12: PBIRUX4YMZIT · pith_short_16: PBIRUX4YMZITGDHX · pith_short_8: PBIRUX4Y

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/PBIRUX4YMZITGDHXO3BXTECQ4A \
  | 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: 78511a5f986651330cf776c3799050e01a664f3b4f123d2bec3cef7022977b9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b2c29155d0ec5fbbc72711b800454cf55e44e45bbad0618b492774de95e6e19",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-08-17T20:00:01Z",
    "title_canon_sha256": "f6d2ecc9cbb3c2bf598f650e01294834dd041853c97f5876d57e2e0cf743b0bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.2957",
    "kind": "arxiv",
    "version": 1
  }
}