Pith Number

pith:KVLQX7J7

pith:2011:KVLQX7J7FJQOU3TMBAHDDH7ZMG

not attested not anchored not stored refs pending

A Gunn-Peterson test with a QSO at z=6.4

Chisato Yamauchi (ISAS/Jaxa), Satoshi Miyazaki (NAOJ), Takashi Hattori (Subaru), Tomotsugu Goto (ifa, University of Hawaii/Subaru telescope), Yousuke Utsumi (GUAS/NAOJ)

arxiv:1104.1636 v1 · 2011-04-08 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KVLQX7J7FJQOU3TMBAHDDH7ZMG}

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	2026-05-18T02:02:36.129625Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55570bfd3f2a60ea6e6c080e319ff96183c727fa353f3c7e41d965388184d913

Aliases

arxiv: 1104.1636 · arxiv_version: 1104.1636v1 · doi: 10.48550/arxiv.1104.1636 · pith_short_12: KVLQX7J7FJQO · pith_short_16: KVLQX7J7FJQOU3TM · pith_short_8: KVLQX7J7

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/KVLQX7J7FJQOU3TMBAHDDH7ZMG \
  | 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: 55570bfd3f2a60ea6e6c080e319ff96183c727fa353f3c7e41d965388184d913

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83b4f94833fd0848a925021099d624ecad9086babd7b9c7ba6df5b47dfe260cb",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-08T20:00:03Z",
    "title_canon_sha256": "7eaa79f9d616f7bf3a15b8ae85b157be7958e634196e66182bbf7401baa548d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1636",
    "kind": "arxiv",
    "version": 1
  }
}