Pith Number

pith:553IJLFQ

pith:2011:553IJLFQWFVEJDPVEJESTQRSDN

not attested not anchored not stored refs pending

How neutral is the intergalactic medium surrounding the redshift z=7.085 quasar ULAS J1120+0641?

(2) KICC/IoA Cambridge, (3) Imperial, (4) ESO, (5) Liverpool John Moores), Bram P. Venemans (4), Chris Simpson (5) ((1) Melbourne, Daniel J. Mortlock (3), James S. Bolton (1), Martin G. Haehnelt (2), Paul C. Hewett (2), Richard G. McMahon (2), Stephen J. Warren (3)

arxiv:1106.6089 v1 · 2011-06-30 · 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{553IJLFQWFVEJDPVEJESTQRSDN}

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	2026-05-18T02:01:26.725531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef7684acb0b16a448df5224929c2321b5eedb6148b9c0522082b154f71e95eb6

Aliases

arxiv: 1106.6089 · arxiv_version: 1106.6089v1 · doi: 10.48550/arxiv.1106.6089 · pith_short_12: 553IJLFQWFVE · pith_short_16: 553IJLFQWFVEJDPV · pith_short_8: 553IJLFQ

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/553IJLFQWFVEJDPVEJESTQRSDN \
  | 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: ef7684acb0b16a448df5224929c2321b5eedb6148b9c0522082b154f71e95eb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7811b6196cf50beec833891fe18aa048ff3f60bd1b6f2586ef97bc5b746d87eb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-30T00:16:46Z",
    "title_canon_sha256": "f35045fbf96a719c9e6120d9f02aa00569704b91fea55267d7f51091f9876e9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.6089",
    "kind": "arxiv",
    "version": 1
  }
}