Pith Number

pith:274NUPEX

pith:2011:274NUPEXML66ALOJOLFIAEZ5T3

not attested not anchored not stored refs pending

A galaxy as the source of a Civ absorption system close to the epoch of reionization

3), C. Gonzalo Diaz (1), Emma V. Ryan-Weber (1), Jeff Cooke (1), Max Pettini (2, Piero Madau (4). ((1) Centre for Astrophysics & Supercomputing, Swinburne University of Technology (2) Institute of Astronomy, University of California), University of Cambridge (3) Kavli Institute for Cosmology, University of Cambridge (4) Department of Astronomy & Astrophysics

arxiv:1104.4194 v2 · 2011-04-21 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{274NUPEXML66ALOJOLFIAEZ5T3}

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	2026-05-18T03:27:41.324370Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7f8da3c9762fde02dc972ca80133d9ee8385002c420c27db2d186e0a1cd8084

Aliases

arxiv: 1104.4194 · arxiv_version: 1104.4194v2 · doi: 10.48550/arxiv.1104.4194 · pith_short_12: 274NUPEXML66 · pith_short_16: 274NUPEXML66ALOJ · pith_short_8: 274NUPEX

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/274NUPEXML66ALOJOLFIAEZ5T3 \
  | 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: d7f8da3c9762fde02dc972ca80133d9ee8385002c420c27db2d186e0a1cd8084

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10f28c4bd30b5c0ff9028e474a5f49457c2d2cd3b5da83aa5dd5930e2d751553",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-21T07:33:06Z",
    "title_canon_sha256": "7ae488dceeffae0ff2f70a1136516b923ddd5267fe276b8ce34ba656897df729"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4194",
    "kind": "arxiv",
    "version": 2
  }
}