Pith Number

pith:HUHVNFY6

pith:2012:HUHVNFY64Z5CYC5DFMDGEVUCJY

not attested not anchored not stored refs pending

Complete ionisation of the neutral gas: why there are so few detections of 21-cm hydrogen in high redshift radio galaxies and quasars

M. T. Whiting, S. J. Curran

arxiv:1204.2881 v4 · 2012-04-13 · astro-ph.CO

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HUHVNFY64Z5CYC5DFMDGEVUCJY}

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.

Cited by

1 paper in Pith

Tracing Cold Gas in Absorption Across Cosmic Time with the SKA

Receipt and verification

First computed	2026-05-18T01:57:52.879423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d0f56971ee67a2c0ba32b066256824e204700fa28aba354ae9685eca317b36a

Aliases

arxiv: 1204.2881 · arxiv_version: 1204.2881v4 · doi: 10.48550/arxiv.1204.2881 · pith_short_12: HUHVNFY64Z5C · pith_short_16: HUHVNFY64Z5CYC5D · pith_short_8: HUHVNFY6

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/HUHVNFY64Z5CYC5DFMDGEVUCJY \
  | 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: 3d0f56971ee67a2c0ba32b066256824e204700fa28aba354ae9685eca317b36a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e6a0cad1b35ce70001c5a51afada56aed49c56a07be09fa5877ccff50f79faa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-13T05:03:11Z",
    "title_canon_sha256": "4251da80570b1a2d7fe00f1cc23ce66a78935059cc9098f2feaeabcaff8c60b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2881",
    "kind": "arxiv",
    "version": 4
  }
}