Pith Number

pith:R4RW4IG7

pith:2013:R4RW4IG7BADIKPFWTJTJTQY7DW

not attested not anchored not stored refs pending

Chromatic effects in the 21 cm global signal from the cosmic dawn

A.G. de Bruyn, B. Ciardi, H.K. Vedantham, L.V.E. Koopmans, M.A. Brentjens, S.J. Wijnholds

arxiv:1306.2172 v1 · 2013-06-10 · astro-ph.IM · 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{R4RW4IG7BADIKPFWTJTJTQY7DW}

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	2026-05-18T01:49:24.338618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f236e20df0806853cb69a6699c31f1daf2e44a6a81de250f8cb786283e65986

Aliases

arxiv: 1306.2172 · arxiv_version: 1306.2172v1 · doi: 10.48550/arxiv.1306.2172 · pith_short_12: R4RW4IG7BADI · pith_short_16: R4RW4IG7BADIKPFW · pith_short_8: R4RW4IG7

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/R4RW4IG7BADIKPFWTJTJTQY7DW \
  | 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: 8f236e20df0806853cb69a6699c31f1daf2e44a6a81de250f8cb786283e65986

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c062f5c538c54da00d4382f58935b14929b361daf5b741e241c4d566c0f46745",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-06-10T11:59:52Z",
    "title_canon_sha256": "c64f7ed855fdedf974fc67951c716f8080cd48375ada5aed055900e58d6732ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.2172",
    "kind": "arxiv",
    "version": 1
  }
}