Pith Number

pith:USMJ3C6C

pith:2014:USMJ3C6CLQK6LE4XB7KNII2B5D

not attested not anchored not stored refs pending

Effects Of The Ionosphere On Ground-Based Detection Of The Global 21 CM Signal From The Cosmic Dawn And The Dark Ages

Abhirup Datta, Attila Komjathy, Geraint Harker, Jack O. Burns, Richard Bradley, T. Joseph W. Lazio

arxiv:1409.0513 v4 · 2014-09-01 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{USMJ3C6CLQK6LE4XB7KNII2B5D}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:19:19.270034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4989d8bc25c15e593970fd4d42341e8f9a06f5211aee733c6a8a634c00fae83

Aliases

arxiv: 1409.0513 · arxiv_version: 1409.0513v4 · doi: 10.48550/arxiv.1409.0513 · pith_short_12: USMJ3C6CLQK6 · pith_short_16: USMJ3C6CLQK6LE4X · pith_short_8: USMJ3C6C

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/USMJ3C6CLQK6LE4XB7KNII2B5D \
  | 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: a4989d8bc25c15e593970fd4d42341e8f9a06f5211aee733c6a8a634c00fae83

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "493c0af9dc35f198566134dad34c99d9262004242ef0ec3d592a1eeb2c7e61b2",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-09-01T19:23:59Z",
    "title_canon_sha256": "f44679da09ef52291de7565905fdc974f34ec266edb2480dcab05fe801247ded"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.0513",
    "kind": "arxiv",
    "version": 4
  }
}