Pith Number

pith:P27IRHWJ

pith:2019:P27IRHWJOYBY5PM2XB7UXE4SSZ

not attested not anchored not stored refs pending

The redshifted 21-cm signal in the EDGES low-band spectrum

Ravi Subrahmanyan, Saurabh Singh

arxiv:1903.04540 v2 · 2019-03-11 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P27IRHWJOYBY5PM2XB7UXE4SSZ}

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	2026-07-04T23:50:15.596480Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ebe889ec976038ebd9ab87f4b9392967741dbb12f4f41e479aa6fbe7026602c

Aliases

arxiv: 1903.04540 · arxiv_version: 1903.04540v2 · doi: 10.48550/arxiv.1903.04540 · pith_short_12: P27IRHWJOYBY · pith_short_16: P27IRHWJOYBY5PM2 · pith_short_8: P27IRHWJ

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/P27IRHWJOYBY5PM2XB7UXE4SSZ \
  | 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: 7ebe889ec976038ebd9ab87f4b9392967741dbb12f4f41e479aa6fbe7026602c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9966571b6c7b4f3ab3eb4cdc7f756ac9cf13f73e84ebab0aa2e0bf31ee02d6e",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-03-11T18:53:27Z",
    "title_canon_sha256": "abd0dc406e534a04b626efcc40ce41ec302b60c1e65a220c01585ad7abdb2713"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04540",
    "kind": "arxiv",
    "version": 2
  }
}