Pith Number

pith:FWIV4J2J

pith:2009:FWIV4J2JFYZ3A6NVPGNAQWU6XK

not attested not anchored not stored refs pending

The optimal redshift for detecting ionized bubbles in HI 21-cm maps

Allahabad, India), India (2) Harish Chandra Research Institute, Kanan K. Datta (1), Kharagpur, Somnath Bharadwaj (1), T. Roy Choudhury (2) ((1) Indian Institute of Technology

arxiv:0906.0360 v2 · 2009-06-01 · 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{FWIV4J2JFYZ3A6NVPGNAQWU6XK}

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	2026-05-18T02:13:29.987443Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d915e27492e33b079b5799a085a9ebabdcaffd16b541b4756fce1bcc886233a

Aliases

arxiv: 0906.0360 · arxiv_version: 0906.0360v2 · doi: 10.48550/arxiv.0906.0360 · pith_short_12: FWIV4J2JFYZ3 · pith_short_16: FWIV4J2JFYZ3A6NV · pith_short_8: FWIV4J2J

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/FWIV4J2JFYZ3A6NVPGNAQWU6XK \
  | 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: 2d915e27492e33b079b5799a085a9ebabdcaffd16b541b4756fce1bcc886233a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61677323d76516215c915329d9e9fcd63d62aa77584734ac597ee81ab1c07762",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-01T20:00:06Z",
    "title_canon_sha256": "dfbd22f9ea0bb821d10e528195969fd3ae875a16cbcb1123d00f42b4ffeb3f30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0360",
    "kind": "arxiv",
    "version": 2
  }
}