Pith Number

pith:MDTPTH3A

pith:2005:MDTPTH3A3YISAQBLEJTMZ2F5PX

not attested not anchored not stored refs pending

A very extended reionization epoch ?

A. Ferrara, A. Melchiorri, P. Serra, T. Roy Choudhury

arxiv:astro-ph/0506486 v2 · 2005-06-21 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MDTPTH3A3YISAQBLEJTMZ2F5PX}

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	2026-07-04T17:15:38.646310Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60e6f99f60de1120402b2266cce8bd7dd8fefc8ca5239e0e850bbeb6e886b323

Aliases

arxiv: astro-ph/0506486 · arxiv_version: astro-ph/0506486v2 · doi: 10.48550/arxiv.astro-ph/0506486 · pith_short_12: MDTPTH3A3YIS · pith_short_16: MDTPTH3A3YISAQBL · pith_short_8: MDTPTH3A

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/MDTPTH3A3YISAQBLEJTMZ2F5PX \
  | 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: 60e6f99f60de1120402b2266cce8bd7dd8fefc8ca5239e0e850bbeb6e886b323

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "325ae37d4565d58b5bdda391ccd82d2970efd06714a8ab243936ad2334beaadb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-06-21T11:38:42Z",
    "title_canon_sha256": "e3c5b1c0b4ce6c40369bccb5931d3ed51a454dd0a05cdb7c03a39fafab79533d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0506486",
    "kind": "arxiv",
    "version": 2
  }
}