Pith Number

pith:DNZVGSPJ

pith:2004:DNZVGSPJIW3SA6LCRUTVEFL5N5

not attested not anchored not stored refs pending

The Evolution of the Intergalactic Medium Transmission to Redshift Six

Antoinette Songaila (Institute for Astronomy, University of Hawaii)

arxiv:astro-ph/0402347 v1 · 2004-02-13 · 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{DNZVGSPJIW3SA6LCRUTVEFL5N5}

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	2026-05-18T04:23:00.782130Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b735349e945b72079628d2752157d6f79ccbc086dca2bdd9489ea48c055d9c9

Aliases

arxiv: astro-ph/0402347 · arxiv_version: astro-ph/0402347v1 · doi: 10.48550/arxiv.astro-ph/0402347 · pith_short_12: DNZVGSPJIW3S · pith_short_16: DNZVGSPJIW3SA6LC · pith_short_8: DNZVGSPJ

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/DNZVGSPJIW3SA6LCRUTVEFL5N5 \
  | 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: 1b735349e945b72079628d2752157d6f79ccbc086dca2bdd9489ea48c055d9c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf299e327a087127385e7410484086adc26062479e77c89d890245cf6774a13a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-02-13T21:06:58Z",
    "title_canon_sha256": "481f7f4e9590de21fceaf9f32f9af51ee616fe58e6b685e05d2ac3379eee3de2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0402347",
    "kind": "arxiv",
    "version": 1
  }
}