Pith Number

pith:4ICKGNJO

pith:1998:4ICKGNJOXYX75GGSJSLKSCCOCQ

not attested not anchored not stored refs pending

Imaging around PC1643+4631A at the Lyman limit

E. Martinez-Gonzalez (IFCA-UC), I. Ferreras, N. Benitez

arxiv:astro-ph/9801150 v1 · 1998-01-15 · 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{4ICKGNJOXYX75GGSJSLKSCCOCQ}

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	2026-07-04T14:15:38.228476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e204a3352ebe2ffe98d24c96a9084e14292599276326d6a4a54814d16fb6742d

Aliases

arxiv: astro-ph/9801150 · arxiv_version: astro-ph/9801150v1 · doi: 10.48550/arxiv.astro-ph/9801150 · pith_short_12: 4ICKGNJOXYX7 · pith_short_16: 4ICKGNJOXYX75GGS · pith_short_8: 4ICKGNJO

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/4ICKGNJOXYX75GGSJSLKSCCOCQ \
  | 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: e204a3352ebe2ffe98d24c96a9084e14292599276326d6a4a54814d16fb6742d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edbee31c65a60fd795ab9f6e36626c1d77315d0835e18fb2de42ba699d268670",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-01-15T13:39:08Z",
    "title_canon_sha256": "5d83d193aab81f8a18f1b860aeb6c4abbe3eeaa9ab922d46e418de7e3e5d438e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9801150",
    "kind": "arxiv",
    "version": 1
  }
}