Pith Number

pith:4NGI25QT

pith:2001:4NGI25QTOFAFVT2BIEQJEDOS57

not attested not anchored not stored refs pending

High Resolution Spectra of Quasar AALs: 3C 191

C.B. Foltz, F.C. Chaffee, Frederick W. Hamann, R.J. Weymann, T.A. Barlow

arxiv:astro-ph/0105337 v1 · 2001-05-18 · 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{4NGI25QTOFAFVT2BIEQJEDOS57}

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	2026-05-18T02:40:36.334909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e34c8d761371405acf414120920dd2efe36724052f09d9a1b9a368dc3bc31c47

Aliases

arxiv: astro-ph/0105337 · arxiv_version: astro-ph/0105337v1 · doi: 10.48550/arxiv.astro-ph/0105337 · pith_short_12: 4NGI25QTOFAF · pith_short_16: 4NGI25QTOFAFVT2B · pith_short_8: 4NGI25QT

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/4NGI25QTOFAFVT2BIEQJEDOS57 \
  | 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: e34c8d761371405acf414120920dd2efe36724052f09d9a1b9a368dc3bc31c47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e856c70df014e7e7bf6f503d6fb6adcabbe9a65f58556f4c7e8a886559ae841f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-05-18T21:00:03Z",
    "title_canon_sha256": "9b79af3b2ab81a8a7a655dd86524a60dbbd7e395a46dd5740beb6b41f79a538e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0105337",
    "kind": "arxiv",
    "version": 1
  }
}