Pith Number

pith:OYNYGN4Q

pith:1997:OYNYGN4QGIQWVN7FCBTPJX2JM7

not attested not anchored not stored refs pending

Molecular Hydrogen Absorption in the z= 1.97 Damped Lyman alpha Absorption system toward QSO 0013-004

Jian Ge, Jill Bechtold (Steward Observatory, Univ. of Arizona)

arxiv:astro-ph/9701041 v1 · 1997-01-09 · 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{OYNYGN4QGIQWVN7FCBTPJX2JM7}

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	2026-05-18T01:07:40.315745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

761b83379032216ab7e51066f4df4967c26820ba38f1558daf39b5e189c20854

Aliases

arxiv: astro-ph/9701041 · arxiv_version: astro-ph/9701041v1 · doi: 10.48550/arxiv.astro-ph/9701041 · pith_short_12: OYNYGN4QGIQW · pith_short_16: OYNYGN4QGIQWVN7F · pith_short_8: OYNYGN4Q

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/OYNYGN4QGIQWVN7FCBTPJX2JM7 \
  | 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: 761b83379032216ab7e51066f4df4967c26820ba38f1558daf39b5e189c20854

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a55d20ebc537f79ae4073e8db632c0cb6e844c884b886df36169f87ebe551f59",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-01-09T05:51:58Z",
    "title_canon_sha256": "c20130711d94c0aae092dd626ef20bf0a5e7a39b40c26442418f60863d898ac7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9701041",
    "kind": "arxiv",
    "version": 1
  }
}