Pith Number

pith:MMYCBQT5

pith:2005:MMYCBQT5VN3RLCKTXTPBH4U55U

not attested not anchored not stored refs pending

Damped Lyman alpha Systems

Arthur M. Wolfe (UCSD), Eric Gawiser (Yale), Jason X. Prochaska (UCSC)

arxiv:astro-ph/0509481 v2 · 2005-09-16 · 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{MMYCBQT5VN3RLCKTXTPBH4U55U}

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.

Cited by

1 paper in Pith

Machine Learning Techniques for Astrophysics and Cosmology: Lyman-$\alpha$ forest

Receipt and verification

First computed	2026-07-04T15:45:42.990525Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae

Aliases

arxiv: astro-ph/0509481 · arxiv_version: astro-ph/0509481v2 · doi: 10.48550/arxiv.astro-ph/0509481 · pith_short_12: MMYCBQT5VN3R · pith_short_16: MMYCBQT5VN3RLCKT · pith_short_8: MMYCBQT5

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/MMYCBQT5VN3RLCKTXTPBH4U55U \
  | 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: 633020c27dab77158953bcde13f29ded3c8c2b6a4c5d99948c26768138ac9cae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cabf9b8a6baeb06ef9f72f679fc225ecadbfb41db7ebd04b1a02c8a51b972e5f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-16T00:58:44Z",
    "title_canon_sha256": "5856cec8c208720cdba4a207e9424e750571705069407ca403f981f1e3701e7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509481",
    "kind": "arxiv",
    "version": 2
  }
}