Pith Number

pith:DFAQYQMX

pith:2011:DFAQYQMXNUUXH6DE4QXIYDNVXW

not attested not anchored not stored refs pending

Exploring the dust content of SDSS DR7 damped Lyman alpha systems at 2.15$\le z_{ab}< $5.2

Britt Lundgren, Daniel Vanden Berk, Donald G. York, Pushpa Khare, Varsha P. Kulkarni

arxiv:1109.4225 v1 · 2011-09-20 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DFAQYQMXNUUXH6DE4QXIYDNVXW}

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	2026-05-18T01:59:50.910527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19410c41976d2973f864e42e8c0db5bda8206e9a7d9bf62e53ed1a663f1b81c2

Aliases

arxiv: 1109.4225 · arxiv_version: 1109.4225v1 · doi: 10.48550/arxiv.1109.4225 · pith_short_12: DFAQYQMXNUUX · pith_short_16: DFAQYQMXNUUXH6DE · pith_short_8: DFAQYQMX

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/DFAQYQMXNUUXH6DE4QXIYDNVXW \
  | 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: 19410c41976d2973f864e42e8c0db5bda8206e9a7d9bf62e53ed1a663f1b81c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b0e3d4c369a23fc4536efbb6f4f1e1882d2da4e939d6145bbba218883752528",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-20T07:43:11Z",
    "title_canon_sha256": "91de6c6e11d09edd0fe6efe5aec0af28bd660ae485fe72cc58cc422e3975c537"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4225",
    "kind": "arxiv",
    "version": 1
  }
}