Pith Number

pith:EKUBW4IW

pith:2015:EKUBW4IWZLSO2DC6OA3UEHIHAK

not attested not anchored not stored refs pending

VLT/UVES observations of extremely strong intervening damped Lyman-alpha systems: Molecular hydrogen and excited carbon, oxygen and silicon at log N(HI)=22.4

C. Ledoux, H. Rahmani, I. P\^aris, N. Gupta, P. Noterdaeme, P. Petitjean, R. Srianand, S. L\'opez

arxiv:1502.03921 v1 · 2015-02-13 · astro-ph.GA · 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{EKUBW4IWZLSO2DC6OA3UEHIHAK}

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	2026-05-18T02:17:42.440241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22a81b7116cae4ed0c5e7037421d07028a2c8b6c532f6e2c4676654b7d2e7d6c

Aliases

arxiv: 1502.03921 · arxiv_version: 1502.03921v1 · doi: 10.48550/arxiv.1502.03921 · pith_short_12: EKUBW4IWZLSO · pith_short_16: EKUBW4IWZLSO2DC6 · pith_short_8: EKUBW4IW

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/EKUBW4IWZLSO2DC6OA3UEHIHAK \
  | 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: 22a81b7116cae4ed0c5e7037421d07028a2c8b6c532f6e2c4676654b7d2e7d6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ad6609aa824c072c31e114b8e0cee2c3969204cc071b50b99dee7a6bf2f7751",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-02-13T09:27:07Z",
    "title_canon_sha256": "2c7442a5ac85a69abd9e7b2093c2d54b42f3db866fa07816f3ab3505f7985a13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03921",
    "kind": "arxiv",
    "version": 1
  }
}