Pith Number

pith:2LJTRJSS

pith:2019:2LJTRJSSAVMHITHFNGGDQQXB5G

not attested not anchored not stored refs pending

Gaia-assisted selection of a quasar reddened by dust in an extremely-strong Damped Lyman-{\alpha} Absorber at z=2.226

Bo Milvang-Jensen, C\'edric Ledoux, Jens-Kristian Krogager, Johan Fynbo, Kasper Elm Heintz, Lise Christensen, Palle M{\o}ller, Pall Jakobsson, Pasquier Noterdaeme, Stefan Geier

arxiv:1904.01686 v1 · 2019-04-02 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2LJTRJSSAVMHITHFNGGDQQXB5G}

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	2026-05-17T23:45:26.975745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2d338a6520558744ce5698c3842e1e98ac7664e6b5ab1986863c27b7d3c9f49

Aliases

arxiv: 1904.01686 · arxiv_version: 1904.01686v1 · doi: 10.48550/arxiv.1904.01686 · pith_short_12: 2LJTRJSSAVMH · pith_short_16: 2LJTRJSSAVMHITHF · pith_short_8: 2LJTRJSS

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/2LJTRJSSAVMHITHFNGGDQQXB5G \
  | 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: d2d338a6520558744ce5698c3842e1e98ac7664e6b5ab1986863c27b7d3c9f49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f42829820c28ae9796e067c8b84f63f1ae957eb0d96630ba704e3bea4e35e8c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-04-02T22:14:12Z",
    "title_canon_sha256": "b00a3e1f43074e9287172174aa0e0e42b22181bff138d73ab7f5d5d0da54d498"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01686",
    "kind": "arxiv",
    "version": 1
  }
}