Pith Number

pith:4QFA5LZU

pith:2018:4QFA5LZU5SCY2PGDMXW5TF4P6W

not attested not anchored not stored refs pending

Extended and broad Lyman alpha emission around a BAL quasar at z~5

Fabrizio Arrigoni Battaia, Michele Ginolfi, Raffaella Schneider, Roberto Maiolino, Sebastiano Cantalupo, Stefano Carniani

arxiv:1802.03400 v1 · 2018-02-09 · 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{4QFA5LZU5SCY2PGDMXW5TF4P6W}

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	2026-05-18T00:22:22.512580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40a0eaf34ec858d3cc365edd9978ff58e005d4c946c20d9af7254068303dfd7

Aliases

arxiv: 1802.03400 · arxiv_version: 1802.03400v1 · doi: 10.48550/arxiv.1802.03400 · pith_short_12: 4QFA5LZU5SCY · pith_short_16: 4QFA5LZU5SCY2PGD · pith_short_8: 4QFA5LZU

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/4QFA5LZU5SCY2PGDMXW5TF4P6W \
  | 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: e40a0eaf34ec858d3cc365edd9978ff58e005d4c946c20d9af7254068303dfd7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2442a8002d12a02975381ab3f6baba1b2b6c12203c02e275643ea15426c76e7c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-02-09T19:00:01Z",
    "title_canon_sha256": "8eaa49df0221b74caf2a0e23219e0afaf8a8ddeb978819e334b0cc5ad5edd687"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03400",
    "kind": "arxiv",
    "version": 1
  }
}