Pith Number

pith:SO4BH2MO

pith:2011:SO4BH2MOFAKQ3AC65PA6LHAPHR

not attested not anchored not stored refs pending

First stars in Damped Lyman Alpha systems

(2) Scuola Normale Superiore, Andrea Ferrara (2) ((1) Kapteyn Astronomical Institute, Groningen, Italy), Pisa, Stefania Salvadori (1), The Netherlands

arxiv:1111.6637 v1 · 2011-11-28 · 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{SO4BH2MOFAKQ3AC65PA6LHAPHR}

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	2026-05-18T01:59:22.502077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93b813e98e28150d805eebc1e59c0f3c50e35ddf2435dbfa68bd323b7ae65cee

Aliases

arxiv: 1111.6637 · arxiv_version: 1111.6637v1 · doi: 10.48550/arxiv.1111.6637 · pith_short_12: SO4BH2MOFAKQ · pith_short_16: SO4BH2MOFAKQ3AC6 · pith_short_8: SO4BH2MO

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/SO4BH2MOFAKQ3AC65PA6LHAPHR \
  | 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: 93b813e98e28150d805eebc1e59c0f3c50e35ddf2435dbfa68bd323b7ae65cee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1521a8433c953a959818ecd18f5be41d7c9d221d481c7f4b997634a29e4195dd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-11-28T22:14:56Z",
    "title_canon_sha256": "f40ab878db37a65e0e969e6c56fc53a2f36dc0c83d7c46a0baa497d30795795d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.6637",
    "kind": "arxiv",
    "version": 1
  }
}