Pith Number

pith:OP7XGZPF

pith:2012:OP7XGZPFEJ66TRLA2OBPTR75GR

not attested not anchored not stored refs pending

Spectroscopy of extended Ly\alpha\ envelopes around z=4.5 quasars

(2) University of Haifa, A. Eigenbrod (1), D. Chelouche (2) ((1) Ecole Polytechnique F\'ed\'erale de Lausanne (EPFL), F. Courbin (1), Israel), P. L. North (1)

arxiv:1205.3895 v1 · 2012-05-17 · 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{OP7XGZPFEJ66TRLA2OBPTR75GR}

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	2026-05-18T01:57:26.111059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73ff7365e5227de9c560d382f9c7fd347d1c8003d086976cd46b69bd49ec7e14

Aliases

arxiv: 1205.3895 · arxiv_version: 1205.3895v1 · doi: 10.48550/arxiv.1205.3895 · pith_short_12: OP7XGZPFEJ66 · pith_short_16: OP7XGZPFEJ66TRLA · pith_short_8: OP7XGZPF

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/OP7XGZPFEJ66TRLA2OBPTR75GR \
  | 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: 73ff7365e5227de9c560d382f9c7fd347d1c8003d086976cd46b69bd49ec7e14

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe902a2e19099084ed4cda7da59d59cb14aa0ff7d8695b492ce225fa665d06c5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-05-17T10:07:21Z",
    "title_canon_sha256": "0b3e100772f20880c177424f5cbdcecc3e0a5429524415136c334fffe1b7cfdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.3895",
    "kind": "arxiv",
    "version": 1
  }
}