Pith Number

pith:2XPCSX7G

pith:2012:2XPCSX7GOEJDJZC3JXXANTOKZW

not attested not anchored not stored refs pending

Narrow UV Absorption Line Outflows from Quasars

Daniel Capellupo, Fred Hamann, Leah Simon, Paola Rodriguez Hidalgo

arxiv:1204.3791 v1 · 2012-04-17 · 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{2XPCSX7GOEJDJZC3JXXANTOKZW}

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	2026-05-18T03:57:39.562614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5de295fe6711234e45b4dee06cdcacdb712976fa2fcdaa973bd3e40b737f0fe

Aliases

arxiv: 1204.3791 · arxiv_version: 1204.3791v1 · doi: 10.48550/arxiv.1204.3791 · pith_short_12: 2XPCSX7GOEJD · pith_short_16: 2XPCSX7GOEJDJZC3 · pith_short_8: 2XPCSX7G

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/2XPCSX7GOEJDJZC3JXXANTOKZW \
  | 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: d5de295fe6711234e45b4dee06cdcacdb712976fa2fcdaa973bd3e40b737f0fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffd439c31e1cf6362094395601c1e596ad66d75f2d250fd537a2afd012321e21",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-17T13:37:06Z",
    "title_canon_sha256": "a8a6a08df278619a99a4b44f3b994f558616acf5279bcad9fc1aed7c2b282375"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.3791",
    "kind": "arxiv",
    "version": 1
  }
}