Pith Number

pith:UBXQ7RN4

pith:2012:UBXQ7RN425DWJUSNH7JAK7XKQP

not attested not anchored not stored refs pending

The Viewing Angles of Broad Absorption Line Versus Unabsorbed Quasars

Carlos De Breuck, Michael A. DiPompeo, Michael S. Brotherton

arxiv:1204.1375 v2 · 2012-04-05 · 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{UBXQ7RN425DWJUSNH7JAK7XKQP}

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	2026-05-18T01:57:56.348013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a06f0fc5bcd74764d24d3fd2057eea83e6873f86b058bae367e9761240ca04c1

Aliases

arxiv: 1204.1375 · arxiv_version: 1204.1375v2 · doi: 10.48550/arxiv.1204.1375 · pith_short_12: UBXQ7RN425DW · pith_short_16: UBXQ7RN425DWJUSN · pith_short_8: UBXQ7RN4

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/UBXQ7RN425DWJUSNH7JAK7XKQP \
  | 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: a06f0fc5bcd74764d24d3fd2057eea83e6873f86b058bae367e9761240ca04c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32a1d70a1cd988dcc77e9b130b6a1c2d3b5a1b1d48d51b356b07b8c58b770521",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-05T23:00:05Z",
    "title_canon_sha256": "d23fb3d9e81ffeea0e41d8572f9bc023f9974321ad75ab550bbc00fb0f722ec2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1375",
    "kind": "arxiv",
    "version": 2
  }
}