Pith Number

pith:L4WOV5QY

pith:2011:L4WOV5QYC5M3FWTG3GWUY6B3GT

not attested not anchored not stored refs pending

VLT Spectropolarimetry of Broad Absorption Line QSOs

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

arxiv:1101.4928 v1 · 2011-01-25 · 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{L4WOV5QYC5M3FWTG3GWUY6B3GT}

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	2026-05-18T02:03:22.279764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f2ceaf6181759b2da66d9ad4c783b34e5aae0913cace11c0e8ae0ccae5d3a23

Aliases

arxiv: 1101.4928 · arxiv_version: 1101.4928v1 · doi: 10.48550/arxiv.1101.4928 · pith_short_12: L4WOV5QYC5M3 · pith_short_16: L4WOV5QYC5M3FWTG · pith_short_8: L4WOV5QY

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/L4WOV5QYC5M3FWTG3GWUY6B3GT \
  | 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: 5f2ceaf6181759b2da66d9ad4c783b34e5aae0913cace11c0e8ae0ccae5d3a23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a77a438c49b0d85c4be23596898dc4cedb42455de531d3dfd4b5e83e36cfe20",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-01-25T20:53:25Z",
    "title_canon_sha256": "dd3b34654d13cf65dd5923d43e691002ffbd3ff72f4d0f52815ab5ad0ab8d496"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4928",
    "kind": "arxiv",
    "version": 1
  }
}