Pith Number

pith:XTS2OYU7

pith:2011:XTS2OYU7FSDOMAEPKH7QVGAMG7

not attested not anchored not stored refs pending

Supermassive Black Hole Mass Estimates Using Sloan Digital Sky Survey Quasar Spectra at 0.7 < z < 2

Alireza Rafiee, Patrick B. Hall

arxiv:1104.1828 v1 · 2011-04-11 · 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{XTS2OYU7FSDOMAEPKH7QVGAMG7}

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	2026-05-18T02:02:35.785688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bce5a7629f2c86e6008f51ff0a980c37dfa23d2071ee5156f888994d1efc53f7

Aliases

arxiv: 1104.1828 · arxiv_version: 1104.1828v1 · doi: 10.48550/arxiv.1104.1828 · pith_short_12: XTS2OYU7FSDO · pith_short_16: XTS2OYU7FSDOMAEP · pith_short_8: XTS2OYU7

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/XTS2OYU7FSDOMAEPKH7QVGAMG7 \
  | 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: bce5a7629f2c86e6008f51ff0a980c37dfa23d2071ee5156f888994d1efc53f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c66855eda24bfd506c96a0ff3bacd86261e9ea48853d0632a65d8b93bce38f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-11T02:04:47Z",
    "title_canon_sha256": "51a441c140fc716ce52cda6739366dd31394817c0eba2b7cf8234763ac99bbf5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1828",
    "kind": "arxiv",
    "version": 1
  }
}