Pith Number

pith:UKTLJ6LP

pith:2008:UKTLJ6LPEEURXE7XKTLTVZCMCZ

not attested not anchored not stored refs pending

Determining Quasar Black Hole Mass Functions from their Broad Emission Lines: Application to the Bright Quasar Survey

Brandon C. Kelly, Marianne Vestergaard, Xiaohui Fan

arxiv:0811.2001 v1 · 2008-11-12 · astro-ph

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UKTLJ6LPEEURXE7XKTLTVZCMCZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:29:25.141087Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2a6b4f96f21291b93f754d73ae44c167d75661536708fc99b9dfc2b790757c4

Aliases

arxiv: 0811.2001 · arxiv_version: 0811.2001v1 · doi: 10.48550/arxiv.0811.2001 · pith_short_12: UKTLJ6LPEEUR · pith_short_16: UKTLJ6LPEEURXE7X · pith_short_8: UKTLJ6LP

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/UKTLJ6LPEEURXE7XKTLTVZCMCZ \
  | 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: a2a6b4f96f21291b93f754d73ae44c167d75661536708fc99b9dfc2b790757c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bb2b0f7e3fb9171ba3538574d41e75af95a30e0c227d47ecb13e2059f849965",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-11-12T21:37:06Z",
    "title_canon_sha256": "ce542d27ad691c30e795d271737e282b213e68d6e7bacf98034a313acd635c69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.2001",
    "kind": "arxiv",
    "version": 1
  }
}