Pith Number

pith:2QTQ5PDU

pith:2012:2QTQ5PDUNVSROLHNL5DVYRVSQR

not attested not anchored not stored refs pending

Comparing Single-Epoch Virial Black Hole Mass Estimators for Luminous Quasars

Xin Liu, Yue Shen

arxiv:1203.0601 v1 · 2012-03-03 · 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{2QTQ5PDUNVSROLHNL5DVYRVSQR}

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	2026-05-18T01:58:15.385776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4270ebc746d65172ced5f475c46b28440f4efadfd9ea991d8a616f2e2cbe389

Aliases

arxiv: 1203.0601 · arxiv_version: 1203.0601v1 · doi: 10.48550/arxiv.1203.0601 · pith_short_12: 2QTQ5PDUNVSR · pith_short_16: 2QTQ5PDUNVSROLHN · pith_short_8: 2QTQ5PDU

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/2QTQ5PDUNVSROLHNL5DVYRVSQR \
  | 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: d4270ebc746d65172ced5f475c46b28440f4efadfd9ea991d8a616f2e2cbe389

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5d4acc5d75a63f9c40d544588b63b41f97daa58d56ea4e7330a29f5343d3710",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-03-03T03:39:46Z",
    "title_canon_sha256": "38111980035677d08e946f52c2845d087d640e65a020ec08d1a1486acf75f1d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.0601",
    "kind": "arxiv",
    "version": 1
  }
}