Pith Number

pith:WT2PGUHO

pith:2012:WT2PGUHOKMKR7LDXPWYXIG455H

not attested not anchored not stored refs pending

Black hole mass estimate for a sample of radio-loud narrow-line Seyfert 1 galaxies

G. Calderone, G. Ghisellini, M. Colpi, M. Dotti

arxiv:1212.1181 v1 · 2012-12-05 · 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{WT2PGUHOKMKR7LDXPWYXIG455H}

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	2026-05-18T01:52:47.218909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4f4f350ee53151fac777db1741b9de9ddb31791bbae79d088f6155717ae85ce

Aliases

arxiv: 1212.1181 · arxiv_version: 1212.1181v1 · doi: 10.48550/arxiv.1212.1181 · pith_short_12: WT2PGUHOKMKR · pith_short_16: WT2PGUHOKMKR7LDX · pith_short_8: WT2PGUHO

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/WT2PGUHOKMKR7LDXPWYXIG455H \
  | 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: b4f4f350ee53151fac777db1741b9de9ddb31791bbae79d088f6155717ae85ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "364dac6f255456f06197f858cec0dac74e16f61a1b66660980748d9347f0a9ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-12-05T21:20:57Z",
    "title_canon_sha256": "6c0617c9096288c4453008f85e30c65f3a8b8d8308e97e133a45f7ef45cbc365"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1181",
    "kind": "arxiv",
    "version": 1
  }
}