Pith Number

pith:ZVA7C5TS

pith:2012:ZVA7C5TS42QKHNBPEPR6NHEFMW

not attested not anchored not stored refs pending

A transition mass for black holes to show broad emission lines

Gary Ferland, Martin Elvis, Susmita Chakravorty

arxiv:1211.3208 v1 · 2012-11-14 · 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{ZVA7C5TS42QKHNBPEPR6NHEFMW}

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	2026-05-18T01:53:15.853220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd41f17672e6a0a3b42f23e3e69c8565bbfc6cfa1f4b6ca556cae6b80176523f

Aliases

arxiv: 1211.3208 · arxiv_version: 1211.3208v1 · doi: 10.48550/arxiv.1211.3208 · pith_short_12: ZVA7C5TS42QK · pith_short_16: ZVA7C5TS42QKHNBP · pith_short_8: ZVA7C5TS

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/ZVA7C5TS42QKHNBPEPR6NHEFMW \
  | 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: cd41f17672e6a0a3b42f23e3e69c8565bbfc6cfa1f4b6ca556cae6b80176523f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1942e8c2fa82ed2ef85d9e9935e6bffcb5eb91cac21eabb2271afe03cf659cc4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-11-14T05:40:03Z",
    "title_canon_sha256": "d266360ceb3436e48dc4341829f8f639a9767b06d2a608bb2e6409b96cd94b86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.3208",
    "kind": "arxiv",
    "version": 1
  }
}