Pith Number

pith:GHPC6BEF

pith:2010:GHPC6BEFGHC2XUDBPHAUYFOUQ7

not attested not anchored not stored refs pending

The Quasar Accretion Disk Size -- Black Hole Mass Relation

(2)Department of Astronomy, (3)Harvard-Smithsonian Center for Astrophysics), Christopher W. Morgan (1), C.S. Kochanek (2), Emilio E. Falco (3) ((1)Department of Physics, Nicholas D . Morgan (2), The Ohio State University, U.S. Naval Academy

arxiv:1002.4160 v1 · 2010-02-22 · 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{GHPC6BEFGHC2XUDBPHAUYFOUQ7}

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	2026-05-18T00:52:42.322120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31de2f048531c5abd06179c14c15d487c394de62ca30c9231dd6eff3cd465daf

Aliases

arxiv: 1002.4160 · arxiv_version: 1002.4160v1 · doi: 10.48550/arxiv.1002.4160 · pith_short_12: GHPC6BEFGHC2 · pith_short_16: GHPC6BEFGHC2XUDB · pith_short_8: GHPC6BEF

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/GHPC6BEFGHC2XUDBPHAUYFOUQ7 \
  | 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: 31de2f048531c5abd06179c14c15d487c394de62ca30c9231dd6eff3cd465daf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fbc16056b6f960700b04c3f85d5d01d2c2d738d228a2a86eccbccb498ad886ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-02-22T17:51:45Z",
    "title_canon_sha256": "7539c72544b62c577bd5a59c9633d05aa537c73ebe2fca87abbcde453a2ead7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4160",
    "kind": "arxiv",
    "version": 1
  }
}