Pith Number

pith:U3TFLA4L

pith:2007:U3TFLA4LFPRXCMJLRUO63HFKUE

not attested not anchored not stored refs pending

The Quasar Accretion Disk Size - Black Hole Mass Relation

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

arxiv:0707.0305 v1 · 2007-07-02 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U3TFLA4LFPRXCMJLRUO63HFKUE}

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	2026-05-18T02:16:29.699154Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6e655838b2be371312b8d1ded9caaa1152f451568fd1244a14b85674c5309cb

Aliases

arxiv: 0707.0305 · arxiv_version: 0707.0305v1 · doi: 10.48550/arxiv.0707.0305 · pith_short_12: U3TFLA4LFPRX · pith_short_16: U3TFLA4LFPRXCMJL · pith_short_8: U3TFLA4L

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/U3TFLA4LFPRXCMJLRUO63HFKUE \
  | 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: a6e655838b2be371312b8d1ded9caaa1152f451568fd1244a14b85674c5309cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef1289b788106816e97a6dd7c769f13d16e57cdc62bd5e74f51683d125f874e4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-07-02T20:21:22Z",
    "title_canon_sha256": "344fe506b967a436e391c4181a48fd9530fb353be7d6ad867e698bd798510ec2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0707.0305",
    "kind": "arxiv",
    "version": 1
  }
}