Pith Number

pith:VIJ53OZR

pith:2009:VIJ53OZRZYTHDID2XXDJ4VMCX3

not attested not anchored not stored refs pending

Chasing the heaviest black holes of jetted Active Galactic Nuclei

(2) Michigan Univ., (3) Insubria Univ., (4) CfA, F. Haardt (3), F. Tavecchio (1), G. Ghirlanda (1), G. Ghisellini (1), G. Pareschi (1), G. Tagliaferri (1), Italy, J. Grindlay (4) ((1) INAF-OABrera, L. Foschini (1), M. Volonteri (2), R. Della Ceca (1), USA, USA)

arxiv:0912.0001 v2 · 2009-11-30 · astro-ph.HE · 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{VIJ53OZRZYTHDID2XXDJ4VMCX3}

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	2026-05-18T02:10:35.413636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa13ddbb31ce2671a07abdc69e5582bec2b42da0fd21aafee2a6364a34aec0c1

Aliases

arxiv: 0912.0001 · arxiv_version: 0912.0001v2 · doi: 10.48550/arxiv.0912.0001 · pith_short_12: VIJ53OZRZYTH · pith_short_16: VIJ53OZRZYTHDID2 · pith_short_8: VIJ53OZR

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/VIJ53OZRZYTHDID2XXDJ4VMCX3 \
  | 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: aa13ddbb31ce2671a07abdc69e5582bec2b42da0fd21aafee2a6364a34aec0c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2871a887af6af8f8e2ca6b3d4f55f888f3be0d5e49dd08395ef30a20af523a3c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-11-30T21:00:09Z",
    "title_canon_sha256": "1451198ded632447cc59799fd8201f016ee0a317b01b8acee39dff6cc55e92d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0001",
    "kind": "arxiv",
    "version": 2
  }
}