Pith Number

pith:IJ57EE4T

pith:2009:IJ57EE4TMEJM7JK6YVB6OW7AGL

not attested not anchored not stored refs pending

The Space Density of Compton-thick AGN

C. Cardamone, C. M. Urry, E. Gawiser (Rutgers), E. Treister (IfA, Hawaii), K. Schawinski (Yale), S. Virani

arxiv:0912.2742 v2 · 2009-12-14 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IJ57EE4TMEJM7JK6YVB6OW7AGL}

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	2026-05-18T02:10:23.748985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

427bf213936112cfa55ec543e75be032d35e38229f3f9b0eb0c724e67086be6d

Aliases

arxiv: 0912.2742 · arxiv_version: 0912.2742v2 · doi: 10.48550/arxiv.0912.2742 · pith_short_12: IJ57EE4TMEJM · pith_short_16: IJ57EE4TMEJM7JK6 · pith_short_8: IJ57EE4T

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/IJ57EE4TMEJM7JK6YVB6OW7AGL \
  | 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: 427bf213936112cfa55ec543e75be032d35e38229f3f9b0eb0c724e67086be6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6df13ee22c0d5178b4bb80857322b726b84f7368773da17c15c4e52a5efacd4e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-14T21:04:40Z",
    "title_canon_sha256": "0da5a2b2ab7ef4760d0619f6a65adee7308d5fdb6fb5bc8fe650f53d71a4419f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2742",
    "kind": "arxiv",
    "version": 2
  }
}