Pith Number

pith:4EBAQ2YZ

pith:2009:4EBAQ2YZDVYXVBM746RYKJ264E

not attested not anchored not stored refs pending

Resolving the mid-infrared cores of local Seyferts

A. Comastri, A. Smette, C. Vignali, H. Horst, P. Gandhi, R. Gilli, S. Hoenig, W. Duschl

arxiv:0902.2777 v1 · 2009-02-16 · astro-ph.GA · 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{4EBAQ2YZDVYXVBM746RYKJ264E}

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	2026-05-18T02:14:47.495258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e102086b191d717a859fe7a385275ee11e2b3d7dc9870592043524c2ee758f0d

Aliases

arxiv: 0902.2777 · arxiv_version: 0902.2777v1 · doi: 10.48550/arxiv.0902.2777 · pith_short_12: 4EBAQ2YZDVYX · pith_short_16: 4EBAQ2YZDVYXVBM7 · pith_short_8: 4EBAQ2YZ

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/4EBAQ2YZDVYXVBM746RYKJ264E \
  | 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: e102086b191d717a859fe7a385275ee11e2b3d7dc9870592043524c2ee758f0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd73ca6e50880abcde57d76f82c573588d705b659b15ce1e69cf894fe421de41",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-02-16T21:00:07Z",
    "title_canon_sha256": "e8fec75c65bb7f98897c39042aa7eb841727113d83bb8eac71deb0376e3d6797"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2777",
    "kind": "arxiv",
    "version": 1
  }
}