Pith Number

pith:VGUHC3OO

pith:2009:VGUHC3OOPS52NKQBXH5WGUJ7EX

not attested not anchored not stored refs pending

Normal galaxies in the XMM-Newton fields. X-rays as a star formation indicator

C. Goudis, D. Woods, E. Rovilos, I. Georgantopoulos, M. Pracy, M. Whiting, P. Tzanavaris

arxiv:0905.4572 v2 · 2009-05-28 · 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{VGUHC3OOPS52NKQBXH5WGUJ7EX}

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	2026-05-18T02:13:31.305004Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9a8716dce7cbba6aa01b9fb63513f25c3b5554c92aac2f11be2c6af56d42f8d

Aliases

arxiv: 0905.4572 · arxiv_version: 0905.4572v2 · doi: 10.48550/arxiv.0905.4572 · pith_short_12: VGUHC3OOPS52 · pith_short_16: VGUHC3OOPS52NKQB · pith_short_8: VGUHC3OO

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/VGUHC3OOPS52NKQBXH5WGUJ7EX \
  | 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: a9a8716dce7cbba6aa01b9fb63513f25c3b5554c92aac2f11be2c6af56d42f8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1da6421e4d25834c85b7eb82fc97e929f9a3bf374c009682ccadad722a9ed34",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-28T08:23:34Z",
    "title_canon_sha256": "3a6d823bdd1736d64fc5fa30c56556014d66620d04310bcda388870d155e9d3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4572",
    "kind": "arxiv",
    "version": 2
  }
}