Pith Number

pith:PV7MPDVJ

pith:2009:PV7MPDVJ4R5D7ENXSRU3CAFLNY

not attested not anchored not stored refs pending

The first search for variable stars in the open cluster NGC 6253 and its surrounding field

Ennio Poretti, Fabrizio De Marchi, Giampaolo Piotto, Marco Montalto, Silvano Desidera

arxiv:0912.2286 v1 · 2009-12-11 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PV7MPDVJ4R5D7ENXSRU3CAFLNY}

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	2026-05-18T02:10:24.387691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d7ec78ea9e47a3f91b79469b100ab6e3955cf581d45ec8caf2623ba95ff309e

Aliases

arxiv: 0912.2286 · arxiv_version: 0912.2286v1 · doi: 10.48550/arxiv.0912.2286 · pith_short_12: PV7MPDVJ4R5D · pith_short_16: PV7MPDVJ4R5D7ENX · pith_short_8: PV7MPDVJ

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/PV7MPDVJ4R5D7ENXSRU3CAFLNY \
  | 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: 7d7ec78ea9e47a3f91b79469b100ab6e3955cf581d45ec8caf2623ba95ff309e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7dae6f5db878b80adf2f27f56d8f2c27d4a98caded9c39cd30bce94e14ebb0f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-11T17:28:52Z",
    "title_canon_sha256": "82399dd3b2e1e1f4e27973f53680eccc048a905df362b282b9de881390d2910f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2286",
    "kind": "arxiv",
    "version": 1
  }
}