Pith Number

pith:2K4UN6LP

pith:2018:2K4UN6LPKM3IEHQYNM6Y7DJZRL

not attested not anchored not stored refs pending

Ultraviolet stellar population of the old open cluster M67 (NGC 2682)

Annapurni Subramaniam, C Anu Radha, Sindhu N

arxiv:1808.06814 v1 · 2018-08-21 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2K4UN6LPKM3IEHQYNM6Y7DJZRL}

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	2026-05-18T00:06:01.045017Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2b946f96f5336821e186b3d8f8d398ae64e23e36a006d961939a01751577af4

Aliases

arxiv: 1808.06814 · arxiv_version: 1808.06814v1 · doi: 10.48550/arxiv.1808.06814 · pith_short_12: 2K4UN6LPKM3I · pith_short_16: 2K4UN6LPKM3IEHQY · pith_short_8: 2K4UN6LP

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/2K4UN6LPKM3IEHQYNM6Y7DJZRL \
  | 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: d2b946f96f5336821e186b3d8f8d398ae64e23e36a006d961939a01751577af4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b5cab8e77ffcdb0ab4e46b3f275c3f78d37e8d3f1707ee7d31e63ee1e6db306",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-08-21T09:22:20Z",
    "title_canon_sha256": "24be2700afdac25cdc0bcd3babf8cb5f23ffff8ec61135bb0c72dc84906a9b2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.06814",
    "kind": "arxiv",
    "version": 1
  }
}