Pith Number

pith:XZ2MU23L

pith:1999:XZ2MU23LQOJLU6ZOK3XIKE2FW6

not attested not anchored not stored refs pending

Stroemgren photometry of globular clusters: M55 & M22

M. Hilker, P. Richter, T. Richtler

arxiv:astro-ph/9907200 v1 · 1999-07-15 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XZ2MU23LQOJLU6ZOK3XIKE2FW6}

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.

Cited by

1 paper in Pith

The Absolute Age of Milky Way Globular Clusters

Receipt and verification

First computed	2026-07-04T14:16:59.315445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be74ca6b6b8392ba7b2e56ee851345b79c835612080547db3d776c9d62238ebf

Aliases

arxiv: astro-ph/9907200 · arxiv_version: astro-ph/9907200v1 · doi: 10.48550/arxiv.astro-ph/9907200 · pith_short_12: XZ2MU23LQOJL · pith_short_16: XZ2MU23LQOJLU6ZO · pith_short_8: XZ2MU23L

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/XZ2MU23LQOJLU6ZOK3XIKE2FW6 \
  | 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: be74ca6b6b8392ba7b2e56ee851345b79c835612080547db3d776c9d62238ebf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "702f34795b4074fb289623532b1767c22f0775bb8ad7714c6d5b991c627de7dd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-15T07:15:28Z",
    "title_canon_sha256": "c75ef3db69e86546dcd7caeadcb780662b95506a292a1f404e6ee85c53f4e22a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907200",
    "kind": "arxiv",
    "version": 1
  }
}