Pith Number

pith:FDBXVDCF

pith:2009:FDBXVDCFMVDU3TXHRQGUFPJTQP

not attested not anchored not stored refs pending

Ancient stars beyond the Local Group: RR Lyrae variables and Blue Horizontal Branch stars in Sculptor Group Dwarf Galaxies

E. K. Grebel, G. S. Da Costa, H. Jerjen, M. Rejkuba

arxiv:0912.1069 v1 · 2009-12-06 · astro-ph.CO · 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{FDBXVDCFMVDU3TXHRQGUFPJTQP}

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	2026-05-18T04:29:35.066531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28c37a8c4565474dcee78c0d42bd3383cf4704f18953de4953633e104aa0434e

Aliases

arxiv: 0912.1069 · arxiv_version: 0912.1069v1 · doi: 10.48550/arxiv.0912.1069 · pith_short_12: FDBXVDCFMVDU · pith_short_16: FDBXVDCFMVDU3TXH · pith_short_8: FDBXVDCF

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/FDBXVDCFMVDU3TXHRQGUFPJTQP \
  | 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: 28c37a8c4565474dcee78c0d42bd3383cf4704f18953de4953633e104aa0434e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84f7899652a050ee82e9fe6f02d15dbb262ae5b1a8c02f169cff78b237753f58",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-06T01:35:55Z",
    "title_canon_sha256": "6cc0343c9c6e514951aa938fafd7bc1642b1936b0e7660a300cd357d2fce3dca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1069",
    "kind": "arxiv",
    "version": 1
  }
}