Pith Number

pith:OVKYWC27

pith:2019:OVKYWC274VXODSQKZTRRGPLXMU

not attested not anchored not stored refs pending

Into the Darkness: Classical and Type II Cepheids in the Zona Galactica Incognita

Eva K. Grebel, Gergely Hajdu, Istv\'an D\'ek\'any, M\'arcio Catelan

arxiv:1908.08290 v1 · 2019-08-22 · astro-ph.SR · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OVKYWC274VXODSQKZTRRGPLXMU}

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	2026-07-05T00:09:03.330143Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75558b0b5fe56ee1ca0acce3133d77650ee0d9e13f3dd6d3596a54417a45d627

Aliases

arxiv: 1908.08290 · arxiv_version: 1908.08290v1 · doi: 10.48550/arxiv.1908.08290 · pith_short_12: OVKYWC274VXO · pith_short_16: OVKYWC274VXODSQK · pith_short_8: OVKYWC27

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/OVKYWC274VXODSQKZTRRGPLXMU \
  | 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: 75558b0b5fe56ee1ca0acce3133d77650ee0d9e13f3dd6d3596a54417a45d627

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37783f608850c089f15042fa285ce5da945a3eac41be350ebff5eddbab15e9fc",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-08-22T10:05:42Z",
    "title_canon_sha256": "1193fe0a8e95ff90b1695ba65100840cc7f63d24443e7233b2a7252fe4e02f27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08290",
    "kind": "arxiv",
    "version": 1
  }
}