Pith Number

pith:Z2IANBF6

pith:2021:Z2IANBF6DFB3H2IYXDNG2D7S55

not attested not anchored not stored refs pending

Optical and near-infrared pulsation properties of RR Lyrae and Population II Cepheid variables in the Messier 15 globular cluster

Anupam Bhardwaj, G. C. Sloan, Marcella Marconi, Marina Rejkuba, Soung-Chul Yang

arxiv:2108.11388 v1 · 2021-08-25 · 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{Z2IANBF6DFB3H2IYXDNG2D7S55}

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	2026-07-05T03:34:33.647453Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce900684be1943b3e918b8da6d0ff2ef4dfb2bafd335f1686060555edf9b0fbd

Aliases

arxiv: 2108.11388 · arxiv_version: 2108.11388v1 · doi: 10.48550/arxiv.2108.11388 · pith_short_12: Z2IANBF6DFB3 · pith_short_16: Z2IANBF6DFB3H2IY · pith_short_8: Z2IANBF6

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/Z2IANBF6DFB3H2IYXDNG2D7S55 \
  | 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: ce900684be1943b3e918b8da6d0ff2ef4dfb2bafd335f1686060555edf9b0fbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2154e301ba8a5ed1c784108edce25ef8097b18f3a5bdbbe827c459af8ac46b2e",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-08-25T18:00:01Z",
    "title_canon_sha256": "7d97c1c3333a25532a027e10ae18c13059bc8f878712a1eded65054d1e46297d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.11388",
    "kind": "arxiv",
    "version": 1
  }
}