Pith Number

pith:6XZWJT66

pith:2010:6XZWJT66LR72QEB7BH3FQQWUKQ

not attested not anchored not stored refs pending

Multi-Epoch HST Observations of IZw18: Characterization of Variable Stars at Ultra-Low Metallicities

A. Aloisi, A. Saha, F. Annibali, G. Clementini, G. Fiorentino, I. Musella, M. Marconi, M. Tosi, R. Contreras Ramos, R. P. van der Marel

arxiv:1001.4044 v1 · 2010-01-22 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6XZWJT66LR72QEB7BH3FQQWUKQ}

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	2026-05-18T02:09:31.054891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5f364cfde5c7fa8103f09f65842d45429cf60e17b59984b566cfa9f992ee9b3

Aliases

arxiv: 1001.4044 · arxiv_version: 1001.4044v1 · doi: 10.48550/arxiv.1001.4044 · pith_short_12: 6XZWJT66LR72 · pith_short_16: 6XZWJT66LR72QEB7 · pith_short_8: 6XZWJT66

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/6XZWJT66LR72QEB7BH3FQQWUKQ \
  | 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: f5f364cfde5c7fa8103f09f65842d45429cf60e17b59984b566cfa9f992ee9b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "635e16b13224d1ceec0f9ca421261cae1a9514faf069ef108359f90420ab316b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-01-22T17:15:50Z",
    "title_canon_sha256": "6128f6e796a6c552bee57a387e3afa078ce255ee5c4da7b1b8635857fc2cb913"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4044",
    "kind": "arxiv",
    "version": 1
  }
}