Pith Number

pith:X54BB43B

pith:1997:X54BB43BIMVWU5AJHJOW5X26I2

not attested not anchored not stored refs pending

I ZW 18 -- a New Wolf-Rayet Galaxy

Craig B. Foltz (Multiple Mirror Telescope Observatory), Natalia G. Guseva (Main Astronomical Observatory, Richard F. Green (National Optical Astronomy Observatories), Trinh X. Thuan (University of Virginia), Ukraine), Yuri I. Izotov (Main Astronomical Observatory

arxiv:astro-ph/9707272 v1 · 1997-07-24 · 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{X54BB43BIMVWU5AJHJOW5X26I2}

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

Can current models predict the local black hole merger rate?

Receipt and verification

First computed	2026-05-18T02:40:35.164411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf7810f361432b6a74093a5d6edf5e46bc3e26dc948aeb204ef74cd12f81c378

Aliases

arxiv: astro-ph/9707272 · arxiv_version: astro-ph/9707272v1 · doi: 10.48550/arxiv.astro-ph/9707272 · pith_short_12: X54BB43BIMVW · pith_short_16: X54BB43BIMVWU5AJ · pith_short_8: X54BB43B

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/X54BB43BIMVWU5AJHJOW5X26I2 \
  | 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: bf7810f361432b6a74093a5d6edf5e46bc3e26dc948aeb204ef74cd12f81c378

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "081708b0a7f442a672ecb1492d2699040fbdc357fa41f2a3313d288695b79324",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-24T19:54:40Z",
    "title_canon_sha256": "d460d6ff9356f79f2c07013c883453c780c40aa319f2ea9acbec505ac8025f9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707272",
    "kind": "arxiv",
    "version": 1
  }
}