Pith Number

pith:5BUQYWTF

pith:1998:5BUQYWTFXDHDVM6KTNHQXZTPGJ

not attested not anchored not stored refs pending

Star formation and the interstellar medium in low surface brightness galaxies. I. Oxygen abundances and abundance gradients in low surface brightness disk galaxies

Groningen, J.M. van der Hulst (Kapteyn Astronomical Institute, the Netherlands), W.J.G. de Blok

arxiv:astro-ph/9803308 v1 · 1998-03-27 · 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{5BUQYWTFXDHDVM6KTNHQXZTPGJ}

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	2026-07-04T14:15:44.460178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8690c5a65b8ce3ab3ca9b4f0be66f326530ab95045b9f78017992b8f66942d2

Aliases

arxiv: astro-ph/9803308 · arxiv_version: astro-ph/9803308v1 · doi: 10.48550/arxiv.astro-ph/9803308 · pith_short_12: 5BUQYWTFXDHD · pith_short_16: 5BUQYWTFXDHDVM6K · pith_short_8: 5BUQYWTF

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/5BUQYWTFXDHDVM6KTNHQXZTPGJ \
  | 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: e8690c5a65b8ce3ab3ca9b4f0be66f326530ab95045b9f78017992b8f66942d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38863b53195034841d379892c1d5ac079bbdbd5a7047268858bde113400432f9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-03-27T01:30:58Z",
    "title_canon_sha256": "0c885f0782bd40a1c9ccfb6de600cf090a0b6cf715cac281458eeca65b22b37e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9803308",
    "kind": "arxiv",
    "version": 1
  }
}