Pith Number

pith:PHGKLO77

pith:2005:PHGKLO77NY47LD6ARUMZT6GIOO

not attested not anchored not stored refs pending

The Westerbork HI Survey of spiral and irregular galaxies III: HI observations of early-type disk galaxies

2), E. Noordermeer (1), Groningen, Italy; (3) Department of Astronomy, J.M. van der Hulst (1), R.A. Swaters (3), R. Sancisi (1, The Netherlands; (2) INAF-Osservatorio Astronomico di Bologna, T.S. van Albada (1) ((1) Kapteyn Institute, University of Maryland, USA)

arxiv:astro-ph/0508319 v1 · 2005-08-15 · 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{PHGKLO77NY47LD6ARUMZT6GIOO}

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	2026-07-04T16:52:48.740861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79cca5bbff6e39f58fc08d1999f8c873b37666aca1344b5144e79d37ed6233df

Aliases

arxiv: astro-ph/0508319 · arxiv_version: astro-ph/0508319v1 · doi: 10.48550/arxiv.astro-ph/0508319 · pith_short_12: PHGKLO77NY47 · pith_short_16: PHGKLO77NY47LD6A · pith_short_8: PHGKLO77

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/PHGKLO77NY47LD6ARUMZT6GIOO \
  | 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: 79cca5bbff6e39f58fc08d1999f8c873b37666aca1344b5144e79d37ed6233df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "480f103d43e2a1c5ddde7014fee8a21e3a4bdd6cfd899b8ddf7491d1ebbdc7e9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-08-15T10:34:17Z",
    "title_canon_sha256": "fd535a7614170a42e4aafbddc744ba4e03c3afcd0bf86cb6e5dd7a860835ff61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0508319",
    "kind": "arxiv",
    "version": 1
  }
}