Pith Number

pith:IVVQLB2J

pith:2009:IVVQLB2JWTIGOPR5GX23HGQRJP

not attested not anchored not stored refs pending

The onset of warps in Spitzer observations of edge-on spiral galaxies

Benne Holwerda, Kanak Saha, Roelof de Jong

arxiv:0902.4436 v1 · 2009-02-25 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IVVQLB2JWTIGOPR5GX23HGQRJP}

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	2026-05-18T02:14:38.919524Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

456b058749b4d0673e3d35f5b39a114be588ac67535b6ec9ef57fdd8702b8a1c

Aliases

arxiv: 0902.4436 · arxiv_version: 0902.4436v1 · doi: 10.48550/arxiv.0902.4436 · pith_short_12: IVVQLB2JWTIG · pith_short_16: IVVQLB2JWTIGOPR5 · pith_short_8: IVVQLB2J

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/IVVQLB2JWTIGOPR5GX23HGQRJP \
  | 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: 456b058749b4d0673e3d35f5b39a114be588ac67535b6ec9ef57fdd8702b8a1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b28f24fca97ad5ceca94ce15d1d43b672e9147f0598669fd15e3a69ba19687f",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-02-25T18:30:34Z",
    "title_canon_sha256": "1fb992f42c85e16cfc3c514219472973ccabf3a1d0870aadda573a2afdd2da07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4436",
    "kind": "arxiv",
    "version": 1
  }
}