Pith Number

pith:5AGKQIJJ

pith:2009:5AGKQIJJBHOPQ3FLXWF54ZQ72C

not attested not anchored not stored refs pending

The Origin of the Light Distribution in Spiral Galaxies

Brad Gibson, Christopher Brook, Patricia Sanchez-Blazquez, Stephanie Courty

arxiv:0905.4579 v1 · 2009-05-28 · 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{5AGKQIJJBHOPQ3FLXWF54ZQ72C}

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	2026-05-18T02:13:31.294405Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e80ca8212909dcf86cabbd8bde661fd0901d3e8e7fce9af3040b2c08a5a2d5de

Aliases

arxiv: 0905.4579 · arxiv_version: 0905.4579v1 · doi: 10.48550/arxiv.0905.4579 · pith_short_12: 5AGKQIJJBHOP · pith_short_16: 5AGKQIJJBHOPQ3FL · pith_short_8: 5AGKQIJJ

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/5AGKQIJJBHOPQ3FLXWF54ZQ72C \
  | 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: e80ca8212909dcf86cabbd8bde661fd0901d3e8e7fce9af3040b2c08a5a2d5de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd2ec8d1d1d7f9cb07fddfe1bc822354df7e8b9adb6b8162fee88870ade822d2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-28T09:13:22Z",
    "title_canon_sha256": "4dfde5d485a3556c76949d8cfdaa4d5dfcecefbefbebbb2f5b57c2835bc38adf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4579",
    "kind": "arxiv",
    "version": 1
  }
}