Pith Number

pith:U5UPHBD2

pith:2008:U5UPHBD2XKUD54YQKUJYCVJU2E

not attested not anchored not stored refs pending

The H alpha Galaxy Survey. IV. Star formation in the local Universe

(2) Instituto de Astrofisica de Canarias, 3), (3) Mullard Space Science Laboratory, (4) Space Telescope Science Institute), I. K. Baldry (1), J. H. Knapen (2), N. S. Shane (1, P. A. James (1), R. S. de Jong (4) ((1) Liverpool John Moores University

arxiv:0802.4421 v1 · 2008-02-29 · 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{U5UPHBD2XKUD54YQKUJYCVJU2E}

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	2026-07-04T17:09:38.785650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a768f3847abaa83ef3105513815534d112a9bc1ab0245e56a53e731c49345b3f

Aliases

arxiv: 0802.4421 · arxiv_version: 0802.4421v1 · doi: 10.48550/arxiv.0802.4421 · pith_short_12: U5UPHBD2XKUD · pith_short_16: U5UPHBD2XKUD54YQ · pith_short_8: U5UPHBD2

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/U5UPHBD2XKUD54YQKUJYCVJU2E \
  | 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: a768f3847abaa83ef3105513815534d112a9bc1ab0245e56a53e731c49345b3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "969d34ca76c6c2f01ef3ed7ee54592e27203b47b560a82acabe7d8805f4222bd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-02-29T16:14:44Z",
    "title_canon_sha256": "a2b1025eb518fb2b13f6bdfeccd6eda4cb073a972e1bda9da72919a04efcbadd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.4421",
    "kind": "arxiv",
    "version": 1
  }
}