Pith Number

pith:NWIPGWLI

pith:2007:NWIPGWLIB2HBNCOMBSBNS7XNHH

not attested not anchored not stored refs pending

Far Infrared Spitzer Observations of Elliptical Galaxies: Evidence for Extended Diffuse Dust

Fabrizio Brighenti, Pasquale Temi, William G. Mathews

arxiv:astro-ph/0701431 v1 · 2007-01-15 · 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{NWIPGWLIB2HBNCOMBSBNS7XNHH}

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	2026-05-18T04:29:07.245405Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d90f359680e8e1689cc0c82d97eed39e21030177e563ea79f61d9a3a6b5b97d

Aliases

arxiv: astro-ph/0701431 · arxiv_version: astro-ph/0701431v1 · doi: 10.48550/arxiv.astro-ph/0701431 · pith_short_12: NWIPGWLIB2HB · pith_short_16: NWIPGWLIB2HBNCOM · pith_short_8: NWIPGWLI

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/NWIPGWLIB2HBNCOMBSBNS7XNHH \
  | 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: 6d90f359680e8e1689cc0c82d97eed39e21030177e563ea79f61d9a3a6b5b97d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11883b013bece2b46b6d08ec37aa44d7d087a9854aa4e97388470a68ea78f749",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-15T21:01:14Z",
    "title_canon_sha256": "20ce47c4838d9bbd23c63ac56965c22412f322cea67fbc0b9e446be664539480"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701431",
    "kind": "arxiv",
    "version": 1
  }
}