Pith Number

pith:4NLZZQXD

pith:2019:4NLZZQXDL2IJ7543R6OOQKOA32

not attested not anchored not stored refs pending

Global Attenuation in Spiral Galaxies in Optical and Infrared Bands

Alexandra Dupuy, Ehsan Kourkchi, Helene M. Courtois, J. Don Neill, Mark Seibert, R. Brent Tully

arxiv:1909.01572 v1 · 2019-09-04 · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4NLZZQXDL2IJ7543R6OOQKOA32}

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.

Cited by

1 paper in Pith

Testing anisotropic Hubble expansion

Receipt and verification

First computed	2026-07-05T00:12:06.451913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3579cc2e35e909ff79b8f9ce829c0de9e23ebe1434bdd45304cca512ed4ef41

Aliases

arxiv: 1909.01572 · arxiv_version: 1909.01572v1 · doi: 10.48550/arxiv.1909.01572 · pith_short_12: 4NLZZQXDL2IJ · pith_short_16: 4NLZZQXDL2IJ7543 · pith_short_8: 4NLZZQXD

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/4NLZZQXDL2IJ7543R6OOQKOA32 \
  | 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: e3579cc2e35e909ff79b8f9ce829c0de9e23ebe1434bdd45304cca512ed4ef41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d83b7b0922a9c3b55e5d78d07da88706298961a95922597a9e9b894ec65479b8",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-09-04T06:51:08Z",
    "title_canon_sha256": "4c384559c51436dc70802d54ea1cf5a0e06ea47c9dec321aea8b62a4690b655f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.01572",
    "kind": "arxiv",
    "version": 1
  }
}