Pith Number

pith:5NSSDFYK

pith:2019:5NSSDFYKOIFEGL5IN2C3S4PGHP

not attested not anchored not stored refs pending

The Dust in M31

Ant Whitworth (Cardiff), Haley Gomez (Cardiff), Julianne Dalcanton (Washington), Ken Marsh (CalTech), Matt Griffin (Cardiff), Matt Smith (Cardiff), Noordwijk), Olly Lomax (ESA, Phil Cigan (Cardiff), Steve Eales (Cardiff)

arxiv:1908.03458 v1 · 2019-08-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5NSSDFYKOIFEGL5IN2C3S4PGHP}

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	2026-07-04T23:58:53.744530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb6521970a720a432fa86e85b971e63bf5eef754c21c0cd9e8ae7e45ab86eabe

Aliases

arxiv: 1908.03458 · arxiv_version: 1908.03458v1 · doi: 10.48550/arxiv.1908.03458 · pith_short_12: 5NSSDFYKOIFE · pith_short_16: 5NSSDFYKOIFEGL5I · pith_short_8: 5NSSDFYK

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/5NSSDFYKOIFEGL5IN2C3S4PGHP \
  | 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: eb6521970a720a432fa86e85b971e63bf5eef754c21c0cd9e8ae7e45ab86eabe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "796bc34636512743db134d6e55cfc2231afcff91186334c634c10e207c3c3626",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-08-09T13:58:36Z",
    "title_canon_sha256": "8f5bd25ebdb6516cdd15f2f9272c7bd60c4c46b81928d17b1a1b5443db8da9d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.03458",
    "kind": "arxiv",
    "version": 1
  }
}