Pith Number

pith:7GSJMWZI

pith:2019:7GSJMWZI6RQ5OU7DKMPPGGH4OJ

not attested not anchored not stored refs pending

Galaxy Zoo: Unwinding the Winding Problem - Observations of Spiral Bulge Prominence and Arm Pitch Angles Suggest Local Spiral Galaxies are Winding

Brooke D. Simmons (Lancaster, Chris J. Lintott (Oxford), Dennis Olivan Stanescu, ESA), ICG Portsmouth), Jean Tate, Karen L. Masters (Haverford, Kevin Casteels (Victoria), Oxford), Rebecca J. Smethurst (Nottingham, Ross E. Hart (Nottingham), Sandor J. Kruk (Oxford, Satoshi Tomi (Galaxy Zoo Citizen Scientists), UCSD), William C. Keel (Alabama)

arxiv:1904.11436 v1 · 2019-04-25 · 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{7GSJMWZI6RQ5OU7DKMPPGGH4OJ}

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	2026-05-17T23:46:46.882960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9a4965b28f461d753e3531ef318fc72534fc493d197b785552f1e3661445d08

Aliases

arxiv: 1904.11436 · arxiv_version: 1904.11436v1 · doi: 10.48550/arxiv.1904.11436 · pith_short_12: 7GSJMWZI6RQ5 · pith_short_16: 7GSJMWZI6RQ5OU7D · pith_short_8: 7GSJMWZI

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/7GSJMWZI6RQ5OU7DKMPPGGH4OJ \
  | 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: f9a4965b28f461d753e3531ef318fc72534fc493d197b785552f1e3661445d08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbb0492629b18babaa1d410b8f8c2443f83e41f5ce401606ffa0a5a49581c735",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-04-25T16:19:34Z",
    "title_canon_sha256": "bc08809d31d372127a5070a9fc220201bfc724e72daaec6865ab30e618af0dce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11436",
    "kind": "arxiv",
    "version": 1
  }
}