Pith Number

pith:E77DX4DX

pith:2009:E77DX4DXPYH6I27FM7WNS5W4RJ

not attested not anchored not stored refs pending

The Galaxy Population of Low-Redshift Abell Clusters

(2) Department of Astronomy, (3) Instituto Nacional de Astrofisica, Astrophysics, H. K. C. Yee (2), Omar Lopez-Cruz (3) ((1) Department of Physics, Optica y Electronica), University of North Dakota, University of Toronto, Wayne A. Barkhouse (1)

arxiv:0907.4800 v1 · 2009-07-27 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E77DX4DXPYH6I27FM7WNS5W4RJ}

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	2026-05-18T02:12:47.299610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27fe3bf0777e0fe46be567ecd976dc8a4412ae8cd2ad9af7064b5e07082319b6

Aliases

arxiv: 0907.4800 · arxiv_version: 0907.4800v1 · doi: 10.48550/arxiv.0907.4800 · pith_short_12: E77DX4DXPYH6 · pith_short_16: E77DX4DXPYH6I27F · pith_short_8: E77DX4DX

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/E77DX4DXPYH6I27FM7WNS5W4RJ \
  | 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: 27fe3bf0777e0fe46be567ecd976dc8a4412ae8cd2ad9af7064b5e07082319b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1eee93fb12de8008068c589314a344b48e167ea57d472ed16da07bbffed3d3de",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-27T23:43:56Z",
    "title_canon_sha256": "12d9ca504a15ef4060358c26e02264ad960d5261ebfab4be37af7c62e2162e09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4800",
    "kind": "arxiv",
    "version": 1
  }
}