Pith Number

pith:VCDXYAGZ

pith:2011:VCDXYAGZSSQ3U7IHCN42EO5Z6T

not attested not anchored not stored refs pending

Finding Fossil Groups: Optical Identification and X-ray Confirmation

Benjamin Koester, Claudia Mendes de Oliveira, Eli Rykoff, Eric D. Miller, Gordon Garmire, Raimundo Lopes de Oliveira, Renato Dupke, Robert Proctor, Timothy McKay

arxiv:1109.4167 v2 · 2011-09-19 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VCDXYAGZSSQ3U7IHCN42EO5Z6T}

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	2026-05-18T02:00:29.028920Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8877c00d994a1ba7d071379a23bb9f4db7ae7a536b941580b86827f36856a79

Aliases

arxiv: 1109.4167 · arxiv_version: 1109.4167v2 · doi: 10.48550/arxiv.1109.4167 · pith_short_12: VCDXYAGZSSQ3 · pith_short_16: VCDXYAGZSSQ3U7IH · pith_short_8: VCDXYAGZ

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/VCDXYAGZSSQ3U7IHCN42EO5Z6T \
  | 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: a8877c00d994a1ba7d071379a23bb9f4db7ae7a536b941580b86827f36856a79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73c987b4fef2a7f9faa419fc6bf59bb63c1e17ddb09bfb234fd8a4c9d38ef5e8",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-19T20:43:04Z",
    "title_canon_sha256": "0bd2d5c8fabd1daed385ff581963d270aeaddc62f8f8e987b532b6d17d75dbdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4167",
    "kind": "arxiv",
    "version": 2
  }
}