Pith Number

pith:2ZABY4PD

pith:2009:2ZABY4PDGJIVUE6FDX6HDVRLCU

not attested not anchored not stored refs pending

Four years of optical turbulence monitoring at the Cerro Tololo Inter-American Observatory (CTIO)

D. Walker, E. Bustos, J. Seguel, J. Vasquez, K. Vogiatzis, M. Schoeck, R. Riddle, S.G. Els, T. Travouillon, W. Skidmore

arxiv:0906.3665 v1 · 2009-06-19 · astro-ph.IM · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ZABY4PDGJIVUE6FDX6HDVRLCU}

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	2026-05-18T02:13:18.762815Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6401c71e332515a13c51dfc71d62b15200b0b6ad7003d102f965fd5d011fb39

Aliases

arxiv: 0906.3665 · arxiv_version: 0906.3665v1 · doi: 10.48550/arxiv.0906.3665 · pith_short_12: 2ZABY4PDGJIV · pith_short_16: 2ZABY4PDGJIVUE6F · pith_short_8: 2ZABY4PD

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/2ZABY4PDGJIVUE6FDX6HDVRLCU \
  | 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: d6401c71e332515a13c51dfc71d62b15200b0b6ad7003d102f965fd5d011fb39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5f87b91ea94f5fefa5c3a9af5f62c01328828d7749bc17ed2f7921821ba42d4",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-06-19T13:43:12Z",
    "title_canon_sha256": "0ffbae710b0a91335dd693021b87d5d20d21dc9b5dcaec6bca59cdd317f1848b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.3665",
    "kind": "arxiv",
    "version": 1
  }
}