Pith Number

pith:X53T7VU7

pith:2009:X53T7VU7EPXBXNK5G2N6VJPCCB

not attested not anchored not stored refs pending

Analysis of the fraction of clear sky at the La Palma and Mt Graham sites

A. Della Valle, S. Ortolani, V. Zitelli, Y. Maruccia

arxiv:0910.1190 v4 · 2009-10-07 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X53T7VU7EPXBXNK5G2N6VJPCCB}

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	2026-05-18T02:11:25.965994Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf773fd69f23ee1bb55d369beaa5e21063c40c2507aefbc025d37a275691c91f

Aliases

arxiv: 0910.1190 · arxiv_version: 0910.1190v4 · doi: 10.48550/arxiv.0910.1190 · pith_short_12: X53T7VU7EPXB · pith_short_16: X53T7VU7EPXBXNK5 · pith_short_8: X53T7VU7

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/X53T7VU7EPXBXNK5G2N6VJPCCB \
  | 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: bf773fd69f23ee1bb55d369beaa5e21063c40c2507aefbc025d37a275691c91f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef4af69088d23820574e6cc8bcb18e8c2635e058652367f6ab61b196c068a56d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-10-07T09:09:05Z",
    "title_canon_sha256": "ca6dc448ad96246afc2b1daa3d5b8625080e4a559f6204d02cade3535f1d64c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1190",
    "kind": "arxiv",
    "version": 4
  }
}